M. Sivarama Krishna, L. Vijaya Bhaskar, N.C. Venkateswarlu, K. Viswanath and B. Ramana Murthy
Abstract
Pink bollworm has emerged as a major threat for successful cotton cultivation in Andhra Pradesh, extensive random roving survey was conducted in three major cotton growing districts of Kurnool, Guntur and Krishna during 2021 and 2022 seasons to assess the dynamics of pink bollworm infestation. During the year 2021 rosette flower incidence, green boll, open boll and locule damage ranged from 1.8-6.8, 16.6-31.6, 14.9-53.1 and 13.4- 28.4 respectively. During 2022 rosette flower incidence, green boll, open boll and locule damage ranged from 1.8-8.0, 19.3-31.5, 34.5-59.4 and 14.3-32.8 respectively. Gradual progression of pink bollworm infestation was noticed with the advancement of crop season.