"Waterhemp is a very aggressive weed species with a large window of emergence, capable of producing hundreds of thousands of seeds that create a persistent seed bank."
"The average yield impact of waterhemp is 43 percent, with losses of up to 100 percent in highly competitive environments, making early identification critical."
"A single post-emergence application is not going to be effective; instead, a layered herbicide program with residual herbicides followed by post-emergence passes is necessary."
Waterhemp is aggressively spreading across Ontario, threatening soybean yields significantly. It can reduce yields by an average of 43%, with potential losses up to 100% in competitive environments. Accurate identification is crucial, as waterhemp has distinct characteristics compared to other pigweeds. A multi-pronged management strategy is essential, including regular scouting, spot spraying, equipment sanitation, diversified crop rotations, and layered herbicide programs. Non-chemical methods like tillage and cover crops can also aid in controlling waterhemp effectively.
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