Topple Weeds with a PRE-POST Combo
18 February 2025
Last update: 05/03/25 10:11
According to a research article recently published in Weed Technology, a journal of the Weed Science Society of America (WSSA), a strategy utilizing both preemergence (PRE) and postemergence (POST) herbicide treatments optimized weed control outcomes in early planted soybean. Researchers conducted their study in 2021 at three locations across Central Illinois.
“The research objective was to examine various herbicide treatments applied at different timings and rates to assess the effect on weed control and yield in early planted soybean,” says Aaron Hager, Ph.D., Department of Crop Sciences, University of Illinois, and corresponding author for the study, and WSSA member scientist. “Overall, we found that treatments comprised of a full rate of PRE followed by a POST resulted in the greatest and most consistent weed control at the final evaluation timing.”
PRE-only treatments failed to perform as well as either POST-only or PRE plus POST herbicide treatments in early planted soybean, points out Hager. “For optimal effect on both weed control and yield, the PRE plus POST combo proved best for early planted soybean,” sums up Hager.
More information about early planted soybean weed control can be found in the article, “Weed Management in Early Planted Soybean – Early Planted Soybean Weed Management as Effected by Herbicide Application Rate and Timing.” The article is among the first available in 2025 from Weed Technology, a Weed Science Society of America journal, published online by Cambridge University Press.
About Weed Technology
Weed Technology is a journal of the Weed Science Society of America, a nonprofit scientific society focused on weeds and their environmental impact. Weed Technology publishes original research and scholarship in the form of peer-reviewed articles focused on understanding how weeds are managed. The journal focuses on applied aspects concerning weed management in agricultural systems, weed/crop management systems, new weed problems, new technologies for weed management, herbicides used to manage undesired vegetation, and special articles emphasizing technology transfer to improve weed control. To learn more, visit www.wssa.net.
Featured Image: Left: Early-planted soybean at POST; Right: Conventional-planted soybean at POST. By, Aaron G. Hager
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