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Northern Illinois Agriculture

University of Illinois Extension
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Big weeds


Weather conditions have pushed back many post herbicide applications. This is most obvious in soybean fields where oversized  Giant ragweed, Marestail, and Waterhemp are showing varying degrees of injury from post herbicde applications. The success of the post applications will be dependent partially on environmental conditions and are far from guaranteed. Growers are encouraged to keep an eye on these large weeds to measure the success of eliminating the weeds and to have a backup plan in place.


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