Abstract
Glyphosate is the first herbicide choice for growers in the Pacific Northwest to control Russian thistle after harvest and during summer fallow. However, overreliance on this chemical has already led to the occurrence of herbicide‐resistant weeds. In fall 2015, complaints from farmers about lack of Russian thistle control with glyphosate prompted an Oregon State University weed scientist to test whether there were glyphosate‐resistant populations in northeastern Oregon. Earn 0.5 CEUs in Integrated Pest Management by reading this article and taking the quiz at www.certifiedcropadviser.org/certifications/self‐study/830.
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