Abstract
Early Postemergence and Sequential Herbicides for Weed Control in Corn
Highlights
Herbicides such as Acuron, Degree Xtra, Resicore, and Warrant were applied preemergence to corn to provide residual weed control until the crop became established and competitive with the weeds
Minor corn injury occurred with some herbicides applied early postemergence or postemergence, but did not persist
All herbicide treatments increased grain yield 56 to 78% compared to the weedy control, but yields did not differ between herbicide treatments
Summary
Herbicides such as Acuron, Degree Xtra, Resicore, and Warrant were applied preemergence to corn to provide residual weed control until the crop became established and competitive with the weeds. As resistance issues to postemergence herbicides have increased, applying reduced rates of these residual herbicides preemergence and as part of a planned postemergence application has become increasingly popular. Applying these herbicides in a sequential program extends the residual weed control and increases the modes of action used in the postemergence component. The objective of this study was to compare residual herbicides applied sequentially at split rates for efficacy in corn
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