Bio-efficacy of pesticides on major pests of Jasminum sambac cv. Mysuru Mallige

Abstract

Jasminum sambac cv. Mysuru Mallige, a Geographical Indication (GI) crop of the Mysuru region in Karnataka, faces significant challenges from three primary pests: bud borer Hendecasis duplifascialis, leaf web worm Nausinoe geometralis, and red spider mite Tetranychus urticae. Separate evaluations were conducted to assess the efficacy of pesticides against these pests. In the case of bud borer infestation, Chlorantraniliprole 18.5% SC at a concentration of 0.2 ml/l demonstrated superior effectiveness, with a recorded mean percent of affected buds as low as 0.83. Following closely were Spinosad 45% SC at 0.3 ml/l (3.68) and Flubendiamide 39.35% SC at 0.25 ml/l (3.88). For leaf web worm management, Chlorantraniliprole 18.5% SC at 0.2 ml/l exhibited the most promising results, with a mean percent of damaged leaves as minimal as 0.53. This was followed by Flubendiamide 39.35% SC at 0.25 ml/l (3.44) and Spinosad 45% SC at 0.3 ml/l (3.82). In the evaluation of acaricides against red spider mite infestation, etoxazole 10% SC at 1 ml/l emerged as the most effective, recording the lowest mite population. Following this was Spiromesifen 22.9% SC at 0.8 ml/l.