ABSTRACT
There are many potential benefits in weed management to be obtained from use of herbicide-resistant crops (HRCs). A major benefit will be the opportunity for new strategies and/or increased flexibility in the management of problem weeds. In the US canola is grown primarily in the Pacific Northwest, the northern Corn Belt and central Plains, and in the southeast. Major weed problems in canola include kochia, wild mustard, and wild radish. Contamination of canola by seeds of wild radish and wild mustard create problems when canola is processed into cooking oils and margarine. Sethoxydim-tolerant corn cultivars could enhance the use of alternative weed control strategies in corn production. Sethoxydim is effective for postemergence control of most annual and perennial grasses. Two herbicide resistant (HR) cotton cultivars are currently being developed with resistance to bromoxynil and glyphosate. The major deficiency in sorghum weed management is lack of postemergence control options for annual and perennial grasses.
