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Degradation of Date Palm Trees and Date Production in Arab Countries: Causes and Potential Rehabilitation


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The date palm (Phoenix dactylifera L.) is a major fruit crop in most Arab countries. it has historically been connected with sustaining human life and tradition of the people in the old world as a major agricultural crop. Arab countries possess 70% of the 120 million world's date palms and are responsible for 67% of the global date production. During the past 50 years, date palm groves were subjected to degradation due to extensive exploitation resulting from the increase in the human population and domestic animals. Like many other plants, some palms are in danger of dying out because of human activity. Date palm production faces serious problems such as low yields as well as marketing constraints. Over the last decade, productivity of date palm trees has declined in the traditional growing areas. As much as 30% of production can potentially be lost as a result of pests and disease. In the Gulf countries and Egypt, the Red Palm Weevil has recently become one of the major date palm pests, while Bayoud disease caused by a parasitic fungus is a common threat to date palms in North Africa. Technical and socio-economic factors contributed for date palm degradation. Also, date processing and marketing have affected the economic revenue from date production and its quality. Rehabilitation of date palm trees in the Arab countries is crucial and needs collaborative efforts and a dedicated budget. Recommendations for stopping the degradation in date palm sector and strengthening this industry particularly for cultivation, harvesting, date processing and marketing in the Arab countries have been proposed. Key words: Date palm, degradation, Date production, Arab countries, Rehabilitation
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Australian Journal of Basic and Applied Sciences, 4(8): 3998-4010, 2010
ISSN 1991-8178
© 2010, INSInet Publication
Corresponding Author: Loutfy I. El-Juhany, Prince Sultan Research Centre for Environment, Water and Desert, King Saud
University, P. O. Box 2454 Riyadh 11451, Saudi Arabia Telephone: +966508860400
Fax: +966-1-4675574 3998
Degradation of Date Palm Trees and Date Production in Arab Countries: Causes and
Potential Rehabilitation
Loutfy I. El-Juhany
Prince Sultan Research Centre for Environment, Water and Desert, King Saud University,
P. O. Box 2454 Riyadh 11451, Saudi Arabia Telephone: +966508860400
Fax: +966-1-4675574
Abstract: The date palm (Phoenix dactylifera L.) is a major fruit crop in most Arab countries. it has
historically been connected with sustaining human life and tradition of the people in the old world
as a major agricultural crop. Arab countries possess 70% of the 120 million world's date palms and
are responsible for 67% of the global date production. During the past 50 years, date palm groves
were subjected to degradation due to extensive exploitation resulting from the increase in the human
population and domestic animals. Like many other plants, some palms are in danger of dying out
because of human activity. Date palm production faces serious problems such as low yields as well
as marketing constraints. Over the last decade, productivity of date palm trees has declined in the
traditional growing areas. As much as 30% of production can potentially be lost as a result of pests
and disease. In the Gulf countries and Egypt, the Red Palm Weevil has recently become one of the
major date palm pests, while Bayoud disease caused by a parasitic fungus is a common threat to date
palms in North Africa. Technical and socio-economic factors contributed for date palm degradation.
Also, date processing and marketing have affected the economic revenue from date production and
its quality. Rehabilitation of date palm trees in the Arab countries is crucial and needs collaborative
efforts and a dedicated budget. Recommendations for stopping the degradation in date palm sector and
strengthening this industry particularly for cultivation, harvesting, date processing and marketing in
the Arab countries have been proposed.
Key words: Date palm, degradation, Date production, Arab countries, Rehabilitation
The date palm (Phoenix dactylifera L.) is considered a symbol of life in the desert, because it tolerates
high temperatures, drought and salinity more than many other fruit crop plant species. It is one of the oldest
trees from which man has derived benefit, and it has been cultivated since ancient times. It the only indigenous
wild desert plant definitely domesticated in its native harsh environments appears to be the date palm (Zohary
and Hopf, 2000).
The heavenly religions honored the date palm and showed concern for its cultivation and care. But no
other religion has stressed the regard for dates and the date palm as much as Islam. The Holy Koran mentions
dates and the date palm in many suras (chapters) and verses. Prophet Muhammad (peace be upon him) is
reported to have said that the best property is the date palm, that dates cure many disorders, and he urged
Muslims to eat dates and tend the date palm (Zaid and de Wet, 1999).
The date palm is considered a renewable natural resource because it can be replaced in a relatively short
period of time or used through conservation efforts without depletion (University of Delaware, 2004). The exact
origin or gene centre of the date palm has been lost in history, but evidence of date palm cultivation goes as
far back as 4000 B.C. in what is now southern Iraq. References to date palms have also been found in Ancient
Egypt (Barreveld, 1993). Remains of dates have been found on a number of Neolithic sites, particularly in
Syria and Egypt. This means that they were being eaten by man as much as 7,000 to 8,000 years ago (Lunde,
Aust. J. Basic & Appl. Sci., 4(8): 3998-4010, 2010
The date palm retains its value for cultivators as it gives a wide range of products and services, including
many necessities of life. The date, the primary product of the palm, is rich in protein, vitamins, and mineral
salts. That is why it represents an essential element of diet for the cultivator himself and his animals. All
secondary products of the palm result from annual pruning and have essential uses for the cultivator.
Unfortunately, the date palms grown in the Arab region are under threat from diseases, pests, environmental
changes and socio-economic factors. Of the estimated 120 million date palms in the world, over two-thirds are
in Arab countries (FAO, 1982).
The present work aims at shedding light on the importance, current status, degradation trends, constraints,
and potential rehabilitation of the date palm and its production in the Arab countries (members of the League
of Arab States).
Importance of Date Palm:
The date palm is a major agricultural crop in the Near East and North Africa, and it has historically been
connected with sustaining human life in many of the hot and barren parts of the old world and has become
an integral part of the culture and tradition of the people of these regions (Sawaya, 2000).
Date palms grow from Morocco in the west across the lower-altitude expanses of the Arab countries up
to the foothills of the Himalayas. It is also found in pockets elsewhere in the world, notably in the American
Southwest where date cultivation was first introduced by Spanish missionaries and where early in the 1900's
offshoots imported from Algeria and Iraq were planted for commercial purposes (Saudi Aramco World, 1962).
The date palm needs a climate with plentiful sun, minimal rain, yet good access to water, which to a large
extent is only provided by oases. They are very cold tolerant, salt tolerant; they can also take extreme heat,
dry and wet conditions (Saudi Aramco World, 1962). Within the climatological limits of where the palms are
now grown, the upper range of temperature tolerance is of little importance to the palm. Maximum
temperatures of around 50oC as they occur do not harm the palm (Barreveld, 1993). In Arab countries, the date
palm is considered one of the main fruit crops. The number of date palms, as well as date production and
consumption, vary from one country to another due to prevailing environmental conditions, the intention paid
to this crop and social conventions. The major producers of dates in the world are situated in the Arabia Gulf
and North Africa. Kader and Hussein (2009) reported that in 2006, world production of dates was about 7
million tones and the top 10 producing countries were Egypt, Saudi Arabia, Iran, United Arab Emirates,
Pakistan, Algeria, Sudan, Oman, Libya, and Tunisia. There are thousands of date palm cultivars, including
those with soft, semi-dry, and dry fruits (depending on their water and type of sugar content at harvest when
fully-ripe), grown in these countries (Kader and Hussein, 2009). This is true as the Arab countries possess the
majority of world’s date palms and produce the majority of the world’s total date crop (FAOSTAT, 2009).
The date palm not only provides a concentrated energy food, it also creates a more amenable habitat for
the people to live in by providing shade and protection from the desert winds. In addition, the date palm yields
a variety of products for use in agricultural production and for domestic utensils.
