Impact of certain bio-pesticides on larval mortality of Helicoverpa armigera Hübner (Noctuidae: Lepidoptera) in chickpea

Abstract

Impact of certain bio-pesticides and insecticide on larval mortality of Helicoverpa armigera were evaluated under chickpea field conditions during 2010-11 and 2011-12. In all experiments, observations were undertaken on larval mortality of the pest after 1st, 3rd, 5th, 7th, and 14th days of pesticide application. Thereafter, it was concluded that after 3rd to 14th days, all treatments were found superior over the untreated control (0.0%). Under independent and interactive studies, data received after 14th days of treatments revealed that Btk (1.25 kg), HaNPV (350 LE), HaNPV (125 LE) + Btk (0.5 kg), Btk (0.5 kg) + Quinalphos (0.02%) were observed with the highest mean larval mortality as 93.33%. Btk (1.25 kg) proved its highest efficacy with similar potency (93.33%) in both the years. Whereas, Azadirachtin (0.05%) was registered with the lowest mean larval mortality as 33.33%.