Vol. 11, Issue 12 (2022)

Author(s):
Pawar AA, Bhede BV and Tupe AP

Abstract:
An experiment entitled “Effect of water pH on bio-efficacy of different insecticides against major insect pests of Bt cotton.” was conducted during kharif 2021-22 Agricultural Research Farm, Department of Entomology, College of Agriculture, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani (M.S.) to study the effect of water pH on bio efficacy of insecticides against pests of cotton. The experiment was laid out in split plot design with three replications and twelve treatments. The treatment details of experiment, spraying insecticides with Acidic, Alkaline, and neutral water. The population of leaf hopper observed lowest in treatment with acidic water (5 pH) and highest population was recorded under alkaline water (9 pH). Among insecticides, most superior insecticide treatment was Fipronil 5% SC followed by Profenophos 50% EC and Lambda-cyhalthrin 5% EC against leaf hopper. In interaction effect, insecticides in acidic and neutral water were more effective for management of leafhopper on Bt cotton than insecticides in alkaline water.