Modern technological developments have made it possible to look at the palm as a raw material source
for industrial purposes. Practically all parts of the date palm, except perhaps the roots, are used for a purpose
best suited to them.
The fruit of the date is a drupe and has one seed, which can vary in size, shape, color and quality of
flesh. The date itself is a high energy food item for both people and livestock. Since ancient times, the date
palm has been a source of food for the inhabitants of the Arab countries. Dates have proved to be the best
resource to ensure food security during food shortages and crises.
The date palm is a crop capable of establishing a sustainable system in subsistence agricultural areas and
thus plays an important social role in reinforcing the subsistence base of a large population group by helping
them to settle in rural areas versus migration to urban centers (Sawaya, 2000). The tree is a spectacular palm
for landscaping large areas. It provides shade and protection from wind. It also prevents soil degradation and
desertification, thus protecting the environment. In fact, the date palm represented an eloquent example of
integrated sustainable use of renewable material resources (EI-Mously, 1998). The most commonly used parts
of the date palm are its fruits, bark and leaves and they have the many commercial and medicinal applications.
Date, the primary product of the palm, is rich in protein, vitamins, and mineral salts. So that it represents an
essential element of diet for the cultivator himself and his animals (EI-Mously, 1998). In recent times, there
has been a renewed interest in the date as a food source, not necessarily as a staple food, but rather as a
component in food preparations like sweets, confectionery, baking products, institutional feeding and health
foods (Barreveld, 1993).
Aust. J. Basic & Appl. Sci., 4(8): 3998-4010, 2010
All non-fruit components of the date palm (frond bases, midrib, leaflets, spikelets, fruit stalks, spathes)
have a certain but limited value for ruminant feeding (in natural environments with no or limited alternatives
it should be used). Leaves are very often used to construct fences providing wind protection and creating
favourable micro-climates for horticulture and/or in nurseries. Also, date palms are providing construction
material for different purposes (roofs, fences, baskets, cranes, textiles etc.) (Naturland, 2002). Secondary
products of the palm result from annual pruning and have essential uses for the community, thus, no waste
results from the growing of palms (EI-Mously, 1998). Date palm has provided many pharmaceutical uses from
the ancient times till now. Medically, dates were recommended in mouth washes (an application most likely
frowned upon by a present-day dentist); as a purgative or in gynaecologically related interventions (Darby et
al. 1977). They added that dates formed part of various ointments, bandages and opthalmic prescriptions and
Plinius reports: "dates are applied with quinces, wax and saffran to the stomach, bladder, belly and intestines.
The sap of leaves is a remedy for nervousness, kidney trouble and putrid wounds and calms the effervescence
of the blood. Burnt seeds are made in an ointment for ulcers or a collyrium that produce long eyelashes.
The fruit, because of its tannin content, is used medicinally as a detersive and astringent in intestinal
troubles. In the form of an infusion, decoction, sirup or paste, is administered as a treatment for sore throat,
colds, bronchial catarrh. It is taken to relieve fever, cystisis, gonorrhea, edema, liver and abdominal troubles.
And it is said to counteract alcohol intoxication. The seed powder is an ingredient in a paste given to relieve
ague. A gum that exudes from the wounded trunk is employed in India for treating diarrhea and genito-urinary
ailments. It is diuretic and demulcent. The roots are used against toothache (Morton, 1987). This sampling of
medicinal use of date palm products could not end without reference to the invigorating power bestowed on
man when consuming male flowers and male spathe (Popenoe, 1973).
The Present Status of Date Palms and Date Production in Some Arab Countries:
The world date palm cultivation is concentrated mostly in the Near East and North Africa, favoured by
the suitable dry sub-tropical and high temperature climate prevailing in these regions (Sawaya, 2000).
According to the report of FAO (FAOSTAT, 2009) about 75% of the world production of dates is in Arab
countries for 2008; half of these is in Gulf area (including Iraq and Yemen) and the other half is in North
Africa countries (including Sudan) (FAOSTAT, 2009) (Fig. 1). Production of dates in Arab countries stood
at 5,096.99 tones produced from 82,346.08 date palm trees (AOAD, 2008) (Table 1). This clearly indicates
that most of the world’s date production is concentrated in a few countries in the same region. Date production
of Egypt alone represents about 20% of the total World production, while Tunisia, Algeria and Saudi Arabia
are among the five leading date-exporting countries (Zaid, 2001). North Africa is the second most important
growing area for date palms in the world with approximately 30% of the world’s total number of date palms;
its production is about 1,500,000 tones of dates (Oihabi, 2001). In addition to the Arab countries, Pakistan and
Iran are considered of the main date producers, with production accounted for 14.20% and 9.65% of the total
World date production, respectively, for 2008 (Fig. 1).
Jaradat and Zaid (2004) reported that the red palm weevil [(Rhynchophorus ferrugineus (Olivier)] is
threatening the Arab region’s date palm trees. On the other hand, drought, due to a lengthy rainless period and
drying up of many water wells, and as a consequence, increased water and soil salinity, are two serious threats
to the expanding date palm plantations in most parts of the Arabian Peninsula. Due to economic and social
factors, the diversity of date palm groves in most countries in the Arabian Peninsula and North Africa is
declining and the composition of these groves as to the number of cultivars witnessed a sharp decline in recent
It is worth mentioning that accurate statistics on the number of date palms are not always available and
not easy to collect (Zaid, 2001). The number of date palms presented in publications could be deceptive
sometimes, as one can not know whether the trees are mature producing trees or young palms. The following
describes the present status for date production in the main date-growing counties of the Arab countries.
Historically, it is said that Iraq is the tree’s birthplace. The date palm has an important status in Iraq as
it was the first country in the world when it comes to the number of date palms. Jaradat (2003) reported that
more than 30 million date palms existed in the early 1960s. In terms of date production, Iraq used to be a
major producer of dates but in recent years the amount of dates produced and exported has decreased. In the
1980s and mid-1990s, Iraq was consistently among the top five date-producing countries in the world and often
ranked number one in terms of production by volume (Walsborn, 2008). In the early 1980s, an estimated 30
million date palm trees were growing in Iraq, but the number has declined dramatically since then (Rahif et
Aust. J. Basic & Appl. Sci., 4(8): 3998-4010, 2010
al., 1988). The devastation of the Shatt al Arab area during the Iran-Iraq War hastened the destruction of date
palm groves, and in 1985 the government estimated the number of date palms at fewer than 13 million
(Jaradat, 2003). In 2006, Iraq produced 432,000 tones of dates from 7,878,000 trees (AOAD, 2008), while
produced 440,000 tones in 2007 and exported 37063 tones for USD 9532000 (FAOSTAT, 2009).
Fig. 1: Date production (tones) in the Arab countries for 2008 (Country with production less than 20,000
tones do not included); Iran and Pakistan were added for comparison (FAOSTAT, 2009).
