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US researchers to tackle herbicide-resistant kochia

US researchers at the University of Wyoming are to investigate the effects of crop rotation and tillage on herbicide-resistant kochia (Kochia scoparia). The five-year study will involve planting fields with herbicide-resistant and susceptible strains of the weed. Kochia has developed resistance to several commonly used herbicides, including atrazine, dicamba and glyphosate. Crop rotation and tillage are often recommended for the control of herbicide-resistant weeds, but there is "not much field-based information on how successful these approaches will be", says department of plant sciences associate professor Andrew Kniss. He has received a National Institute of Food and Agriculture grant to analyse methods of weed control other than herbicides.

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