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.