Evaluation of insecticides and biorationals for the management of Leafhopper, Amrasca biguttula biguttula (Ishida) (Hemiptera: Cicadellidae) in Okra

Abstract

Field trials were conducted at Anbil Dharmalingam Agricultural College and Research Institute, Tiruchirappalli District, Tamil Nadu, India to evaluate insecticides and biorationals for the management of leafhopper, Amrasca biguttula biguttula (Ishida) in okra during Kharif, 2019 and Rabi, 2019. The results revealed that the highest reduction of leafhopper population in Kharif, 2019 and Rabi, 2019 was recorded in dinotefuran 20 SG @ 0.30g/l (91.34 and 90.57%) followed by buprofezin 25 SC @ 2ml/l (88.36 and 87.02%). Among the biorationals, ginger + garlic + green chilli extract 5 per cent was effective with 77.91 and 76.31 per cent reduction over untreated control, respectively in Kharif, 2019 and Rabi, 2019 followed by NSKE 5 per cent and Lecanicillium lecani @ 10ml/l. Based on the moderate to high efficacy levels and low toxicity to environment and human beings, Dinotefuran 20 SG @ 0.30g/l, Buprofezin 25 SC @ 2ml/l and Ginger + Garlic + Green Chilli extract 5 per cent would be used as a potent component in IPM module for okra leafhopper, A. biguttula biguttula with limited use of insecticides.