Table 1: Number of productive date palms and area in the Arab countries for 2007 (AOAD, 2008)
Country No. productive trees (× 1000 trees) Area (× 1000 ha)
Jordan 104.38 0.66
United Arab Emirates 16342.19 219.30
Bahrain 379.98 1.52
Tunisia 3335.80 46.00
Algeria 10926.00 159.87
Saudi Arabia 12000.00 155.70
Sudan 2646.00 35.28
Syria 72.60 0.13
Iraq 8024.00 101.50
Oman 2457.00 32.76
Palestine Territories 301.20 0.30
Qatar 335.30 1.44
Kuwait 312.21 1.45
Libya 2100.00 28.00
Egypt 12039.42 36.45
Morocco 5760.00 42.00
Mauritania 600.00 8.00
Yemen 4610.00 10.40
Total 82346.08 880.76
Date palm in Iraq was subjected to many agricultural pests and biotic and abiotic factors such as
negligence, salinity and overharvesting in addition to the overall economic factors that have passed the country
as a result of the wars and the economic embargo. These factors have caused deterioration of the date palm
productivity and resulted in revert in scientific research in this field for a period of more than twenty years
(1980-2000) (Al-Jboory, 2007). Greiner (1998) defined the constraints to date palm production in Iraq as
drought, high salinity, aged trees, diseases, and genetic erosion. Despite the damage suffered to date palm
plantations during the wars, dates continue to be the most important agricultural product. Recently, the Iraqi
government has established the General Authority for Horticulture and Forestry. The mission of this authority
is to develop and extend the planting of date palms into the various regions of the country using modern
techniques, as well as to improve existing orchards. Fortunately many of the Iraqi date gardens remain and
can be rehabilitated by a series of interventions that will provide appropriate farming, post-harvest and
processing, and marketing technology, facilities, and skills to the industry (Walsborn, 2008). Marshlands
Restoration Program led by the Iraqi Ministry of Water Resources in cooperation with United States Agency
for International Development (USAID) and other donors launched in 2004 and aims to improve the ecosystem
of marchland in the southern part of the country. This will assist restoring the largest date palm orchard in the
Aust. J. Basic & Appl. Sci., 4(8): 3998-4010, 2010
world. Development of a date palm cultivation programme was another project funded by (FAO) and United
Nations Industrial Development Organization (UNIDO) for rehabilitation of the date palm sector in Iraq started
2007. Recently, the Iraqi government has established the General Authority for Horticulture and Forestry. The
mission of this authority is to develop and extend the planting of date palms into the various regions of the
country using modern techniques, as well as to improve existing orchards. It is also working towards the
development of harvesting methods and the identification of local and international markets for the yield.
Saudi Arabia:
The date palm is one of the most important cash crops in Saudi Arabia. After the modern Kingdom of
Saudi Arabia was founded in 1932, the date palm was incorporated in its national emblem, as representative
of "vitality and growth". Saudi's groves feature more than 20 million trees and more than 320 varieties of the
fruit (Yang 2009).
The date palm plantations occupying 150,744 ha where 23 million trees produce 970,488 tones of dates
annually (Alhudaib et al., 2007). Earlier, Al Abdulhadi et al. (2004) reported that the estimated number of date
palm trees in the Kingdom is 18 million and its annual production of dates estimated at 700,000 tons. In 2006,
the Kingdom became the world's second largest producer of dates, supplying 17.6% of the world market.
Production increased from 712,000 MT in 1999 to 870,000 MT in 2003 to 977,000 MT in 2006 (AOAD,
2008). FAOSTAT (2009) estimated the production of 2008 as 982546 tones representing 13.94% of the total
World date production. The production of dates exceeds local consumption requirements. The rate of date
consumption inside the country has decreased due to the existence of other fresh fruits and sweets in addition
to changes in family size and food traditions. The country also donates a large amount of dates to hunger-
stricken countries through the United Nation's World Food Program (World Food Programme, 2009).
The main problems of date production in Saudi Arabia are pests, diseases and a lack of marketing studies
to identify promising markets. Saudi dates are facing competition in the international markets, in particular
from Tunisia and Iran. Furthermore, insufficient efforts are being undertaken to adopt new technologies and
modern machines to enhance the productivity of the date industry for exporting purposes. Scarcity of water
contributes vigorously to reducing date palm productivity and even to the death of the trees. Date palms are
accused of consuming a lot of water. In 2004, a Saudi hydrological expert claimed that date palm is water
consuming and suggested to stop planting it and consequently stop monetary aid for date farmers. He advised
them to plant other crops such as citrus (Al-Habib, 2004). However, researchers at the Department of Water
Guidance of the Irrigation and Drainage Authority in Al-Ahsaa Governorate carried out a study for three years
and found that the amount of water given to date palms in Saudi Arabia surpasses the actual requirements of
the tree at a rate of 100%. This study showed that the appropriate amount of water to be given to the date
palm is 63 cubic meters per year at a rate of 150 and 200 liters per day in winter and summer, respectively.
It also showed that using drip irrigation is better than irrigation with bubblers, as the former increases the
efficiency of water use with minimal losses (Saudi Press Agency, 2009).
Although the cultivation of date palms has developed considerably and great attention has been given to
date production in Saudi Arabia, nonetheless, the level of date productivity is considered low compared with
other date producing countries (Al-Obaid, 1996). The main causes for this decrease in date productivity are
the increase in the number of the overage trees, the existence of many low quality and undesirable varieties
of dates, lack of sufficient offshoots to establish new orchards or even renew the old ones, and the increase
in price of new offshoots of good quality varieties (Al-Ma'ary, 1995; Bashah, 1999; Al-Sakran and Muneer,
The most important pests and diseases that infest date palm in Saudi Arabia are mainly red palm weevil
(RPW) and Al Wijam disease. Phytoplasma pathogen was suspected to cause Al-Wijam; its main symptoms
are leaf stunting, yellow streaking and a marked reduction in fruit and stalk size, which leads to failure in fruit
production at harvest (Alhudaib et al., 2007). Lack of efficient integrated pest management (IPM) has resulted
in the spread of pests and diseases in different regions of the country.
United Arab Emirates:
The United Arab Emirates (UAE) has the largest number of date palms for any single country in the
world. It was reported to have 40 million date palm trees and a minimum of 200 cultivars, 68 of which are
the most important commercially (Jaradat and Zaid, 2004). Abboudi (2000) reported that the UAE has become
100% self-sufficient in its date consumption. In 2006, the UAE had 16,342,190 productive date palms
producing 757,600 tones of dates (AOAD, 2008). Recently, The UAE has been officially recognized as the
world’s leading cultivator of date palms with 42 million trees, as was announced on 15 March 2009.
Aust. J. Basic & Appl. Sci., 4(8): 3998-4010, 2010
However, there are some problems facing the issue of date palms and their production in UAE. These
include shortage of qualified and trained staff in various date palm activities, lack of adequate pests and disease
research studies, narrow list of good quality varieties, poor harvesting, processing and packing techniques and
poor water management as the overuse of the limited groundwater extensively (UNDP, 2004). As in the other
neighbouring countries the Red Palm Weevil (RPW) is considered a major pest of the date palm in UAE. It
has been a big menace to the date palm during the last twenty years costing a lot of money and a lot of effort
to control. It was discovered in UAE in 1985 and its importance lies in being a fast killer to the palm
(Gassouma, 2004). During a period of 5 years, the RPW infected trees in the UAE jumped from 1,3000 in
1990 to 44,000 date palms in 1995.
Cultivation of date palms in Egypt goes back to thousands of years. In Egypt, agricultural operations on
date palm, like pollination, are known at least since 2500 BC proved by ancient texts. In Egypt, date palm is
cultivated and grown everywhere (Taeckholm, 1974). Nowadays date palm plantations are spread out all over
Egypt, wherever water is available (Riad, 1996) and date industry supports over one million people (Bazza,
2008). Before more than a century, Egypt was exporting date palms where potted offshoots from Egypt reached
California in 1890 and 'Hayany'—the cultivar most extensively planted in Egypt introduced into California in
1901 (Morton 1987). Egypt has been the world’s largest producer of dates since 1974 (FAOSTAT, 2009) and
reports very high average yield compared to other countries. This is said to be due to good access to water
by palms growing along the Nile valley (Bazza, 2008). Cultivation of new date palms is continuous, in
particular in the new reclaimed land in the desert and in saline-affected areas. In 2006, productive date palms
were estimated at 11,888,020 million trees and produced 1,328,720 tones of dates (AOAD, 2008). Date palms,
however, are facing a devastating threat in the form of the Red Palm Weevil.
