RESPONSE OF Emex australis TO DIFFERENT POST-EMERGENCE HERBICIDES IN WHEAT (Triticum aestivum)

A field experiment was conducted to study the effectiveness of different post-emergence herbicides against spiny emex, Emex australis at the University of AgricultureFaisalabad, Pakistan. Fluroxypur + MCPA at 750 mL ha^-1,carfentrazone-ethyl at 50 g ha^-1, amidosulfuron at 60 g ha^-1,bromoxynil + MCPA at 1250 mL ha^-1, triasulfuron at 40 g ha^-1,thiofensulfuron-methyl at 100 g ha-1, tribenuron-methyl at 100 g ha^-1 and control (no spray) were tested. Carfentrazone-ethyl,fluroxypur + MCPA and bromoxynil + MCPA provided bettercontrol (86%, 85% and 76%, respectively) of E. australis overweedy check. Carfentrazone gave the maximum reduction in weed biomass (77%). While bromoxynil + MCPA gave maximum number of fertile tillers (427 m-2), number of grains spike-1 (47),1000 grain weight (33 g) and grain yield (3.39 t ha-1). Thus, for the management of spiny emex, E. australis, the post emergence application of bromoxynil + MCPA and carfentrazone ethyl at1250 ml and 50 g ha^-1, respectively is recommended.