Evaluation of new insecticide molecules against cotton jassid, Amrasca bigutulla bigutulla (Ishida) on okra under mid-hill conditions of Himachal Pradesh

Investigations were carried out during Kharif season of 2011–2013 at Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh to evaluate some new insecticide molecules against Amrasca bigutulla bigutulla (Ishida) on okra cv P-8. All the treatments resulted in lower jassid population as compared to control. The application of thiamethoxam (0.35 g/l) was found to be superior in suppression of jassids (1.51 jassids/plant) which was statistically at par with spiromesifen (0.8 ml/l, 1.62 jassids/plant) followed by dimethoate (2 ml/l, 1.66 jassids/plant) and thiacloprid (0.5 ml/l, 1.67 jassids/plant). Significantly highest seed yield (1.18 tonnes/ha) was also recorded with the treatment of thiamethoxam.