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EFFECT OF NEEM OIL AND NEEM LEAF EXTRACT ON MORTALITY, GROWTH AND FEEDING RESPONSES OF JUTE HAIRY CATERPILLAR, Spilarctia obliqua (Walker)

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dc.contributor.author ISLAM, MOHAMMAD DIDARUL
dc.date.accessioned 2018-11-20T14:23:46Z
dc.date.available 2018-11-20T14:23:46Z
dc.date.issued 2006-06
dc.identifier.uri http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/1178
dc.description A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulJIllinent of the requirements for the degree of MASTER OF SCIENCE IN ENTOMOLOGY SEMESTER: JULY-DECEMBER, 2006 en_US
dc.description.abstract Experiments were conducted in the I)ivision of Entomology. Bangladesh Jute Research Institute, Manik Mia Avenue. Dhaka. to study the clTbct of Neem oil and Neem leaf extract on mortality, growth and feeding responses ofjute haiiy caterpillar. Spilarctia obliqua (Walker). To evaluate the efficacy or neem products on the larval mortal fly. third. Iourth and ti (lii instar larvae were allowed to feed on jute leaves treated with neem extract (1:20) and nccm oil at 0.5. 1.0. 2.5 and 5.0% emulsified with 0.1% Nikalin and their modality were recorded at different days after treatment. Maximum percent larval mortality occurred at the higher two concentratiOns (2.5 and 5.0%) in each instar. Neem lealextract (1:20) and lower concentratIons (0.5 and 1.0%) of neeni oil. signiticantly increased the larval mortality. flue median lethal dose (11)50) values of neem oil for different larval instars at above concentration were also determined. The effect of neem oil on growth and feeding respohises were evaluated by exposing fourth instar larvae to lOad treated with riccni oil at 0.5% concentration either for 48 hours (48 hrs treatment) or continuously throughout the larval period (continuous trcatment).Neeni oil exhibited growth inhibiting etiCets on the developing larvae and reduced the food consumption as compared to control. Ilie effects were more pronounced in continuous treatment. Such efiCets on development were prolongation of larval period. reduction in the larval size, blackish spots on the larval body. hairless larvae and development of abnonnal pupae. Adults developed from treated larvae were malformed or had crippled wings. Neem served as a potential growth inhibitor and feeding deterrent against S. ohl:qua and it can be integrated with appropriate cultural and biological pest control tactics. en_US
dc.language.iso en en_US
dc.publisher Department of Entomology, Sher-e-Bangla Agricultural University, Dhaka-1207 en_US
dc.subject NEEM OIL en_US
dc.subject NEEM LEAF en_US
dc.subject JUTE HAIRY CATERPILLAR en_US
dc.title EFFECT OF NEEM OIL AND NEEM LEAF EXTRACT ON MORTALITY, GROWTH AND FEEDING RESPONSES OF JUTE HAIRY CATERPILLAR, Spilarctia obliqua (Walker) en_US
dc.type Thesis en_US


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