EFFICACY OF DIFFERENT INSECTICIDES AGAINST BOLLWORMS ON COTTON

Abstract

Ten insecticides were tested under field conditions against Earias insulana (Boisd.) (spotted), E. vitella (Fab.) (spinny) and Helicoverpa armigera (Hub.) (American) bollworms at recommended doses during 2001. All the insecticides were effective against these pests up to 7 days after treatment (DAT). For spotted bollworms, Nighaban 20EC (Fenpropathrin) followed by Talstar 10EC (Bifenthrin) was most effective up to 3 DAT, whereas Nighaban 20EC (Fenpropathrin) followed by Confidor Supra 500EC (Imidacloprid + Betacyfluthrin) was most effective up to 7 DAT. Patriot 360SC (Chlorfenapyr) was least effective. For American bollworm, Patriot 360SC (Chlorfenapyr) followed by Taophos 25EC (Quinalphos) was most effective up to 3 DAT, whereas Larvin 80DF (Thiodicarb), Tracer 240SC (Spinosad) and Lorsban 40EC (Chlorpyrifos) were most effective up to 7 DAT. Vital 1.8EC (Abamectin) was least effective. So, Nighaban 20EC and Lorsban 40EC were the most effective for spotted bollworm and American bollworm, respectively.