Muwaffaq Karajeh

Muwaffaq Karajeh
Mu’tah University · Protection and Integrated Pest Management

PhD in Plant Pathology- Nematology, M.Sc. in Fungal Plant Diseases

About

29
Publications
10,743
Reads
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226
Citations
Citations since 2016
3 Research Items
153 Citations
2016201720182019202020212022051015202530
2016201720182019202020212022051015202530
2016201720182019202020212022051015202530
2016201720182019202020212022051015202530
Additional affiliations
August 2015 - August 2016
Mu’tah University
Position
  • Head of Department
January 2001 - May 2017
Mu’tah University
Position
  • Professor

Publications

Publications (29)
Article
Full-text available
Organic grapes are increasingly traded internationally. The main principle of organic grape production is the avoidance of synthetic pesticides to protect fruits from pests and diseases. As a physical control measure, cluster bagging with different types of bags was evaluated under field conditions. Cluster bagging, with or without pesticide treatm...
Article
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To investigate the influence of deficit irrigation on the root-knot nematode, Meloidogyne javanica, and its interaction with the eggplant crop, field experiments were conducted at two drip-irrigated agricultural areas in Jordan. Effects of limiting irrigation levels to 80, 60, 40 and 20% of the field capacity (FC) were compared with full irrigation...
Article
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Fruits of three apple cultivars; Golden Delicious, Granny Smith and Fuji were inoculated with blue mold, Penicillium expansum, and kept under cold storage conditions for 75 days after treatment with non-chemical alternatives and the fungicide Topsin as a standard. This aimed at providing new postharvest methods for the control of blue mold incidenc...
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Olive is the most widely grown fruit tree in Jordan; it is annually attacked by the olive fruit fly, Bactrocera oleae (Rossi), whose larvae usually cause great economic losses in fruit yield. Alternaria solani, Aspergillus niger, Cladosporium herbarum, Fusarium solani, Penicillium digitatum, P. italicum and Rhizopus stolonifer were found associated...
Article
Full-text available
Root-knot nematodes, RKNs (Meloidogyne species and races) are widely distributed throughout the irrigated agricultural areas in Jordan which differ in their environmental conditions. In this study, host plant range of local populations of RKNs was revised in Jordan and new host samples were collected from some agricultural areas. Thirty one plant s...
Article
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Influence of different nitrogen salts at electrical conductivity levels (EC2, 4 and 8 mmhos/cm) on tomato and root-knot nematode (Meloidogyne javanica) and their interactions was evaluated under field conditions. It was found that both diammonium phosphate ((NH4)2HPO4) and ammonium sulphate ((NH4)2SO4) were more effective than ammonium chloride (NH...
Article
Full-text available
Deficit irrigation has been widely investigated as a valuable strategy for dry regions where water is the limiting factor in crop cultivation. Soil moisture can be one of the important factors that influence root-knot nematode (RKN) disease development. To determine how different levels of irrigation can affect disease development, irrigation regim...
Article
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To control blue mold of apples caused by Penicillium expansum after harvest and during commercial cold storage, microwave exposure was investigated as a physical measure and compared with the use of calcium chloride and the systemic fungicide, carbendazime. Microwave exposure of Golden Delicious and Royal Gala apples at 2450 Mhz for 10, 30 and 45s...
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Effects of the yeast fungus Saccharomyces cerevisiae on tomato cv. Asala and its interaction with the root-knot nematode Meloidogyne javanica were evaluated under field conditions. The yeast was equally effective as the reference nematicide (a.i. oxamyl). It was more effective than hydrogen peroxide when applied as a rhizospheric soil drench leadin...
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Saccharomyces cerevisiae is a promising plant growth-promoting yeast for different crops. Applicability of S. cerevisiae as a biocontrol agent of the root-knot nematode (Meloidogyne javanica) was investigated on cucumber under growth-room and field conditions. The yeast S. cerevisiae similar to the nematicide, Ethoprophos, when applied as a rhizosp...
Article
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Fragaria×ananassa, is consumed fresh or used in making deserts and in food processing due to its high nutritive value. Thus, production practices for this crop have to be improved to meet the increasing demand for its fruits. A field study was carried out during 2010-2011 at Far ah Private Farm, 25 km from M^am city in the southern part of Jordan t...
Article
