Abstract

A field experiment was conducted during 2010-11 and 2011-12 to evaluate the efficacy of pinoxaden alone and in combination with other herbicides against complex weed flora in wheat. Pinoxaden 50 g/ha alone and as tank mix combination individually with carfentrazone 20 g/ha , metsulfuron 4 g/ha or 2,4-D 500g/ha at 28 DAS and pinoxaden 50 g/ha alone at 28 DAS followed by carfentrazone 20 g/ha or metsulfuron 4 g/ha or 2,4-D 500g/ha at 35 DAS, was compared to idosulfuron + mesosulfuron (2.4 + 12 g/ha), weed free and weedy check for weed control and grain yield. Medicago denticulata, Chenopodium album and Alternanthera triandera were the major weeds constituting 86.46% during 2010-11 and 87.27% during 2011-12. It was concluded that other than hand weeding twice, combined application of pinoxaden + carfentrazone @ 50 + 20 g/ ha and pinoxaden + metsulfuron @ 50 + 4 g/ ha produced significantly higher grain yield of wheat than weedy check due to the lowest weed dry matter production, high weed control efficiency and higher yield attributes. Weed index was the highest under weedy check and reduced the grain yield of wheat by 36.9%.

Keywords: Carfentrazone, Metsulfuron, Pinoxaden, Weeds, Wheat