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The importance of a preemergence herbicide program for row crops

Difficult weeds, especially glyphosate-resistant weeds, are controlled most consistently with soil-applied herbicides which kill germinating seeds/seedlings. Much of the resistance to glyphosate has developed from over-reliance on postemergence herbicide applications for weed control. Thus it is essential to include one or more of the preplant and preemergence residual herbicides available for summer row crops. The specific herbicide you use, although important, is usually less important than just making the decision to use a preplant or preemergence herbicide.
It is important to use multiple modes of action when selecting herbicides. To assist growers, the Weed Science Society of America has ...


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