Soybean Weeds
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Best Management Practices for Soybean Production
This is your unbiased, research-based guide to soybean production to help increase yield, reduce input costs and protect your investment.
All Soybean Weeds Content
Cheap and Simple Soybean Herbicide Programs Do Not Pencil Out
While simple, one-herbicide programs are initially easy on the budget, it is important to consider indirect costs of surviving resistant weeds that reduce soybean yield and produce seed that will have to be managed later.
While Illegal in Tolerant Soybean, Dicamba Can Still Be Applied in Other Crops
While dicamba labels (i.e., Engenia, Tavium, and Xtendimax) for over-the-top applications for tolerant soybeans have been pulled for the 2025 growing season, the herbicide can still be applied in other crops. Below is a guideline for dicamba use in various crops.
Effects of 2,4-D with and without wiper-applied glyphosate on leafy spurge (Euphorbia esula) treated-shoot, shoot regrowth, and root biomass
Fact sheet on the effects of 2,4-D with and without wiper-applied glyphosate on leafy spurge.
Over-The-Top Dicamba Applications Are Not Legal in Soybean for 2025
The registration for dicamba labels for over-the-top applications in tolerant soybeans have been pulled for the 2025 growing season. Many producers are aware of the situation, but planning weed management strategies should start today.
Identification and management of common cocklebur
Fact sheet to help identify and manage common cocklebur.
Identification and management of common ragweed and giant ragweed
Fact sheet to help identify and manage common ragweed and giant ragweed.
Enlist One (2,4-D) and Liberty (Glufosinate) Applied Alone or Mixed During the Day and Night: Weed Control and Soybean Yield Implications
Fact sheet on the research done to determine weed control effectiveness with Enlist One and Liberty alone and tank mixed when applied during the daytime and nighttime.
Current State of Row Crop Weed Management in South Dakota
Results of an online survey to determine how South Dakota stakeholders are currently managing row crop weeds.
Isolated Female Waterhemp Plant Produced Seed: Implications that pollen is in the air
Recent observations by the SDSU Extension Weed Science team highlight that pollen can move far distances to pollinate isolated female plants. This reinforces the need to effectively manage weeds in fields and adjacent areas.
Fall-Applied Residual Herbicides
Many parts of South Dakota can experience dry conditions when residual herbicides are applied, resulting in inadequate weed control. In these areas, residual herbicides can be applied in the fall and take advantage of a longer period to receive activating precipitation.