RESISTANCE STATUS AND GENETIC DIVERSITY OF Spodoptera litura (Fab.) AND INFLUENCE OF INTERCROPPING SYSTEMS ON INSECT PESTS IN SOYBEAN

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dc.contributor.advisorPATIL, R. H.
dc.contributor.authorKIRAN GANDHI, B.
dc.date.accessioned2019-01-31T04:07:23Z
dc.date.available2019-01-31T04:07:23Z
dc.date.issued2015-05
dc.description.abstractInvestigation on genetic diversity, insecticide usage pattern, biochemical basis of resistance, field resistance of Spodoptera litura and effect of intercropping system on incidence of major insect pests in soybean was carried out at Institute of Agriculture Biotechnology (IABT) and Main Agricultural Research Station (MARS), UAS, Dharwad during 2013-14 and 2014-15. Random Amplified Polymorphic DNA (RAPD) analysis for genetic diversity of S. litura larval population revealed, populations from Hyderabad and Indore, shared 100 per cent similarity, Pune and Parbhani showed 90 per cent similarity, Adilabad and Hyderabad and Adilabad and Indore showed 83 per cent similarity, Dharwad and Belagavi showed 72 per cent similarity. The lowest genetic similarity value was observed between Dharwad and Parbhani populations (46%). Fourteen different insecticides were used by the farmers from various regions for management of lepidopteran insect pests in soybean. Insecticides number used by the farmers differed with region, in Parbhani-9, Adilabad and Hyderabad-8, Dharwad and Belagavi-7 and Indore-5. Prolonged and continuous usage of organophosphates, carbamates and pyrathriods insecticides in soybean ecosystem resulted in increased activity of Car a- and b- esterase and acetyl cholinesterase activity and elevated LC50 values, specified development of field resistance in S. litura. Intercropping system, soybean + pigeonpea (4:2) reduced the populations of soybean defoliators (leaf folder, tobacco caterpillar, green semilooper), whereas soybean + cotton (2:1) was more favorable for increase in natural enemies i.e., chrysopids, cadavars infestation by N. rileyi and high incidence of predatory bugs.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810093017
dc.keywordsRESISTANCE , GENETIC DIVERSITY, SPODOPTERA LITURA, INFLUENCE, INTERCROPPING SYSTEMS, INSECT PESTS, SOYBEANen_US
dc.language.isoenen_US
dc.pages232en_US
dc.publisherUniversity of Agricultural Sciences, Dharwaden_US
dc.subAgricultural Entomologyen_US
dc.subjectnullen_US
dc.themeRESISTANCE STATUS AND GENETIC DIVERSITY OF Spodoptera litura (Fab.) AND INFLUENCE OF INTERCROPPING SYSTEMS ON INSECT PESTS IN SOYBEANen_US
dc.these.typePh.Den_US
dc.titleRESISTANCE STATUS AND GENETIC DIVERSITY OF Spodoptera litura (Fab.) AND INFLUENCE OF INTERCROPPING SYSTEMS ON INSECT PESTS IN SOYBEANen_US
dc.typeThesisen_US
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