author(s)
Pawan K Ojha, Renuka Kumari and Ram S Chaudhary

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 1^st, 3^rd, 5^th, 7^th, and 14^th days of pesticide application. Thereafter, it was concluded that after 3^rd to 14^th days, all treatments were found superior over the untreated control (0.0%). Under independent and interactive studies, data received after 14^th 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%.