Efficacy of different biopesticides and botanicals against the hadda beetle, Henosepilachna vigintioctopunctata (Fab.) on Brinjal

Abstract

A field trail was conducted at the Central Research Farm, Sam Higginbottom University of Agriculture, Technology and Sciences, Naini, Prayagraj during Kharif season 2023. The trail was laid out in Randomized Block Desion with three replications, eight treatments were evaluated against Earias vittella viz, T1 Spinosad 240 EC @ 1.5ml/lit, T2 Indoxacarb 14.5 SC @0.1ml/lit, T3 emamectin benzoate 1.9 EC @2.0ml/lit, T4 Garlic extract @50ml/lit, T5 Neem seed kernel extract 5% @5 ml/lit, T6 Karanja plant extract @50ml/lit, T7 Tobacco leaf extract @ 100ml/lit T8 - untreated control were evaluated against Hadda Beetle. The result showed that the treatments lowest larval population was recorded in T6 Karanja plant extract (2.15, 1.55), and the treatments T7 neem seed kernel extract 5% (3.063, 2.53) was least effective among all the treatments against Hadda Beetle. The plot treated with Karanja plant extract (T6) showed highest yield (211.69 q/ha) and found to be most effective treatment and lowest effective Neem seed kernel extract 5% (T5) 106.35 q/ha as compared to untreated control plot (74.06 q/ha).