OAR@ICRISATEffect of different IPM components on Helicoverpa armigera (Hubner) and their impact on natural enemies in chickpeaVVisalakshmiauthorNeem proved as effective oviposition deterrent on chickpea foliage under cage studies. The antifeedant effect of neem was also proved under choice and no choice situations in laboratory. Neem produced several abnormalities in H.armigera like mortality during larval stage, increased larval and pupal duration, reduced pupal weight, reduced effective oviposition period and fecundity when treated at larval stages, but these effects were more pronounced on early stages of larvae than later stages. However it had no effect on egg hatchability. Robin blue 1% proved to be a go'od ultraviolet ray protectant and increased the persistence of HaNPV up to six days under field conditions. HaNPV was found to have more impact on early stages of larvae than later stages. In addition to high larval mortality it was found to produce several ill effects on H.armigera..........Groundnut2001Acharya N.G. Ranga Agricultural University;Department of EntomologyThesis

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