1Department of Entomology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar-263145, Uttarakhand, India
Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh, India
*Corresponding author's E-mail: premvijaybhu@gmail.com
Online published on 3 April, 2017.
Studies on the impact of various insecticides on natural enemies in cowpea crop revealed that all the insecticides caused harmful effect on the population of coccinellid beetles and spiders. Bio-rationals, Bacillus thuringiensis var. kurstaki and azadirachtin were found comparatively safe. The population of coccinellid beetles gradually decreased in all treatments whereas untreated check recorded significantly more number of beetles/plant/plot while the population of spiders gradually increased in all treatments.
Insecticides, cowpea crop, ecosystem, coccinellid, spider
