As wet weather continues to delay fieldwork across the state, some fields of corn have emerged before the planned preemergence herbicide could be applied. Last week's ICM article on weed management discussed the effectiveness of delayed preemergence applications. Listed below are the herbicides that allow for delayed-preemergence or early-postemergence applications. Be sure to consult product labels to determine specific restrictions concerning delayed-preemergence applications or when tank-mixtures are used.
Iowa State University
Pringnitz, Brent A. and Hartzler, Robert G., "Options for delayed herbicide applications" (1999). Integrated Crop Management News. 2190.
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