Glyphosate-resistant Russian thistle found in Chouteau County
In the fall 2015, seeds of a Russian thistle population surviving glyphosate applications were collected from a chem-fallow field in Chouteau County, Montana. The field was under wheat-fallow rotation and had a history of repeated glyphosate applications. Almost 100 plants screened from the population survived the field-use rate of glyphosate (@32 fl oz/a of 4.5 lb ae/gal Roundup Powermax). Dose-response experiments conducted by Prashant Jha and Vipan Kumar, weed researchers at the MSU Southern Agricultural Research Center in Huntle...