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2Department of Plant Pathology, G.B.P.U.A.T., Pantnagar-263 145, U.S. Nagar, Uttarakhand, India
The various impact of using chemical insecticides in agriculture has been experienced with several facts like contamination of environment; effects in human health and impact in relation to insect pests consist of effect on non target pests, development of insecticide resistance to insect pests, secondary pest’s outbreak and resurgence of pest populations. So, development of alternatives to chemical insecticides has been an important action in managing pests for promoting a sustainable agriculture. Microbial biopesticides acts as a solution as they are environmentally safe, self perpetuating in nature, specific to target pests etc. Among the microbial biopesticides, viruses after bacterial and fungal products occupy a special space in managing several pests. NPV forming polyhedra like occlusion bodies kills most important crop pests such as Helicoverpa armigera and Spodoptera litura. NPV can be implemented as one of major component in IPM programme. So, reduction of application of broad-spectrum pesticides increases the potentiality of implementing NPV in IPM programme and allow to the build-up of natural enemies in crop ecosystem.