Yield Penalty Due to Delayed Weed Control in Corn and Soybean
S. Z. Knezevic, S. P. Evans, and M. Mainz
February 2003
Research
The widespread use of glyphosate-resistant crops has raised two common questions: when is the best time for postemergence weed control; and what is the cost of a delayed weed control operation? These studies found the effects of three N rates in corn and of three row spacings for soybean on the critical period for weed control. Also, a percent yield loss per leaf stage of delay was determined.
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