By Kurt Vollmer
In 2025, studies were conducted to explore the effectiveness of mixing different herbicides for controlling weeds in herbicide-tolerant (E3) soybean. Studies focused on two main factors: applying the herbicides at different times and using a combination of products that have both foliar and residual activity.
Using a mix of herbicides with different sites-of-action can help control a wider range of weed species. It’s a more reliable strategy than simply rotating herbicides year after year. By targeting multiple biological processes, the likelihood of a weed developing resistance to one specific herbicide is greatly reduced. However, it’s important to remember that some herbicides are great for immediate weed control, but herbicides with residual activity are often needed to ensure weeds don’t come back later in the season.
The study was conducted at the Wye Research and Education Center, as well as a grower’s field in Cordova, MD. Treatments evaluated both conventional and organic herbicides to see how well mixing different products worked when applied to emerged weeds (Table 1). Conventional treatments included Reflex and Enlist One, either alone or mixed together or with Dual Magnum. Organic treatments included Axxe and Homeplate, either on their own or in combination. A non-chemical method, flame-weeding, was also included.
Source : umd.edu