Nandihalli, B SDevaraja, K2019-08-222019-08-222000No. of references 153http://krishikosh.egranth.ac.in/handle/1/5810123059"Investigations on Utilization of Biopesticides in the management of Pod Borer, Helicoverpa armigera Hubner on Chickpea were carried out at Main Research Station, Dharwad during 1999-2000. Among, Neem Seed Kernel (NSK) and Neem Leaf (NL) dusts at different dosages on different developmental stages of H. armigera in laboratory and field, NSK 60% talc based dust exhibited highest ovicidai action by recording least egg hatchability (29.20%) and neem leaf 60% talc and chalk based showed least egg hatchability of 35.55 and 36.60%, respectively. NSK and NL 60% talc based dusts caused cent per cent mortality of first and second instar larvae. NSK 60% talc based dust caused 95.44% mortality of third instar larvae and it caused 95.44 per cent mortality of fourth instar larvae. The NL 60% talc based dusts caused 85.44 % mortality of third instar larvae whereas on fourth instar only 70.44% mortality was observed. NSK 60% and NL 60% talc based dusts caused 63.33% and 60.00% mortality of pupae, respectively, which were followed by NSK 50 and 60% chalk based dusts. In field, NSK 60% dust was as effective as that of malathion 5% dust which were significantly superior over other treatments and recorded 77.74 and 74.96% larval reduction, respectively 15 days after dusting. The least leaf let damage of 9.23% and 1 0 . 1% and pod damage of 12.38% and 12.58%; higher grain yield of 13.40 q per ha and 12.83 q per ha and more B:C ratio 27.12 and 28.32 were recorded in these two treatments, respectively. Nomuraea rileyi (Farlow) Samson @ 1.5 g/l was effective in reducing the larval reduction of 67.36% and recorded the least leaf let (7.89%), pod damage (1 2.94%) and gave highest grain yield (11.5 q/ha). The spray sequence of three sprays of monocrotophos at vegetative, flowering and pod formation was most effective by recording 87.27% larval reduction followed by monocrotophos - NPV - neem which recorded 79.22% larval reduction. The plot treated with three sprays of monocrotophos recorded lowest leaf let (7.27%) and pod damage (10.34%) with higher grain yield (14.33 q/ha) which was followed by NPV _ neem - monocrotophos. The highest B : C ratio of 20.38 was observed in NPV - neem - monocrotophos"ennullThesis