Comparative efficacy of selected chemical insecticides and neem products against tomato fruit borer [Helicoverpa armigera (Hubner)] in Allahabad

The present investigation entitled, Comparative efficacy of selected chemical insecticides and neem products against tomato fruit borer [Helicoverpa armigera (Hubner)] in Allahabad, Were carried out during Rabi season of 2017-2018 at Central Research Farm, Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad. The seasonal incidence of fruit borer (Helicoverpa armigera) from 1st week of December (2.98% damage) that is 49th week of sowing which gradually increased. The infestation percent reached to its peak level (39.71%) at 3rd week of January. Among the data on present infestation of fruit borer after first spraying results were statistically significant. The lowest infestation of fruit borer were recorded in treatments T3-Spinosad 45% SC (3.17%), followed by T7-Fipronil SC (3.73%), T4-Cypermethrin 25EC (4.19%), T5-Quinalphos 25EC (5.29%), T6-Indoxacarb 14.5%SC (5.44%), T2-NSKE (10.05%), T1-Neem oil (11.23%). However all these treatments were superior over control. The maximum yield was reported in T3 Spinosad (17.43 q/ha), followed by Fipronil (16.6q/ha), Quinalphos (15.44q/ha), Cypermethrin (14.46q/ha), Indoxacarb (12.38q/ha), NSKE (13.53q/ha), Neem oil (13.32q/ha). The highest cost benefit ration was obtained from Spinosad (1:0.78).