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The infl uence of diff erent nitrogen containing salts and sodium chloride at gradual electrical conductivity levels (ECs 2, 4, 6 and 8 mS/ cm) on the root-knot nematode (Meloidogyne javanica) and their interaction with tomato was evaluated under growth chamber and greenhouse conditions. Both ammonium chloride (NH4Cl) and ammonium sulfate ((NH4)2SO...
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Aimed this study to assess the knowledge levels of tomato growers’ in Southern Jordan Valley in tomato diseases, and to identify the relationship between knowledge levels and some independent variables. The study covered a random sample of 150 tomato growers in Central Jordan Valley. Data collected through personal interviews with farmers by using...
Article
Full-text available
The influence of different nitrogen salts at five electrical conductivity levels (EC 2, 4, 6 and 8 mmhos/cm) on the Javanese root-knot nematode (RKN) (Meloidogyne javanica) and its interaction with cucumber was evaluated under in vitro, growth chamber and greenhouse conditions. Percentages of egg-hatching and second-stage juvenile viability of M. j...
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Powdery mildew of strawberry caused by the fungus Sphaerotheca macularis f. sp. fragariae was found in Al-Shoubak area under glasshouse conditions. White superficial fungal growth was more abundant on the lower than the upper leaf surface and no cleistothecia were noticed on any plant parts. Top leaves were more susceptible than middle or bottom le...
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The reaction of five apple cultivars to olive wilt caused by Verticillium dahliae Kleb was evaluated. Five apple cultivars (Royal Gala, Delicious Anabri, Double Red, Golden Delicious, Granny Smith) and one olive cultivar (Nabali Mohassan) were inoculated with V. dahliae and grown under partially controlled greenhouse conditions. Typical symptoms of...
Article
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An extensive field survey of plant-parasitic nematodes associated with most of field and vegetable crops and fruit trees was conducted in most of the irrigated and rainfed agricultural areas of Karak Province of Jordan during 2007-2009. Several species of plant-parasitic nematodes were recorded. The most important species were root-knot nematodes (...
Article
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Eleven barley (Hordeum vulgare L.) landraces and 12 wild barley (H. spontaneum) populations, collected from diverse eco-geographical regions of Jordan, were screened for resistance to powdery mildew. The average powdery mildew disease score (based on a 0 to 4 severity scale) was <1 in all tested barley landraces. Disease scores in wild barley popul...
Article
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Interaction of Root-Knot Nematode ( Meloidogyne Javanica ) and Tomato As Affected By Hydrogen Peroxide The effect of hydrogen peroxide (H 2 O 2 ) on root-knot nematode (RKN, Meloidogyne javanica ) in tomato was investigated. Soil drenching with exogenous H 2 O 2 was done using seven H 2 O 2 concentrations (1, 10, 100, 250, 500, 750 and 1000 mM) at...
Article
Full-text available
Jordan Journal of Agricultural Sciences, Volume 4, No.4, 2008 -335- Effect of Post-Planting Soil Solarization and Solar Chamber on Verticillium Wilt of Olive Muwaffaq R. Karajeh*􀀍 and Ahmad M. Al-Raddad Al-Momany** ABSTRACT The objective of this experiment was to determine the effectiveness of single post-planting soil solarization and solar chambe...
Article
To test and compare the sensitivity of single and nested PCR-based assays with a standard plating procedure in detecting the infection of Verticillium dahliae, especially in asymptomatic olive trees at different tree heights, two symptomatic and two asymptomatic V. dahliae-infected trees were sampled during the period of the minimal V. dahliae acti...
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To determine whether the spread of Verticillium dahliae to new olive growing areas can be seed-borne, fruit samples of V. dahliae-infected symptomatic and asymptomatic trees of two olive cultivars (Shimlali and Nabali) were randomly collected in November and December 2003 from two olive-growing areas in Jordan. Seeds were excised from the fruits an...
Article
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Three species of root-knot nematodes, Meloidogyne javanica, M. incognita races 1 and 2, and M. arenaria race 2 occur in Jordan. These species and their races were identified using morphological characters, the North Carolina differential host test, and SCAR-PCR. The virulence of 83 isolates belonging to Meloidogyne species and races was assayed. Th...
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Meloidogyne arenaria (Neal) Chitwood (race 2) is reported for the first time in Jordan. The nematode populations were recovered from several vegetable crops, including tomato (Lycopersicon esulentum Mill), squash (Cucurbita pepo L.), cucumber (Cucumis sativus L.), and bean (Phaseolus vulgaris L.), at Dier Alla in the northern area of the Jordan Val...

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