The rapid progression of corn planting followed by the current wet period prevented many growers from applying preemergence herbicides and nitrogen fertilizer when fields were planted. Both corn and weeds will have emerged in many of these fields by the time field work resumes. Growers in this predicament should adjust their weed management program rather than trying to force their previously planned herbicide treatment into the current situation.
Iowa State University
Hartzler, Robert G. and Pringnitz, Brent A., "Urea-ammonium nitrate as herbicide carrier in emerged corn" (2001). Integrated Crop Management News. 1989.
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