Author
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Webster, Theodore |
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Submitted to: Florida Weed Science Society Proceedings
Publication Type: Abstract Only Publication Acceptance Date: 2/10/2013 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: In spite of the recent focus on herbicide resistant weeds, herbicide resistant weeds are not new to agriculture; the first herbicide resistant weed was documented in 1957, with the first widespread resistance occurring in common groundsel with atrazine in the early 1970’s. Glyphosate resistant weeds have rapidly developed in the U.S. to include 14 different weed species. The predominance of herbicide resistant weeds in our agroecosystems is a response to the dramatic change in selection pressure, especially the widespread use of glyphosate. The Weed Science Society of America assembled a panel of experts to review and evaluate herbicide resistance and develop best management practices to both hinder the development of herbicide resistance weeds and manage herbicide resistance when they occur. The best management practices include: 1) understand the biology of the weeds present, 2) reduce the soil seedbank, 3) plant into weed-free fields and keep them as weed-free as possible, 4) plant weed-free crop seed, 5) scout fields routinely, 6) use multiple herbicide mechanisms of action, 7) apply labeled herbicide rates, 8) utilize cultural practices to enhance crop competitiveness, 9) use mechanical and physical weed control practices to suppress weeds, 10) prevent movement of weed propagules, and 11) manage weed seed at harvest and post-harvest before they are incorporated into the soil seedbank. While all of these best management practices will not be applicable in every agroecosystems, implementation of some of these practices in each system should help delay the development of herbicide resistant weeds. |
