FIELD EFFICACY OF AN INSECT GROWTH REGULATOR, BUPROFEZIN 25 SC AGAINST PLANTHOPPERS INFESTING PADDY CROP

Abstract

Field efficacy of buprofezin 25 SC @ 625, 750 and 875 ml/ha against brown planthopper (BPH) and whitebacked planthopper (WBPH), infesting paddy crop revealed that after 3 days of spray, BPH and WBPH count in all buprofezin doses were significantly inferior as compared to standard checks, imidacloprid 17.8 SL and chlorpyriphos 20 EC. However, at 7 and 10 DAS, buprofezin @ 750 and 825 ml/ha were found to be at par with imidacloprid and were significantly effective than chlorpyriphos. The reduction in BPH population after 7 and 10 days of spray was 81.23 and 86.55 % in buprofezin @ 825 ml/ha as against 77.85 and 85.18 % in its lower dose (750 ml/ha), 80.45 and 75.29 % in imidacloprid and 73.28 and 67.29 % in chlorpyriphos, respectively. Buprofezin @ 750 and 825 ml/ha resulted in 79.02 and 82.96 % reduction in WBPH at 7 DAS and 86.51 and 88.18 % at 10 DAS, respectively. The yield increase over control was 15.27 and 16.50 % in buprofezin @ 750 and 825 ml/ha, respectively. It may be concluded buprofezin @ 750 and 825 ml/ha can be viable option to already recommended neonicotinoids and organophosphate insecticides against BPH and WBPH in rice crop.