Slow canopy development and ample soil moisture have led to many fields being reinfested with weeds following postemergence herbicide applications. While late-emerging weeds are much less competitive than weeds that emerge early in the season, at high densities they can impact yields, and regardless of density, these weeds can produce significant quantities of weed seed. Thus, it is likely that many soybean fields will be treated in the next few weeks.
Iowa State University
Hartzler, Robert G., "Late-Season Herbicide Applications in Soybean" (2009). Integrated Crop Management News. 596.
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