Effectiveness and economic evaluation of new generation insecto-acaricides against thrips and mites in green chilli

Abstract

Field experiments were conducted at ICAR-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh, India during 2018-20 to evaluate the insecto-acaricidal activity of different newer molecules against yellow mite (Polyphagotarsonemus latus Banks) and thrips (Scirtothrips dorsalis Hood) infesting chilli revealed that maximum reduction in mite population was obtained in treatment with Chlorfenapyr 10% EC @ 1.5 mL L-1 (65.32%) followed by Fenpyroximate 5% EC @ 1 mL L-1 (62.13%) and Fenazaquin 10% EC@ 2.5 mL L-1 (58.94%). In case of thrips, maximum reduction was achieved with Fipronil 5% SC (78.63%) followed by Emamectin Benzoate 5% SG @@ 0.4 g L-1(75.21%). Significantly higher green chilli yield (128.93 q ha-1) was obtained from Chlorfenapyr treated plots followed by Spiromesifen (121.81 q ha-1), and Fenpyroximate (113.22 q ha-1) indicating superiority of these newer molecules over the conventional one. However, the maximum cost benefit ratio was recorded in Fenpyroximate 5% EC (1:14.01) followed by Chlorfenapyr 10% SC (1:8.64). Chlorfenapyr 10% SC was found to be the most effective and yielded the highest among all the treatments but showed comparatively lower C:B ratio due to its relatively high cost.