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Corn, soybean and even wheat weed control chemistry has changed in the last few years to meet the challenges of herbicide resistant weeds. To meet the growing weed control challenges, new residual herbicide products (Group 4, 27 and 14) are popular for difficult to control weeds. Control of weeds like waterhemp has added complexity and carryover risk to herbicide programs. Herbicide resistance to common weed control programs (based on glyphosate) has required adding residual chemistry, new compounds and combinations to achieve acceptable weed control in grain crops.
However, a concern many alfalfa producers are experiencing is slow growing, thin, weak, or poor looking alfalfa stands following grain crops. These situations are not for lack of soil fertility, caused by soil diseases or other pests. Residual herbicide activity can attribute to poor looking alfalfa stands during establishment.
National alfalfa agronomist, CROPLAN® by WinField United
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