Monday, November 13, 2006
24-2
Weed Control Systems for Winter Canola in the Southern Great Plains.
Deena Morley1, Mark C. Boyles1, and Thomas Peeper2. (1) Oklahoma State Univ, 11414 E 68th Street, Ripley, OK 74062, (2) 368 Ag Hall, Oklahoma State University, Oklahoma State University, Plant and Soil Sciences, Stillwater, OK 74078-6028
In the Southern Great Plains, winter canola is being introduced as a rotational crop with hard red winter wheat to improve options available for winter annual weed control. Four studies are being conducted in north central Oklahoma to evaluate weed control and crop response to various systems in winter canola. System components under investigation include conventional and Roundup Ready varieties and EPA registered herbicides. Major target species include Italian ryegrass, feral rye, and jointed goatgrass, which are difficult to manage in continuous winter wheat. Italian ryegrass was controlled at least 90 percent when Treflan was applied pre-plant incorporated and with sequential applications of Roundup Original Max. Feral rye was controlled a minimum of 95 percent with all applications except when Treflan alone and Select were applied. Jointed goatgrass was controlled at least 98 percent with Roundup Original Max.