Using diclosulam in a weed control program for peanut in South Texas

Field studies were conducted during the 1997 and 1998 growing seasons to evaluate diclosulam alone and in combination with ethalfluralin for Eclipta prostrata, Ipomoea lacunosa, Panicum texanum, and Cyperus esculentus control. Diclosulam alone or in combination with ethalfluralin-applied preplant incorporated (PPI), preemergence (PRE), or postemergence (POST) at 0.009 to 0.024 kg ai/ha provided at least 93% season-long Eclipta control. Ethalfluralin, in combination with diclosulam-applied PPI at 0.016 or 0.024 ka ai/ha controlled C esculentus at least 82% season-long. Ethalfluralin followed by diclosulam-applied POST at 0.016 or 0.024 kg/ha controlled at least 90% Ipotnoea season long, while ethalfluralin followed by diclosulam-applied PPI or PRE at 0.024 kg/ ha controlled 81 %. Ethalfluralin in combination with diclosulam at 0.016 kg/ha or ethalfluralin followed by diclosulam at 0.016 or 0.024 kg/ha applied POST controlled greater than 80% P. texanum throughout the growing season. Diclosulam offers more effective Eclipta control than the commerical standards now being used. (C) 2004 Published by Elsevier Ltd.