This pest was first discovered in Egypt at the end of November 1992 in El-Hussinia region in Al-
Sharquiya, northeastern governorate (Cox, 1993). In Egypt itself, the introduction of the red palm weevil was
caused by an importation of offshoots from the United Arab Emirates (Ferry, 2002). In 2005, 70,000 of
Egypt’s 13 million palms are infected by weevils. In the two provinces where the pest was first recorded, the
insects continue to infect and kill new date palms year after year, despite all the techniques developed to
combat it (Roic, 2005).
The fact is this problem still persists 16 years later, with no method of complete eradication. Research on
ways to control the weevil is being carried out, but, because the fruit from date palms is harvested for human
consumption, options for this species are limited. So far, no country has been able to eliminate the weevils
completely. Unfortunately, the use of insecticides has led to the development of strains that are resistant to
some of the chemicals used (Williams, 2008).
The date palm sector in Egypt does not has a national marketing authority to be in charge of designing
a clear strategic policy for exporting dates, in addition to the lack of care in categorizing dates for export or
grading them in terms of quality and pricing. Furthermore, FAO (2004) reported that the Egyptian dates face
a strong competition in the markets from those of Saudi Arabia, Iran, Tunisia and United Arab Emirates. Also,
Egypt has insufficient capacity in its factories to process and cure large numbers of dates (Riad, 1996).
In Tunisia, date palms occur in the southern part of the country (North latitude 34°25`), where the
conditions are most favorable for the production and ripening of such valuable “dessert date” varieties as
Deglet Nour. This variety accounts for 60% of the total production (Triki et al., 2003). Tunisia is the world-
leading producer of Deglet Nour (FAO, 2003).
Although Tunisia represents only about 2% of the world's production, it is the leader in terms of value
of exports with 30% of the world's export total and it provides Europe with more than half of its Deglet Nour
dates. Tunisian date palm plantations are characterized by the prevalence of this variety in spite of their large
genetic diversity. It is occupies approximately 60% of the Tunisian palm plantations and continues to be
multiplied (Bouguedoura et al., 2008). In 2006, Tunisia’s fruiting date palms were estimated at 3,335,800 and
produced 125,000 tones of dates (AOAD, 2008(AOAD, 2008). The date palm sector in Tunisia comes in third
place at its domestic farm product exports, after olive oil and seafood products. Tunisian dates are placed third
in the world's ranking in terms of quantities exported for 2007 after Iran and Pakistan (FAOSTAT, 2009). The
date producers aim mainly to improve the quality and marketing methods to face the competition of other
countries, like Algeria and Morocco.
Aust. J. Basic & Appl. Sci., 4(8): 3998-4010, 2010
In Tunisia, Bayoud disease has not been reported. However, some other diseases are found, as those
associated with the presence of some fungi, insects and nematode species (Hammadi et al., 2009). Old age
of the palm groves is a considerable constraint as a proportion of 45% of the palm trees in Tunisia has more
than 50 years (Baaziz et al., 2000).
Date palm culture remains the pivot of the desert ecosystem which occupies almost 80% of the whole
surface of Algeria (Touzi, 2007). Algeria ranks fifth in the list of producer countries with 0.52 M tons in 2005
from some 10.4 million trees (Bachir et al., 2008). The Algerian palm groves currently have 45% of the
cultivar Deglet Nour (Bouguedoura et al., 2008) and it is the world second largest producer of this variety (1
million trees) (FAO, 2003). Tunisia and Algeria have focused on the high value confectionary market in
Europe (Bachir et al., 2008). In 2006, Algeria had 10,475,150 date palms producing 492,190 tones of dates
(AOAD, 2008). In 2008, Algeria produced 500,000 tones of date palm represented 7.09% of the total World
date production (FAOSTAT, 2009).
Date palm sector in Algeria has suffering problems such as potentialities, technical and environmental
constraints and socio-economic preoccupations. Many palm groves were hence fully destroyed, ever buried
under sand dunes, or under the influence of drought, and seriously damaged by Bayoud disease (Touzi, 2007).
Bayoud destroyed the half of date palms in Western Algeria oases (Bouguedoura et al., 2008). Poor marketing
on a national and international scale is also a problem because of a lack of adequate organizations. Like in
Tunisia, old age palm trees in Algeria that the exceeded the production age account 30% of the total country
date trees (Baaziz et al., 2000). Moreover, the absence of rapid means for transporting dates from farms to
markets contributes to deterioration of the dates. This problem seems to be either solved or reduced as the
Algerian government has set up a "green corridor" for exporting dates in September 2006 through arrangements
will ensure maximum flow for export operations, allowing the rapid transport of dates to ports of entry.
Date palm is grown mainly in eleven provinces in Morocco, situated in the southern and northeastern parts
of the country (Larbi, 1989). Its cultivation constitutes the basis of oasis agriculture in these regions. Baaziz
et al. (2000) mentioned that in Morocco there are 4.8 million trees but only 2.1 million are considered to be
productive. However, good quality dates represent only around 25% of total production. This situation contrasts
strongly with that prior to the 20th century when Morocco was renowned for dates of superior quality and
production levels were much higher (Greiner, 1995). The date palm in Moroccois in clear decline and suffers
from a lack of maintenance and interest (de Haas and El Ghanjou, 2000) as a result of emigration of skilled
labour to work in the cities, in addition to the decrease in water resources. The status of date production
continues to worsen as a result of a combination of factors including prolonged drought, disease and
infestation, and sanding up (Greiner, 1995). While date palm is affected by many diseases, Bayoud remains
the most serious one.
In 2006, Morocco had 3,880.700 productive trees producing 45,500 tones of dates. It was the least figure
reported comparing with 120,000 tones in 1990; the greatest one. FAOSTAT (2009) reported that date
production of Morocco in 2008 was 72,700 tones, represented only 1.03% of the World date production. Date
production in Morocco varies greatly due to variation in rainfall (Baaziz et al., 2000).
Degradation of Date Palm Trees in the Arab Countries: Indicators and Causes:
Like many other plants, some palms are in danger of dying out because of human activity. Although date
palm cultivation in the date growing regions of the world has a long history, yet the efforts expended for the
development of this important crop, although significant, yet still insufficient and fall below expectations. In
general, the product quality is still low, the field and post-harvest losses are quite high and the date products
and byproducts can no doubt be improved and the product mix more diversified (Sawaya, 2000).
Date palm production is facing serious problems, such as low yields due to the lack of research, the spread
of pests, as well as marketing constraints. Over the last decade, productivity has declined in the traditional
growing areas Pests and diseases have caused significant effects upon date production in the Arab countries.
Rhynchophorus ferrugineus Olivier known as Red Palm Weevil is the most important pest of the date palm
in the world. It is native and has been detected in many countries of southern Asia. Since the 1980s it has
rapidly expanded its geographical range westwards and reached many countries in the Middle East and Europe.
It is present in Egypt, Jordan, Iraq, Palestinian Authority Territories, Kuwait, Bahrain, Oman, Qatar, Saudi
Arabia, United Arab Emirates, Spain France, Italy, Greece and Turkey (Malumphy and Moran, 2009).
Aust. J. Basic & Appl. Sci., 4(8): 3998-4010, 2010
Bayoud disease which is caused by fungus threatens the date palms in North Africa except Tunisia. It has
affected nearly all Moroccan palm groves as well as those of western and central Algerian Sahara; it has killed
more than 12 million in Morocco and 3 million in Algeria and has accelerated desertification (Djerbi, 1998).
