Annals of Plant Protection Sciences

Field trials were conducted in two crop seasons (kharif) during 2002 and 2003 with American cotton, cv. Pusa 8–6 to study the comparative bio-efficacy of two neonicotinyl insecticides, acetamiprid and imidacloprid, against the jassid, Amrasca devastans, using foliar applications. Acetamiprid 40 g ai/ha and imidacloprid 50 g ai/ha were the most effective treatments against A. devastans (48 & 47%) increase in seed cotton yield over control, respectively, but lower doses were less effective. The conventional insecticide, triazophos (500 g ai/ha) was also found less effective against A. devastans (39% increase in seed cotton yield over control). Imidacloprid and acetamiprid provided similar levels of protection to cotton crop against jassid. The results suggested that these two insecticides were good substitutes for conventional insecticides in vogue, which could be used in formulating a successful in management strategy for jassid in cotton.