Bioefficacy of insecticides as seed dresser against whitegrub, holotrichia consanguinea blanch in groundnut

Field experiments were conducted at Agricultural Research Station, Durgapura, Jaipur, India during kharif season of 2009 and 2010. Four insecticides were evaluated along with standard checks, imidacloprid 17.8 SL, chlorpyriphos 25 EC and quinalphos 25 EC against Holotrichia consanguinea. All the insecticides were used as seed dresser on groundnut kernel. Pooled analysis of data pertaining to damage and dry pod yield revealed that clothianidin 50 WDG at 2.0 g/kg seed belonging to neonicotinoid group, provided maximum protection (82.64%) with minimum plant damage (5.47%) followed by its higher dose 3.0 g/kg seed (82.39% and 5.55%, respectively) and imidacloprid 17.8 SL at 3 ml (80.36% and 6.19%, respectively). Maximum yield of 23.30 kg/ha in 3.0 g/kg seed dose of clothianidin 50 WDG was recorded followed by in its lower dose 2.0 g/kg seed (22.24 q/ha) and imidacloprid 17.8 SL (20.93 q/ha). Clothianidin 50 WDG@ 2g/kg seed may also be recommended for management of H. consanguinea on groundnut cultivated in sandy loam soil of Rajasthan.