Ravindra C JoshiUniversity of the South Pacific | USP · School of Agriculture and Food Technology
Ravindra C Joshi
Doctor of Philosophy
About
78
Publications
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Introduction
Ravindra C Joshi currently works at the School of Agriculture and Food Technology, University of the South Pacific. Dr. Joshi does research in Entomology, Ecology and IPM. His current projects are 'Invasive alien species in agroecosystems'.
Skills and Expertise
Additional affiliations
June 2015 - present
University of the South Pacific, Fiji/ Pampanga State Agricultural University, Philippines
Position
- Professor
Publications
Publications (78)
The black ant, Dolichoderus thoracicus (Smith) offers a promising, sustainable solution to control the cocoa pod borer (CPB), Conopomorpha cramerella Snellen. Traditional insecticides are ineffective and disrupt cocoa ecosystems, highlighting the need for alternative methods. This five-year study evaluated the efficacy of twelve artificial nest des...
In the Philippines, the Fall Armyworm (FAW) was initially documented infesting corn in June 2019 and rice in May 2021. Relying on commercially available insecticides as the primary, if not exclusive, management strategy raises concerns about potential issues arising from FAW developing resistance to these chemicals, and the associated risks these i...
Fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) is a global invasive pest of corn, and is also common on sorghum, rice and millets, and is reported to be a larval host of 353 cultivated and uncultivated plants . FAW, a native to the tropical and subtropical regions of north, Central, and South America, continues to...
The egg-larval parasitoid on fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) have not reported in the Philippines. This paper summarizes the global biological information on two species of Chelonus and their role in the regulation of FAW. The FAW egg masses and larvae were collected in the corn plantations inside th...
Apitherapy, the utilization of honeybee products such as propolis, bee venom, honey, and bee wax for medicinal purposes, boasts a rich history deeply rooted in traditional medicine across
diverse cultures worldwide. Among these products, propolis, a natural resinous gathered by honeybees from tree buds or sap flows, has been popular in traditional...
The polyphagous fall armyworm (FAW), Spodoptera frugiperda, threatens major crops in the Philippines, particularly corn, and recently expanded to rice. This study investigated FAW occurrence and weed communities in rice and non-rice ecosystems across Pampanga, Pangasinan, and Tarlac from January 2021 to October 2022. A survey identified 70 weed spe...
Background: The fall armyworm (FAW) was first reported infesting corn in the Philippines on June 2019 and rice on May 2021. With the use of commercially-available insecticides as the primary, if not sole management strategy, future problems on insecticide resistance of FAW and the hazards that these chemicals may pose to non-target organisms and en...
Earthworms are beneficial to the soil ecosystem as they help modify the physical, chemical, and biological properties of the soil. These organisms recycle and decompose organic materials, turning them into compost fertilizers. Their continuous burrowing into the soil improves the soil structure. Earthworm castings contain high amounts of nitrogen,...
The occurrence of the invasive apple snail Pomacea canaliculata in Indonesia was first reported in 1984. The species was introduced as an ornamental aquarium pet. Since then, people have begun to culture the snail in ponds usually adjacent to rice fields. When it was realized that the species multiplied rapidly and was a serious pest, this invasive...
Southeast Asian apple snails, Pila spp., have been declining since the introduction of globally invasive, confamilial South American Pomacea spp., yet Pila ecology remains poorly studied, with most occurrence records unconfirmed. Pila scutata, a previously widespread species, presumed native to the Malay peninsula and assessed as Least Concern in t...
Tamarind (Tamarindus indica L.), native to Eastern Africa, is now naturalised in Asia, and Central and South America. Thus, it has become an economically important species not only in Africa, but also in Asia and America to address food, nutrition, economic and climate change insecurities. Tamarind is a multipurpose tree: its leaves, roots and imma...
