Postemergence Herbicide Applications in Soybean

Weeds can affect soybean yield potential by competing for light, water and nutrients. The time in the growing season when soybean yield potential begins to be affected by weeds is called the critical period. This can vary depending on weed species and density, time of weed emergence in relation to soybean emergence, environmental conditions, and production practices. Roundup® brand glyphosate-only agricultural herbicides should be applied in Roundup Ready®, Roundup Ready 2 Yield®, and Roundup Ready 2 Xtend® soybeans when weeds are 4 inches or less in height for control prior to the critical period to help protect soybean yield potential and maximize profitability.  Where preemergence herbicides were applied at planting, the critical period is generally delayed to later in the season when postemergence herbicide may be necessary.

Learn more about postemergence herbicide applications in soybeans from Roundup Ready PLUS®.​​