BIO-EFFICACY OF CERTAIN NEWER INSECTICIDES AGAINST COTTON BOLLWORM UNDER HIGH DENSITY PLANTING SYSTEM

摘要

Field experiments were conducted at the experimental field of Dept. of Entomology, College of Agriculture, Badnapur during Kharif season of 2015 - 16 to evaluate the efficacy of newer insecticides against cotton bollworms under high density planting system. The treatment of chlorantraniliprole 18.5 SC @ 150 ml/ha proved 4 DAS. The rest of all the treatments were also significantly superior over control except profenophos 50 EC @ 1500 ml/ha after both 1st and 2nd spray. The data recorded in relation to green boll damage after 1stand 2nd spray at 1, 3, 7, 10 and 14 DAS the treatment of chlorantraniliprole 18.5 SC @ 150 ml/ha proved significantly superior with 1.33, 1.55, 1.53, 1.18 and 1.67 per cent damage while profenophos 50 EC @ 1500 ml/ha proved least effective treatment with 2.48, 2.94, 2.92, 2.71 and 3.27 per cent damage respectively. The treatment of emamectin benzoate 5 SG @ 220 gm/ha recorded highest yield i.e. 777 kg/ha but itwas statistically at par with rest of the six treatments.