EVALUATION OF FIELD EFFICACY OF IMIDACLOPRID 40% + ETHIPROLE 40% - 80 WG AGAINST PLANTHOPPERS IN RICE

摘要

Imidacloprid 40%+ethiprole 40% -80 WG was field evaluated for its bio-efficacy against brown planthopper (BPH) and white backed planthopper (WBPH) in rice during kharif2007 with three dosages viz., 50, 75 and 100 g a.i./ha. The results revealed that all the dosages of Imidacloprid 40%+ethiprole 40% -80 WG recorded more than 98 per cent reduction in the population of both BPH and WBPH over the untreated control and superior to neonoctinoid insectides like imidacloprid @ 25 and 50 g a.i./ha, thiamethoxam 25 g a.i./ha and ethiprole 10 SC @ 50 g a.i./ha. The highest grain yield of 5300 kg/ha was recorded in imidacloprid @ 50 g a.i./ha treated plots and followed by imidacloprid 40% + ethiprole 40% -80 WG @ 75 g a.i./ha (4678 kg/ha).