Comparative efficacy of insecticides, NSKE and Karanj oil against shoot and fruit borer, Earias vittella (Fabricius.) on okra

Abstract

A field trail was conducted at Cental Research Farm, SHUATS, Naini, Prayagraj, U.P. during kharif season of 2021. The field was laid in Randomised Block Design with seven treatments replicated thrice viz., Neem oil 3%, Indoxacarb 14.5% SC, Lambda cyhalothrin 5% EC, NSKE 5%, Emamectin benzoate 5SG, Karanj oil 2%, Flubendiamide 480 SC along with control plot. The results after first and second spray revealed that among the different treatments, Emamectin benzoate 5SG (10.82% & 11.64 %) recorded lowest percent infestation of Earias vittella followed by Flubendiamide 480 SC (15.92% and 17.25 %), Indoxacarb 14.5SC (17.06% and 18.45 %), Lambda cyhalothrin 5% EC (18.13% and 18.52%), Neem oil 3% (20.44% and 20.69%), NSKE 5% (21.44% and 21.12%) and Karanj oil 2% (24.16% & 23.61%) was the least effective among all treatments with percent shoot and fruit infestation respectively. Among the treatments studied, the best and most economical treatment was Emamectin benzoate 5SG (1:5.60), Flubendiamide 480 SC (1:5.44), Indoxacarb 14.5SC (1:5.33), Lambda cyhalothrin 5% EC (1:5.08) followed by Neem oil 3% (1:4.89), NSKE 5% (1:4.81) and the least cost benefit ratio was observed in Karanj oil 2% (1:4.66) when compared to control plot (1:2.82).