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
How Well Will Pre-Emergence Herbicides Work in 2021?
It is always good to start with a pre-emergence program to prevent weeds from becoming resistant. With the spring starting out below normal in subsoil, there are questions as to how well preemergent herbicides will work.
2021 South Dakota Pest Management Guides Now Available
February 04, 2021
SDSU Extension has released the 2021 South Dakota Pest Management Guides.
Use the SD Spray Tool for Inversion Detection and Weather for Pesticide Application
The SD Mesonet Spray Tool provides real-time weather data for pesticide applicators. This dedicated website for pesticide applicators uses the SD Mesonet weather data, which is updated every five minutes.
Grassy Weeds
Grassy weeds are a problem in all field crops. They must be identified at early stages of growth so they can be controlled before crop yields are seriously threatened. Control measures are not the same for all grassy weeds, so accurate seedling identification is important.
Checking Weed Control at Harvest
With harvest now in full swing, don’t forget to look at your fall weed control. What are the weeds that are left in your crop? Do you know what weeds they are? Is there a weed that you do not know?
SDSU Extension Weed Evaluation Extension Demonstration Available at South Dakota State Fair
September 01, 2020
The SDSU Extension Weed Evaluation Extension Demonstration project will be available to the public at the South Dakota State Fair September 2-September 7.
Is Herbicide Carryover a Concern in Wet Weather?
Wet conditions have forced the need to change planting plans. In some cases, crops are planted in areas that were not planned for that crop this year. One factor in moving crops that cannot be overlooked is carryover. Does the ground to be planted have a carryover restriction for the desired crop to be planted?
Glyphosate Resistance in Soybeans
Many weeds have developed glyphosate resistance in the past few years. Many producers who use Roundup Ready soybeans have a temptation to rely on glyphosate products to control post-emergent weeds, causing them to potentially become resistant to the chemical. If producers are unable to gain control over the weed, then weed competition will cause a significant yield loss.
SDSU Research Shows Effects Of Volunteer Corn In Corn And Soybeans
In 2007, researchers at South Dakota State University indicated that volunteer corn is much less competitive in corn than soybean. The South Dakota study (Alms et al. 2007) evaluated the full season effect of a range of volunteer corn densities (800-14,000 plants/acre) on both corn and soybean and reported yield losses that ranged from 0% to 13% in corn and 0% to 54% in soybean.
Spring Dandelion Control In Soybeans
Dandelion has become much more of a problem as farming practices have changed. Less tillage and increased use of glyphosate resistant crops along with reduced use of residual herbicides have allowed some perennial weeds such as dandelion to prevail.