author(s)
Divya B, Shivaray Navi, Sugeetha G, Vijaykumar L, Shashi Kumar C, Somu G and Patel VN

abstract
A field experiment was conducted at AICRP on cotton, Haradanahalli, Chamarajanagara during kharif 2018 to assess the efficacy of different insecticides against pink bollworm. Observation were made on number of pink bollworm larvae/20bolls, locule damage (%), good open bolls per plant, bad open bolls per plant and yield (Kg/ha).Finally the per cent reduction of larvae was calculated. The results of the experiment revealed that, the application of chlorantraniliprole 18.5 SC @ 0.21ml/l was found superior over the other treatments with minimum larval population (6.67 larvae/ 20 bolls), maximum good open bolls (35.55 GOB/plant) and highest yield ( 2002.96 kg/ha). Higher per cent reduction (71.00 per cent) of larvae was recorded in same treatment followed by emamectin benzoate 5 SG @ 0.31g/l and flubendiamide 39.5 SC @ 0.17 ml/l with 63.78 and 62.30 per cent reduction of larvae, respectively. The next best treatments which proven better were thiodicarb 75 WP @ 1.40 g/l and profenophos 50 EC @ 2ml/ l with per cent reduction of 59.43 and 56.52 larvae, respectively.