Literature review of the rice leaffolder, C. medinalis
Literature of rice leaffolder, C. medinalis
A chronological review of the biological control agents of rice leaf folder, Cnaphafalocrocis medinalis Guenée, including the stage of host attacked in different countries, their activity and suggestions for future. The rice leaf folder, Cnaphalocrocis medinalis Guenée, which was a pest of minor importance till the last decade, recently has assumed...
Bibliography of the whorl maggot, H. philippina
ID of variteies of rice with resistance to the RLF, C. medinalis.
Recent advances in marketing and the availability of agricultural inputs have played an important role in the intensification of agriculture in the Southeast Asia region. However, to what extent current practices are sustainable is a complex issue. This study documents some of the current Good Agricultural Practices (GAP) in the region, including t...
Apple snails, family Ampullariidae, are so called because many species, notably in the genera Pomacea and Pila, bear large, round shells. Pomacea species are native to South and Central America, parts of the Caribbean, and the southeastern USA, while Pila species are native to Africa and Asia. In the year 2000, one species of apple snail, Pomacea c...
Liriomyza huidobrensis (Blanchard) is native to South America but has expanded its range and invaded many
regions of the world, primarily on flowers and to a lesser extent on horticultural product shipments. As a result
of initial invasion into an area, damage caused is usually significant but not necessarily sustained. Currently, it
is an economic...
Moringa oleifera Lam., native to the India-Pakistan-Nepal
borders, is widely cultivated in other parts of both the old- and
new-world tropics, including Asia, Africa and South and
Central America. Moringa is a multi-purpose tree: its leaves,
roots and immature pods are consumed as vegetables. All
parts of the Moringa tree – bark, pods, leaves, nuts...
The golden apple snail (GAS) Pomacea canaliculata is the dominant aquatic gastropod and a major rice pest in many Asian countries. We review GAS invasions and synthetic and natural products for its biological and chemical control in wetland agricultural systems.
The apple snails of the genus Pila (Ampullariidae) are the largest freshwater gastropods in Southeast Asia (SEA), and include some of the earliest taxa described from the region; Linnaeus described Pila ampullacea in 1758. Other Pila species have been described from SEA since the 1800s, but their taxonomy remains confused, obscuring the true distri...
1.0 L ha-1 0.3 c 1.5 c 7.3 b 2.0 c 7.2 c 1.5 b 6.7 d 6.7 c 6.7 c 7.7 d (niclosamide 250 EC) Untreated - 10.5 a 19.7 ab 33.5 a 35.0 a 83.2 a 12.0 ab 69.2 a 72.5 a 84.5 a 92.0 a (no fertilizer, no molluscicide)
The Golden Apple Snail (GAS), Pomacea canaliculata Lamarck is considered as one of the most destructive pest of the rice agricultural system in the Philippines. Populations of this gastropod pests are exposed to varying management approaches, and hence, to different selective pressures. Thus, this study was conducted to determine inter- and intra-p...
A survey of the knowledge, attitudes and practices (KAP) of 100 rice farmers and 50 coconut farmers was conducted in the coastal lowland agro-ecosystems of the Sierra Madre Biodiversity Corridor, Luzon, Philippines to identify current rodent management practices and to understand the extent of rat damage and the attitudes of farmers to community ac...
The Philippine rice field rat, Rattus tanezumi Temminck, is one of the principal pre- and postharvest pests of rice and other agricultural crops. This species usually thrives in lowland and upland rice fields but can also be found in or near places of human habitation. They damage agricultural crops and also serve as reservoir hosts for diseases of...
Aspects of biology, ecology and parasitization of the African rice gall midge (ARGM), Orseolia oryzivora Harris and Gagné, were studied in the greenhouse and in the field in 1991 growing season in south east Nigeria. ARGM eggs hatched in 3 days and development (egg-adult) was completed in 26 days. About 1/3 of the eggs laid by mated females failed...
