A kochia survey in southern Alberta in 2017 found that all kochia populations were resistant to Group 2 ALS inhibitors, 50% of populations were resistant to Group 9 glyphosate, and 18% of populations resistant to Group 4 (dicamba) herbicides. Kochia populations with triple resistance to...

Of 45 Russian thistle populations tested from central and southern Alberta in 2017, 31 (62%) were Group 2 (ALS inhibitor) resistant. No populations exhibited resistance to Group 9 (glyphosate). A random survey of Russian thistle was conducted post-harvest in fall, 2017. A total of 45 populations...