A giant ragweed plant unaffected by 12 times the normal field rate of glyphosate.
A small seedling fleabane plant shown in late August, 2011 that germinated after cereal harvest.
Canada fleabane size on May 24th, 2011. This is beyond the ideal stage to effectively manage with either herbicides or tillage.
Herbicide resistant weeds by mode of action and county in Ontario.
a pre-plant application of glyphosate + 2,4-D Ester 700 (left) is adequately controlling giant ragweed in soybean that is resistant to glyphosate (right)
covercrops_Van Eerd_2011 A summary of oilseed radish, rye and cereal cover crops and their impact on weed populations in a sweet corn system.
The impact of planting a cereal cover crop (left) compared to no cover crop (right) on weed populations