Apple snails (Ampullariidae: Pomacea) native to the New World have become agricultural and environmental pests widely in southern and eastern Asia since their introduction in about 1980. Although their impacts have been extensively documented, considerable confusion persists regarding their identities and geographical origins. Efforts to resolve th...
A novel product for managing Pomacea canaliculata, golden apple snail (GAS), containing quinoa saponins (Chenopodium quinoa), was evaluated under laboratory conditions for the protection of newly sprouted rice seeds. Experimental methods mimicked conditions found in direct-seeded rice cultivation in the Philippines, but with a very high GAS density...
This book explores how far we have come along the road to sustainability in
both pest management and conservation of Philippine rodents. It is a scientific story
far from complete, and every chapter points to the need for more detailed scientific
studies on everything from parasite transmission from rats to humans, the social
ecology of cooperation...
We investigated the species diversity and habitat use of rodents in the Ifugao Rice Terraces (IRT), Luzon, Philippines, as a first step in their assessment either as pest species of rice or as potential non-target species of rodent control practice. Trapping was carried out in caneland and forest habitats adjacent to rice cropland using trap lines...
The golden apple snail Pomacea canaliculata (Lamarck) is native to South America. It was introduced to farmers in the Philippines in the 1980s from Argentina via Taiwan, and to other countries in Asia, to increase farmers' income and enrich the protein in their diet, and also as an aquarium pet. Golden apple snail is expanding its distribution in A...
Golden apple snail (GAS) history, taxonomy, control efforts, and country by country status in 2006, including South and Southeast Asia and Hawai'i.
The rice terraces of Banaue and Hungduan, Ifugao Province, Philippines, are a unique agricultural system in the Southeast Asian context. The terraces typically scale the lower and middle slopes of an extremely rugged landscape in which valley floors lie at 900 m and local peaks rise abruptly to heights of 1050 m. The landscape presents a complex mo...
Four commercial molluscicide formulations were re-evaluated for their efficacy on the golden apple snail (GAS), Pomacea canaliculata (Lamarck), during the dry and wet seasons of 2000: niclosamide 250EC, metaldehyde 75WP, metaldehyde 300FL, and metaldehyde 6% pellets. Field experiments in Muñoz, Nueva Ecija in the Philippines using microplot techniq...
Proportions of rice tillers damaged by the stalk-eyed fly (SEF), Diopsis longicornis Macquart, were statistically analysed for nine sampling periods (rice growth stages) to determine the optimal sample size for use in damage assessment in the future. The major variation (>90%) in the proportion of damaged tillers was attributable to differences bet...
Rice insect pest management in Nigeria is compartmentalized; literature documenting the status of research on the biology and significance of insect pests and on their management, has therefore been reviewed. A holistic, broadly based, multidisciplinary pest-management research approach is suggested. Because of the immense benefits that integrated...
The African rice gall midge, Orseolia oryzivora Harris and Gagné has become one of the major biotic constraints to rice production in Nigeria. A survey of gall midge distribution in Nigeria showed that the pest was common in the savannah and forest zones on rice grown under lowland ecologies. Endemic areas were identified which could serve as ‘hot...
The rice leaffolder, Cnaphalocrocis medinalis (Guenée) (Pyralidae: Lepidoptera), has recently emerged as an important insect pest of rice in many Asian countries. Because of the economic importance of the insect and the difficulty of controlling it with insecticides, incorporation of natural resistance to C. medinalis is essential. Literature docum...
This bibliography on rice leaffolders contains 886 published and unpublished references for the period 1854 to June 1987. References are arranged alphabetically by the name of author and also classified by subjects. A distribution map, tables of alternate host plants, outbreaks, resistant rice varieties, resistant wild rices, natural enemies and de...
Yield losses from insect pests were determined by the insecticide check method in 60 crops in the Philippines from 1976–1986 in three rice environments with traditional and modern cultivars in 10 sites. Plot size of 100 m2 minimized interplot interference from insecticide protection on untreated plots. Low and high crop losses were recorded across...