Vol. 12, Issue 9 (2023)

Author(s):
Dr. NK Bhute, Dr. RS Wagh, Dr. AK Kolage and NK Medhe

Abstract:
The present study was conducted at All India Coordinated Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri, Maharashtra, during Kharif 2018-19 under field condition. The results revealed that all the treatments of chemical insecticides were significantly superior over untreated control. The treatment with Chlorantraniliprole 18.5 SC @ 55 g a.i./ha was observed to be most effective against pink bollworm in which minimum pink bollworm larvae 3.67 /20 green bolls was observed. Similarly lowest percent green boll damage (11.33), open boll damage (21.33), locule damage (12.33) and highest seed cotton yield (20.05q/ha) was recoreded in the treatment Chlorantraniliprole 18.5 SC @ 55 g a.i./ha. This treatment was statistically on par with the treatments of l-cyhalothrin 5EC @ 500 g.a.i./ha, thiodicarb 75 WP @ 750 g.a.i. and Profenophos 50 EC @ 750 g.a.i./ha. The data pertaining to effect of various insecticides on natural enemies viz. lady bird beetle, chrysopa and spiders in Bt cotton indicated highest number of natural enemies per plant were recorded in untreated control. The treatment with Chlorantraniliprole 18.5 SC @ 55 g a.i./ha was observed to be safer to the natural enemies in which higher number of natural enemies were observed. The results concluded that application of Chlorantraniliprole, has potential to obtain higher yield and net profit over remaining insecticides and also safer to natural enemies as its having green label.