Unfortunately, pests and diseases spread increasingly with the expansion of trade and travel in the globalizing
world system (UN Press Release, 2004). In North Africa, date palm cultivation and production are suffering
from different problems but, the main problem is Bayoud disease (Fuzarium oxysporum f.sp. albedinis), which
killed in less than a century more than 13 million trees in Morocco and Algeria. In addition, abiotic stresses,
such as drought and salt and traditional cultural techniques are common problems to the regions (Oihabi, 2001).
Tafilalet Oases, which includes one of the largest palm groves in Morocco, is one of the regions where the
water problem has arisen with the greatest magnitude. This resulted from the development of irrigated acreage
in the entire zone that sharply increased water withdrawals and affected the quantity and quality of groundwater
and surface water, added to the phenomena of drought. Consequently, the number of date palms has decreased
(Babakhouya and Abaouz, 2005).
Unfortunately, the cultivation of date palms, which was considered the main agricultural activity in Kateef
Oasis in Saudi Arabia (as an example), had lost this status at present. This is because of the shortage of
labour; since many of the locals have moved from the area to work in companies and engage in other
commercial activities that pay better salaries (Al-Nimer 2004). Consequently, the costs of date production have
surpasses revenues. At the same time, the export of dates has declined to a minimum. Decrease in the
productive capacity of date palms and the degradation of the quality of production itself are the main indicators
of degradation. Similarly, the possibility to earn an income outside the oasis, have provoked mass migration
to the urban centers of northern Morocco and to Europe. As the majority of these temporary migrants are
young men between the age of 20 and 40, necessary agricultural activities such as soil preparation, selection
and planting out of palm offshoots are hardly executed by many households. The maintenance of date palms
is generally minimized. The result of this neglect is the running wild of the palm-groves, densely grown with
date palms, reducing harvests and, consequently (de Haas, 1998).
In spite of the importance and broad culture areas of conventional date palm cultivation, field and post-
harvest losses are high, and methods for measuring product quality and the use of date products and byproducts
need improvement (Mahmoudi et al., 2008). The export of dates from Algeria is subjected to problems such
as disorganization of the export trade and lack of speed in transferring the dates which is considered a rapid
damage commodity. Therefore, Algeria exports more natural dates than processed dates, as there is a lack of
processing capacity (FAO, 2003).
During the last 50 years, date palm groves have been subjected to degradation due to extensive exploitation
resulting from the increase in both the human population and the number of domestic animals. In addition, the
increased ability of the majority of the population to benefit from opportunities presented by modern
technology has led them to abandon their date palms. Natural factors have also contributed to the degradation
of date palms, such as drought, soil salinity, pests, environmental change, and a decline in the quality of
ground water. In specific cases, wars have brought about tremendous degradation in date palm orchards. For
instance, Iraq used to be a major producer of dates, but in recent years production and exports have been
The main common causes of date palm degradation in the Arab countries are losses of vegetation cover
in some areas due to overgrazing and over-harvesting of wood for fuel, resulting in soil erosion, increased wind
velocity and storm frequency resulting in an increase in the levels of suspended dust in the air, decreased
infiltration of water into soil due to the increase in runoff and floods and decreased water table levels in some
areas, in addition to decline of the quality of ground water resulting in increased soil salinity and loss of
fertility. Increased sand drift and the development of new dune fields in some areas also is a considerable
cause of date palm degradation. Acute shortage of skilled labour with increased wage demands, resulting in
the neglect of many agricultural processes required for proper production. There is a noticeable weakness of
government services for the extension and protection of agricultural activity. Increased infestation of pests and
diseases resulting in a significant decline in the productivity of trees and have contributed significantly in
degradation of date palm in the Arab countries.
The improvement of the current status of date palm cultivation in the date producing countries of the
region and the enhancement of the quality of date products have become critical need that can’t be
overemphasized (Sawaya, 2000).
Although each of the date palm growing country has its list of pests and diseases, however, many of those
are common to all countries. Some of the main insects and fungal diseases which attack date palms and dates
are presented in Table 2 and Table 3.
Aust. J. Basic & Appl. Sci., 4(8): 3998-4010, 2010
Rehabilitation needed:
Having discussed the degradation of date palm in the aforementioned sections, suggesting rehabilitation
of this sector has to be addressed as the following: solve the salinity of water and soil using right management,
establish gene banks for date palm trees, mechanize the cultivation processes, organize training programmes
and workshops for the workers and farmers in all cultivation processes of date palm trees, establish exemplary
date palm orchards, establish databases for date cultivation, marketing and manufacturing, replace overage trees
with new good quality ones and increase the distance between trees.
Table 2: Some of the main insects recorded on date palm in different Arab countries
Common name Casual insect Country
White scale Parlatoria blanchardi Targ. Mauritania, Morocco, Algeria, Tunisia,
Libya,Egypt, Sudan Kuwait, Iraq, Oman, Saudi
Red scale Phoenicococcus marlatti Cockerell Morocco, Algeria, Tunisia, Egypt, Palestine
Territories, Jordan, GCC countries
Boufaroua Oligonychus afrasiaticus McGregor, O. pratensis Banks. Tunisia, Algeria, Morocco, Egypt, GCC
Carob moth Ectomyelois ceratoniae Zeller Morocco, Algeria, Tunisia, Libya, Egypt,
Iraq, Saudi Arabia
Rhinoceros beetle Oryctes rhinoceros L. Tunisia, Egypt, Yemen, Iraq, Qatar, Oman,
Bahrain, UAE
Red palm weevil Rhynchophorus ferrugineus Olivier Egypt, GCC countries, Iraq, Syria
Dubas bug Ommatissus lybicus Bergevin Morocco, Algeria, Tunisia, Libya, Egypt,
Sudan, Iraq, Saudi Arabia
Lesser date moth Batrachedra amydraula Meyrick Libya, Egypt, Palestine Territories, Kuwait,
Iraq, UAE, Bahrain, Saudi Arabia
Table 3: Some of the main fungal diseases recorded on date palm in different Arab countries
Common name Casual fungi Country
Bayoud Fusarium oxysporum f. sp. albedinis, (FOA) Mauritania, Morocco, Algeria
Black scorch Ceratocystis paradoxa (Dade) C. Moreau, Mauritania, Algeria, Tunisia, Egypt, Saudi
Thielaviopsis paradoxa (De Seynes) Höhn Arabia, Iraq
Brown leaf spot Mycosphaerella tassiana (de Not.) Johanson Morocco, Algeria, Tunisia, Egypt, UAE, Oman,
Diplodia Diplodia phoenicum (Sacc) Fawc. & Klotz Morocco, Tunisia, Egypt, Libya, Sudan, Yemen,
Iraq,UAE, Oman, Kuwait, Saudi Arabia
Graphiola leaf spot Graphiola phoenicis (Moug.) Poit. Mauritania, Morocco, Tunisia, Libya, Egypt,
Yemen,Sudan, Iraq, Oman, Kuwait, Saudi Arabia,
Khamedj orInflorescence rot Mauginiella scattae Cav. Mauritania, Morocco, Algeria, Tunisia, Libya,
Egypt, Iraq, Bahrain, Kuwait, Saudi Arabia
Omphalia root rot Omphalia tralucida. Bliss,O. pigmentata Bliss Mauritania
Belâat Phytophtora sp. similar to P. palmivora Morocco, Algeria, Tunisia, Iraq, UAE
Fruit rot Aspergillus niger, Pencellium sp., Algeria, Philistine Territories, UAE,
Alternaria sp., Fusarium sp.
