Evaluation of pongamia oil soap against leaf hopper, Amrasca biguttula biguttula (Ishida) infesting okra

Abstract

Field studies on evaluation of pongamia and neem oil soap at various concentrations against okra leaf hopper, Amrasca biguttula biguttula (Ishida) was carried out during the year 2018- Treatments i.e. T1: Pongamia oil soap 0.6%; T2: Pongamia oil soap 1%; T3: Pongamia oil soap 2%; T4: Neem oil soap 0.6%; T5: Soap solution 0.5%; T6: Quinalphos 25 EC @ 0.05%; T7: Standard check applied once at vegetative stage and twice during reproductive stage. Quinalphos 25 EC @ 0.05 % was effective followed by pongamia oil soap 2 per cent, pongamia oil soap 1 per cent, neem oil soap 0.6 per cent and pongamia oil soap 0.6 per cent. The effectiveness of the soap reduced after seven days of treatment.