Whether or not corn was damaged by frost, it will be under stress following the recent period of cool, wet weather. Whenever possible, it is best to avoid applying herbicides to stressed corn since the crop is less efficient at metabolizing the herbicide to non-toxic compounds.
Iowa State University
Hartzler, Robert G., "Weed Control in Weather-Stressed Corn" (2010). Integrated Crop Management News. 437.
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