Constraints to rehabilitation:
As the date sectors of all date-producing Arab countries face similar problems, so that constraints to the
rehabilitation of these sectors must also be similar (Ibrahim, 2004) and can be summarized as follows: (1) High
cost of production due to employing manual labour, (2) Insufficient replacement of low-quality varieties with
those of good quality, (3) Weakness of marketing services, (4) Neglect of farmers from achieving post-harvest
processes, (5) Lack of cold stores, (6) An increase in the number of the low quality date varieties, (7) Decrease
in the export volume of dates, (8) Neglect of benefit from accumulative local practical experience in the date
sector, (9) Lack of interest in applied research related to manufacturing dates and their products, (10) An
increase in the costs of storing dates in general and fresh dates in particular due to their need for low
temperature transport means and specialized handling appliances, (11) Reliance of local date manufactures on
governmental authorities for research and development efforts in the manufacturing sector, (12) Increased
supply of dates due to expansion in the cultivation of date palms without any concomitant increase in demand
for the production, (13) Increased losses in dates due to increased infestation of pests and diseases, improper
transporting, handling, and storage that result in increase costs and (14) Neglect of most date producers and
marketers of the marketing opportunities provided by international exhibitions due to the high costs of such
Aust. J. Basic & Appl. Sci., 4(8): 3998-4010, 2010
The following points are suggestions and can be considered as a guideline to work towards strengthening
the date palm industry in the Arab countries and to stop the degradation in their productivity sooner not later.
There is a necessity to establish a database for the cultivation, marketing and manufacture of dates and date
products. Improve the main processes to date cultivation such as propagation, planting of offshoots, irrigation,
fertilization, integrated pest control, pruning, pollination, fruit thinning and harvesting techniques. These
required, in addition to other requirements, enhancing the technical capacity of date palm workers and increase
the research capacity in the field of date palm cultivation.
Regarding the date quality, subsidies should be paid only for good quality varieties of dates, applying
comprehensive quality programmes and establish standard specifications for dates in both local and international
markets in order to improve the economic revenue from production and its quality. There is a need to support
date manufacturing and marketing through establish new date factories and develop existing ones, open new
marketing channels for dates and use the low quality dates in conversion industries. Handling, storage, packing,
transport of dates should be crucially improved. Establishment of cooperative societies for meeting the demands
of post-harvest, preparation, processing and marketing is of a great importance to date palm sector. Finally,
it is necessary to adopt advertising campaigns to promote dates, date products, and their benefits through
different media, including the internet, schools, commercial centers, etc.
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... The fruit produced with the aid of the palm bushes are known as dates, which are the consumed as fruits and were used inside the food processing enterprise to put together the extensive range of merchandise which include date cookies, syrup and paste [4,5]. In keeping with latest reports, there is more 100 e 120 millions date palm tree worldwide, with the middle East and north Africa (MENA) international locations estimated to have extra than 70 e 90% of the share [6]. Historically, the date palm tree and its fruit have been grown and the cultivated as a crop within the MENA area for hundreds of years. ...
... The natural fiber can be in lots of sectors and their programs are developing each day [12]. A number of its utility which can be called are in furnishings, production, motors and so forth [3][4][5][6][7][8][9][10][11][12][13][14][15]. Wooden as engineering fabric has a crucial function in developing and the advanced countries [16]. ...
... According to another findings, the history of date palm tree cultivation was dated back to more than 7000 years back [118]. Based on archaeological findings and data, the cultivation of date palm tree dated back to 5000-3000 BC near the Gulf of Persia and spread throughout the Middle East [124][125][126][127]. The date palm is one of the few trees that can tolerate high temperature, long period without rain (drought), and salinity; this is why the desert regions consider it as a symbol of life [127]. ...
... Based on archaeological findings and data, the cultivation of date palm tree dated back to 5000-3000 BC near the Gulf of Persia and spread throughout the Middle East [124][125][126][127]. The date palm is one of the few trees that can tolerate high temperature, long period without rain (drought), and salinity; this is why the desert regions consider it as a symbol of life [127]. Date palm trees can withstand and grow in any climatic zone as it has a good resistance to bad climatic conditions. ...
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The use of natural fibers in cementitious composites continue gaining acceptability and applicability due to the shortcomings and disadvantages of synthetic fiber; this is because natural fibers have advantages of sustainability, eco-friendliness, and economy. Biodegradable natural fibers, being low density and lightweight, with typical values of strength-to-weight ratio, aspect ratio, elastic modulus, and strength, may be competitive for substituting synthetic fibers such as glass and carbon. Indeed, natural fibers are mostly non-irritating for the skin and typically pose no troubles or issues for breathing, which is not the case with many synthetic fibers. Date palm fiber (DPF) is a natural fiber obtained as waste material from a date palm tree. In many countries, with large date production, DPF is easily available as a process by-product, with a low processing cost. Being sustainable and environmentally friendly, DPF is continuously gaining acceptability as fiber material in different composites such as concrete, mortar, gypsum composites, clay composites, and bricks. Based on the most available literature reviewed, DPF reinforced composites have been found to be a good insulation material, with higher thermal properties, thereby reducing energy consumption which consequently saves the running and maintenance cost of the building. DPF reinforced composites were reported to have higher energy absorption capacity, ductility, and bending resistance, leading to delaying crack propagation and preventing catastrophic failures of structures such as beams and slabs. Additionally, due to its lower density, DPF reinforced composites have the advantage for usage in areas prone to seismic effects, and when used for buildings, the overall weight of the building is expected to reduce hence reduction in foundation cost. The major setback of using DPF in composites is the reduction in the compressive strength of the composites and the durability performance of the composites. Therefore, for effective usage of DPF in composites to derive the maximum benefits, there is a need to devise a method of mitigating its negative effects on the compressive strength and durability performance of the Composites; this is a future study that needs to be explored for better performance of DPF in cementitious and other materials composites.
... Thus, the rehabilitation of this valuable resource is becoming an emergency for all Arabian countries and requires more collaborative efforts, networks, and dedicated funds. In this respect, several recommendations, like genetic conservation, integrated bio-control approaches, sustainable farming procedures, the best way of processing technologies, valorization techniques, and better marketability of the fruit are recommended (El-Juhany, 2010;Johnson et al., 2015a,b). Of which, RPW, identified as the synonym Rhynchophorus vulneratus (Hallett et al. 2004), was confirmed as a dangerous fast-evolving species (Rugman-Jones et al., 2013;Sukirno et al., 2018a,b). ...
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The study aims at detecting and characterizing haplotypes of red palm weevil (RPW) Rhynchophorus sp. in the Western region of Saudi Arabia based on the cytochrome oxidase subunit I (COI) gene sequence. The results indicated the occurrence of 17 nucleotide substitutions, of which three were nonsynonymous (NS). These three NS substitutions resulted in the variation in amino acid sequence in three positions, out of 133. These amino acids are isoleucine/valine, glycine/serine, and arginine/histidine. Based on the chemical properties of the cytochrome C oxidase (COX) enzyme, it is likely that the change at the first position has no effect, while changes at the other two positions can affect the chemical properties of the enzyme. At the three-dimensional (3D) level, the first two positions exist at the border or inside loop 3–4 of the enzyme, while the third position exists inside loop 4–5. These two loops influence the folding pattern of the enzyme, thus, likely affecting the function of the enzyme. However, it is unlikely that variations in the three positions will affect the binding ability of the heme group, which promotes the action of the COX enzyme in the electron transport chain. Variations in chemical properties and 3D structure of COX enzyme might be an evolutionary process (positive selection) that promotes in-time and in-site adaptation to the insect. In conclusion, this study can be helpful in pest management programs and in tracing RPW geographic spread and migration in Saudi Arabia.
... Date palm grows in warm weather countries and has a tall trunk with a mass of long pointed leaves at the top [1]. Egyptian people use the parts of date palms in many things, like using palm leaflets in plaited cradle [2]. Nowadays date palm plantations are spread out all over country; wherever water is available. ...
