Herbicide & fungicide resistance
Stacking the odds against awnless barnyard grass this summer
Oct. 9, 2020
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4 min read
Sometimes herbicide resistance comes with a fitness penalty that growers can use as an Achilles’ Heel to drive down weed seed production. Unfortunately, glyphosate resistance seems to confer no such disadvantage on awnless barnyard grass. In a recent random survey of summer-growing weeds in the northern grains region, 36 per cent of awnless barnyard grass (Echinochloa colona) populations proved resistant to glyphosate.
