The study on evaluation of biopesticides against Helicoverpa armigera Hubner at the college farm of Navsari Agricultural University in Navsari, Gujarat, India during the Rabi season of 2021-22 revealed that Bacillus thuringiensis (applied at a rate of 40 ml 10 l–1) was most effective in managing H. armigera and also in providing the maximum economic return. The next effective treatments were Metarhizium anisopliae (1 × 108 cfu g–1) (applied at a rate of 40 g 10 l–1), Beauveria bassiana (1 × 108 cfu g–1) (applied at a rate of 40 g 10 l–1) and HaNPV (250 LE ha–1) (applied at a rate of 50 ml 10 l–1), respectively. These biopesticides could be considered for incorporation into an integrated pest management (IPM) program for H. armigera. On the other hand, the treatment involving fresh cow urine at 0.4 per cent was the least effective and failed to control H. armigera population in gram.
Purabiya et al. (Tue,) studied this question.