Goal: This paper focuses and outlines the utilization of palm leaflets in making modern crafts and accessories in a creative way (“out of box”) and at the same time following the international fashion trends. This utilization can result in benefits like achieving added economic value in two ways: creating trendy modern fashionable crafts and achieving the concept of “zero waste”. Palm leaflets can be mixed and matched with fabrics and leather waste according the design idea. By using techniques of textile printing and dyeing to create more attractive designs according the trend, which can be employed in the palm leaflets and fabrics, a variety of innovated designs are created and can be applied in modern crafts according the international fashion trends for making accessories according the season. Also, dyed palm leaflets are mixed and matched with printed fabrics and leather wastes generating very unique up-cycled products in modern crafts and fashion accessories. At the end, a boxy bag prototype is implemented according the proposed outlines as a final product made from woven leaflets mixed with waste of fabrics and leather up-cycling. The main purpose of this paper is to highlight making fashionable accessories products according to the international fashion trends using mixed media as up-cycling product from (printed & dyed palm leaflets according the color of the season), waste of fabrics and waste of leather.
... All the crops rely primarily on the blue water of the study area, except for wheat and barley which are winter crops and partially lower the blue water share. Ewaid et al., [89] study's results indicate that the WF for Iraqi rice in 2017 was 3091 m 3 /ton, higher than the world average (1325 m 3 /ton). Approximately 821,737,881 Mm3/yr of water have been used to irrigate rice-growing areas to generate 265,852 tons, green WF is nearly non-existent as rice grows in the dry and hot season, and the blue WF is dominant. ...
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Rapid urbanization, pollution, and increasing water consumption together with climate change necessitated to process of more effective measurement, management, and decision mechanisms on regional water resources. The concept of water footprint (WF) is a parameter that has been introduced to the scientific literature in recent years similar to the ecological and carbon footprints. The WF of any field or product refers to the total volume of water resources that are processed or contaminated directly or indirectly during the production process. The current work is the first study assessing and discussing the agricultural water footprint of an Iraqi governorate by analyzing blue and green WFs of agricultural production in Qadisiyah governorate, southern Iraq for 2010-2020. Recently developed WF methodology has been used. The blue and green evapotranspiration amounts were estimated by the crop water requirement (CWR) option in CROPWAT 8.0 software. The statistical data including meteorological data, rainfall statistics, local crop coefficients, cultivation area, crop production amounts and animal statistics data have been utilized. The average annual agricultural WF of Qadisiyah governorate for the 10 years between 2010-2020 was determined to be 1,315,201,621 Mm ³ /yr. The largest water-consuming sector is crop production (54%). Cereal and feed crops are the main component of water consumption. The rice crop followed by wheat is the primary crop production comprising about 44% of the total WF and require water supplied from rivers. Vegetable production has only 14% of the crops WF. The green WF was only 15% of the crop production WF. The largest share of water used for animal production is related to broiler chickens (44%) and 37% for dairy cattle. The study area is fertile land for crop production. However, limited water resources and scarcity of the region restrict the agricultural activities. The sustainability of freshwater resources of the governorate could be provided by reducing the WF and blue water contents. This study is expected to contribute to the national authorities to develop more accurate irrigation water management policies.
... En Tunisie, en particulier dans les régions du sud, la culture de palmiers dattiers joue un rôle très important, tant sur le plan socio-économique que sur le plan écologique (El-Juhany, 2010). Le palmier dattier représenté essentiellement par la variété « Deglet Nour » constitue la principale culture oasienne occupant à lui seul l'étage supérieur. ...
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In Tunisia, particularly in southern regions, the culture of date palms plays an important role, both at socioeconomic and ecological levels. In spite of its importance, this agro-system is still threatened by many species of insects and diseases. Among these phytosanitary problems figure the exotic pest Oryctes agamemnon. This insect causes severe damage on palm tree mainly on the collar and the root system. The aim of this work is to study some parameters of the biotic potential of the insect. A number of ten couples were used in this survey. Follow-up of the experiment under the following conditions (Relative humidity = 40 +/- 6%, Temperature = 28 ° C +/- 2 ° C and a photoperiod: 16/8) allowed to study the reproductive potential, the larval survival rate and the adult lifetime. The follow-up of the experiment shows that the average pre-oviposition period and the average post-oviposition period are 25.3 ± 9.85 and 7.3 ± 5.39 days, respectively. The developmental cycle comprises, the egg, 3 larval stages L1, L2 and L3, prenymph and nymph respectively lasted 13,742 ± 2,011 days, 26,591 ± 3,142 days, 43,361 ± 3,237 days, 137,047 ± 6,132 days, 7,487 ± 0,909 days and 21,390 ± 2,655 days. Survival rates for the various stages ranged from 83.631 to 93.886%. Adults lived on average 55.18 days for males and 60 days for females. The average number of eggs laid per female was 28.7 ± 17.13 with an average fertility rate of 81.184%.
... The most important pests include Old World Mite Oligonychus afrasiaticus, the date palm scale insect Parlatoria blanchardi, the palm butterfly Myeloïs Ceratoniae and fungal diseases such as rot disease flowering (raw) caused by the fungus Mauginiella scaeta and Bayoudh diseases Fusarium oxyusporum f.sp. albedinis, which has spread to Morocco and Algeria, causing the destruction of 3 million palm trees in Algeria (Bounaga and Djerbi, 1990;El-Juhani, 2010). The protection of the date palm crop is vital both for the livelihood of the people as well as the economy of the country especially the residents of Bou-Saada where the crop is facing serious threats due to the attack of the above-mentioned insect pests as well as polluted irrigation water. ...
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The Oasis of Bou-Saada is gradually deteriorating due to the attack of insect pests such as white scale Parlatoria blanchardi Targ., the palm worm Myeloïs ceratoniae Zell and some fungal pests. In addition, polluted irrigation water coming from the wadi Bou-Saada has seriously damaged the oasis palm. Consequently, 23 promising date palm varieties are facing extinction. The Rehabilitation of the oasis palms of Bou-Saâda requires mass propagation of the endangered date palm varieties to conserve the fauna and the genotypes. The Tissue Culture technique is the only method through which date palm oases Bou-Saâda can be restored in a short period as compared to growing the trees through seeds or offshoots. As the first phase of conservation of the oases, this research project was initiated whereas propagation of two highly promising varieties Deglet-Nour and Mech-Degla was carried out through tissue culture technique on MS medium using various concentrations of three different hormones (AIB, GA3, 2,4-D) to obtain organogenesis. Results revealed that the growth in length of explants of the variety Deglet-Nour and its overall development was better as compared to the variety Mech-Degla with the AIB (2mg/l). The GA3 hormone performed the best in relation to the development of organogenesis in the two varieties followed by AIB hormone than the 2,4-D with overall mean lengths of 1.36, 1,26 and 0.84 centimetres, respectively. The formation of the callus was noticed only in the case of the variety Deglet-Nour.
Red palm weevil (RPW), Rhynchophorus ferrugineus (Olivier) (Coleoptera, Curculionidae), is a devastating invasive pest, that invaded Saudi Arabia's date palms in 1987. Evaluation of the infestations and the efficacy of both preventative and control treatments have been studied from 2015- 2020 in Qassim. The results indicated that the number of infested date palms varied according to the years and locations. The infested date palm trees percentage was relatively high in 2016 (2.24%) and 2017 (3.19%), then gradually decreased to reach its lowest in 2020 (0.73%) due to the management protocol applied by the Ministry of Environment, Water, and Agriculture. Furthermore, the infested palm trees' percentage varied among the eight study locations, reaching the highest percentage in location G (SA7) with a general average of 4.31%. While in the other locations, the general infested percentage average was very low when compared to location G (SA7) with 1.21 and 0.47% in locations A (SA1) and H (SA8), respectively. The effectiveness of control methods increased sharply from 52.141% in 2015 to 90.0% in 2020 with a general average of 72.73%. The quarantine and management protocols of R. ferruginous applied in Qassim decreased the number of palm infestations. Contrary, the intensive use of insecticide in the last two decades promoted genetic mutations within the Rhynchophorus, which led to the emergence of a new species R. bilineatus. This leads to increase pesticide pollution, and control costs and the insect becomes more resistant to pesticides.
