Visalakshmi, V
(2001)
Effect of different IPM components on
Helicoverpa armigera (Hubner) and their impact on natural enemies in chickpea.
PHD thesis, Acharya N.G. Ranga Agricultural University.
Supervisors
| Supervisors Name | Supervisors ID |
|---|
| Arjuna Rao, P | UNSPECIFIED |
| Ranga Rao, G V | UNSPECIFIED |
Abstract
Neem 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..........
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