Bioefficacy of insecticides against tomato fruit borer, Helicoverpa armigera (Hubner)

Selected insecticides viz. Flubendiamide 39.35% SC, Indoxacarb 14.5% SC, Lambda cyhalothrin 5% EC, Novaluron 10% EC, Quinalphos 25% EC, Spirotetramat 120% SC+ Imidacloprid 120% SC Chlorantraniliprole 18.5% SC were evaluated for their effectiveness against tomato fruit borer by conducting field trial at PGI, MPKV, Rahuri during the year 2019. Three sprays of each insecticide were applied at the occurrence of the pest. The result revealed that lowest larval population (1.14 larvae/plant) of H. armigera was recorded in treatment of chlorantraniliprole 18.5% SC. Flubendiamide 39.35% SC (1.51 larvae/plant) was the next promising treatment followed by indoxacarb 14.5% SC exhibiting 1.70 larvae/plant. Treatments viz. spirotetramat 120% SC + imidacloprid 120% SC, lambda cyhalothrin 5% EC, quinalphos 25% EC found to be moderately effective against H. armigera and recorded larval population ranging from 1.99 to 2.27 larvae/plant H. armigera. Novaluron 10% EC was least effective, with maximum (2.42 larvae/plant) population of H. armigera.