Performance of carfentrazone-ethyl 20%+sulfosulfuron 25% WDG - a formulated herbicide for total weed control in wheat.

Carfentrazone-ethyl 20%+sulfosulfuron 25% WDG (Premix) was evaluated against mixed weed flora in wheat during rabi seasons of 2008-09 and 2009-10 at the Research Farm of Department of Agronomy, Punjab Agricultural University, Ludhiana. The experimental field was heavily infested with Phalaris minor and broadleaf weeds. Among the herbicidal treatments, post-emergence application (30-35 DAS) of premix herbicide i. e. carfentrazone + sulfosulfuron at 36, 45 and 54 g/ha either with 625 ml or 750 ml/ha of surfactants performed at par with the recommended herbicides i. e. Leader 75 WG (sulfosulfuron) at 25 g/ ha and Total 75 WG (sulfosulfuron + metsulfuron) with respect to reduction in dry matter accumulation by P. minor as well as broadleaf weeds and production of grain yield of wheat. The bioefficacy of carfentrazone+sulfosulfuron at 45 g/ha without surfactant was found to be less as compared to its application with surfactants. Higher dose of this formulated herbicide i. e. 54 g/ha was more effective than its lower levels. Also alone application of carfentrazone 20 g/ha as well as unweeded (control) treatment produced significantly higher dry matter of P. minor and less grain yield as compared to all the herbicidal treatments.