| Benchmark study on glyphosate-resistant cropping systems in the United States. Part 4: Weed management practices and effects on weed populations and soil seedbanks. | |
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MedLine Citation:
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PMID: 21520485 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: Weed management in glyphosate-resistant (GR) maize, cotton and soybean in the United States relies almost exclusively on glyphosate, which raises criticism for facilitating shifts in weed populations. In 2006, the benchmark study, a field-scale investigation, was initiated in three different GR cropping systems to characterize academic recommendations for weed management and to determine the level to which these recommendations would reduce weed population shifts. RESULTS: A majority of growers used glyphosate as the only herbicide for weed management, as opposed to 98% of the academic recommendations implementing at least two herbicide active ingredients and modes of action. The additional herbicides were applied with glyphosate and as soil residual treatments. The greater herbicide diversity with academic recommendations reduced weed population densities before and after post-emergence herbicide applications in 2006 and 2007, particularly in continuous GR crops. CONCLUSION: Diversifying herbicides reduces weed population densities and lowers the risk of weed population shifts and the associated potential for the evolution of glyphosate-resistant weeds in continuous GR crops. Altered weed management practices (e.g. herbicides or tillage) enabled by rotating crops, whether GR or non-GR, improves weed management and thus minimizes the effectiveness of only using chemical tactics to mitigate weed population shifts. Copyright © 2011 Society of Chemical Industry. |
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Authors:
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Robert G Wilson; Bryan G Young; Joseph L Matthews; Stephen C Weller; William G Johnson; David L Jordan; Micheal Dk Owen; Philip M Dixon; David R Shaw |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-4-26 |
Journal Detail:
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Title: Pest management science Volume: - ISSN: 1526-4998 ISO Abbreviation: - Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-4-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100898744 Medline TA: Pest Manag Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Society of Chemical Industry. |
Affiliation:
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University of Nebraska-Lincoln, Scotts Bluff, NE, USA. rwilson1@unl.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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