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This study aimed to investigate the impact of adding Zahdi date juice on the physicochemical characteristics and microbiological analysis of bio-yogurt with a probiotic starter (St. thermophilus, Lb. acidophilus, and B. longum) and haematological parameters in mice. The bioyogurt was prepared by adding a 5% probiotic starter supplemented with date juice at 2, 5, and 10% (v/v). Hematological parameters: Mice (n = 30) were divided into five groups (Tc, T1, T2,T3, and T4) and treated with either a standard diet or a standard diet enriched with 3 ml/day of bio-yogurt containing 0,2, 5, and 10% date juice for 30 days. The results showed that the addition of date juice increased the acidification rate, decreased pH values, and improved the syneresis of bio-yogurt. During the 21-day period, the viability of probiotic bacteria decreased, but a bio-yogurt sample containing 10% date juice had a higher number of probiotic bacteria than the other samples. The diet and body weight of the mice were affected by the daily administration of bio-yogurt or bio-yogurt with date juice. In addition, the groups treated with bio-yogurt, including date juice, typically had superior haematological parameters and better immunity levels than other groups (P≤ 0.05). Compared with the control group, mice administered bio-yogurt containing date juice showed reduced total cholesterol and triglyceride levels. In conclusion, the addition of date juice to the bio-yogurt improved the physicochemical properties and increased the viability of probiotic bacteria as well as improving the blood parameters of experimental animals.
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Adsorption of heavy metals by affordable adsorbents has recently become one of the most often applied method for removing these metals from contaminated water. The purpose of this study was to evaluate the efficacy of using raw date nuclei (RDN) as a natural and inexpensive adsorbent to remove Zn ions from contaminated water and reduce its impact on water quality, Zn bioaccumulation levels in fish organs, growth performance, and some physiological aspects of common carp (Cyprinus carpio) under sublethal concentrations. Five experimental groups were examined for eight weeks; CNT, control group rearing in clean water; RDN 0 , fish group rearing in Zn-contaminated water; RDN 3 , fish group rearing in Zn-contaminated water and treated with 3 g RDN/L; RDN 4.5 , fish group rearing in Zn-contaminated water and treated with 4.5 g RDN/L; RDN 6 , fish group rearing in Zn-contaminated water and treated with 6 g RDN/L. Water quality measures were monitored in a continuously manner without removing fish excreta or renewing water. The results showed that sublethal concentration of Zn alone significantly elevated the level of antioxidant biomarkers (SOD, superoxide dismutase; GST, glutathione trans-ferases; GPX, glutathione peroxidase; CAT, catalase and MDA, malondialdehyde), significantly declined fish performance, increased Zn-accumulation in fish organs (gills and flesh) and increased the ammonia secretions in fish ponds compared to the control group. Zn concentrations in RDN-containing aquariums were significantly lower than in RDN-free aquariums, and Zn removal from polluted water was dependent on RDN dosage. Consequently, fish performance and serum bio-indicators enhanced in the presence of RDN in a fish group reared under sublethal Zn concentrations. In conclusion, although Zn caused toxicity in C. carpio at sublethal levels, treating Zn-contaminated water with RDN at a dosage of 6 g per liter effectively prevented oxidative stress and the harmful impacts of Zn exposure.
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While date palm is affected by many diseases, bayoud remains the most serious one. It is caused by a soil born pathogen, Fusarium oxyspurum f .sp. albedinis. It has affected practically all Moroccan palm groves as well as those of western and central Algerian sahara, where it has respectively killed more than 12 million in Morocco and three million in Algeria and has accelerated the desertification phenomenon. External and internal symptoms as well as identification methods of F.o. f. sp. albedinis by pathogenicity test, cultural characteristics, and vegetative compatibility were reviewed and discussed. Small distance contamination occurs by root contact between diseased trees and healthy ones, and at large distances through the movement of contaminated planting material (offshoots, symptomless carriers) and infested soil and irrigation water. Prophylactic measures as well as chemical, cultural, biological and genetic controls were reviewed. It appears that the most productive mean lies in research into resistant cultivars. Hundreds of genotypes have been selected and introduced for micro-propagation and planted in infested areas to rehabilitate date palm oasis ravaged by bayoud. Among other date palm diseases Khamedj (Mauginiella scaettae), fruit rot (due to numerous fungi), Black scorch (Thielaviopsis paradoxa), Belaat (Phytophtora sp.) are of minor importance and of sporadic occurrence. However, they become serious and cause heavy losses under favorable conditions and when proper sanitation is not applied. Two serious and fatal diseases of unknown causes (AI Wijam and the Brittle leaf disease) as well as many other diseases and physiological disorders of minor importance were also reviewed.
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Thirty vegetative date palm (Phoenix dactylifera L.) descriptors were screened. This selection was made on three cultivars with variable behaviour towards oasis stress: Deglet nour, Alig and Kintichi. The statistic tests showed an intra-cultivar stability of 6 characters: percentage of spinned midrib part, apical divergence angle, maximal pinnae width at the top leaf, percentage of solitary spine, spine length at the middle and maximal spine angle. These characters are steady; their measures are not affected by the change of cropping conditions. So they can be used for cultivars identification in any oasis and outside the fruiting period. Using these parameters, the genetic variation among 26 Tunisian date palm cultivars was studied. The graphic distribution identified by principal component analysis showed cluster according to fruit characteristics. We have distinguished a grouping of later maturity date palm varieties which opposed to those with earlier maturity. The Pearson coefficient showed significant correlation between the harvesting period and the percentage of spinned midrib part which can be used as an indicator of the cultivar maturity period. In addition, cultivars with the same fruit consistency are grouped together. These results are useful in the selection, collections and genes mapping.
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Brittle leaf disease of date palms", known in south- ern Tunisia since the 1960s, has assumed epidemic pro- portions from 1986 on. The symptoms are associated with manganese deficiency and the presence of a small double stranded RNA of host origin. Even though no pathogen has yet been found, some observations do not fit a purely abiotic cause of the disease. In particular, af- fected trees seem to cluster into foci, and mineral analy- ses show no significant differences between the soils of affected and unaffected trees. Further work is required to understand the etiology of the disease.
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Although the processing, marketing and pest control challenges of date palm have been discussed in many conferences and symposia, little attention has been paid to the particular challenges for its organic production and handling; especially those affecting conventional producers faced with land degradation, biodiversity loss and pollution and who are in transition to organic systems. Although organic farming is being promoted as an environmentally-friendly approach in most developed countries, there has been little consideration for developing countries, which are the main producers of dates. In this article we will examine the potential benefits, and processing, marketing and pest control challenges, associated with organic date palm production.
-Egypt is at the second place in the world concerning the production of dates. The date palm tree is also present in all the cultivated areas of the country. However, a new policy for the development of the date palm sector has to be established to face the future needs in relation to the demographic growth. RESUME -"Le secteur phoenicicole en Egypte". L'Egypte est le second producteur de dattes dans le monde. Le Palmier dattier y est en outre présent dans toutes les zones cultivées du pays. Cependant, une nouvelle politique de développement du secteur phoenicicole doit être établie pour faire face aux besoins futurs liés à la croissance démographique. Mots-clés : Egypte, palmier dattier, production dattière, politique de développement.