Abstract
During the past few years, the damage by the American bollworm Helicoverpa armigera (Hbn) has become serious on many crop plants especially cotton in South India. Along with that insecticide resistance varieties of larvae were also reported. In our study, field-collected larvae were reared in glass vial providing tender leaves for neonatal larvae and squares of grown up larvae. The along with the adjuvants were made into wettable and dust formulation and were studied. Evaluation of the Efficacy of Helicoverpa NPV with certain adjuvants possessing phagostimulants in combination were tested in different instars and results were tabulated.
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