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Small, green teardrop shaped insects on a green, soybean stem with pink flower.

Soybean Aphids Detected in South Dakota

While scouting soybean aphids this week we observed small colonies of 5 to 10 soybean aphid nymphs. This indicates that the soybean aphids are just starting to arrive in South Dakota soybeans and weekly scouting for them should be occurring.

Corn and soybean fields with abundant weeds growing throughout.

Inexpensive and Simple Herbicide Programs in Corn and Soybean Will Not Be Effective

While selecting an inexpensive program with only one active ingredient in each application may be tempting due to the current agricultural economy, the result will likely be a more expensive problem in the future.

A green absinth wormwood plant surrounded by other green vegetation.

Absinth Wormwood Spray Window Passed: Mow now and plan to treat the regrowth in the fall

Absinth wormwood is a statewide noxious weed that inhabits cropland, pasture, rangeland, right-of-ways, and waste sites. If not effectively managed, the species can displace desirable vegetation, reduce crop yield and decrease land value.

U.S. Environmental Protection Agency offices in Washington, D.C.

Update on Chlorpyrifos Use in South Dakota

As of June 30, 2025, the labeled uses for chlorpyrifos products for food and feed are limited to alfalfa, soybean, and wheat in South Dakota. Chlorpyrifos can no longer be used to treat sunflowers.

Many green soybean plants within a field that has brown grass and residute.

Burnt Soybeans Look a Lot Better Than Weedy Beans!

Prior to the introduction of Roundup-Ready soybean, growers were accustomed to soybeans exhibiting short-lived herbicide injury. While soybean plants may look unsightly from a PPO-inhibiting herbicide application, a more unsightly view is a soybean field full of weeds.

A sign directs drivers to an SDSU Extension field day

SDSU Extension hosts 5th annual Specialty Crop Field Day

July 24, 2025

South Dakota State University Extension is pleased to announce its fifth annual Specialty Crop Field Day at the SDSU campus in Brookings.

Crop field with various areas highlighted to show variations in crop performance.

Variations in a Field and Variable Rate Technology Adoption

Field variations, including soil properties, nutrient content, and moisture levels, can significantly impact crop yield and farm profits. By understanding the specific needs of different areas, farmers can apply fertilizers, seeds, and other inputs more effectively.

Tree lined hiking trail at Cathedral Spires

Limber Pines of the Cathedral Spires: A Unique Tree

Fact sheet on the history, status and threats of limber pines.

Young tomato plants surrounded by organic mulch in a no-till garden.

Microbial Water Testing for South Dakota Producers

Microbial water testing is important for produce growers to know the quality of their water to help ensure the safety of the fruits, vegetables, and herbs they produce.

Field showing sheet and rill erosion following a heavy rain event.

Soil Erosion Mitigation During Heavy Rainfall Events

Adopting soil health practices that minimize disturbance, increase surface cover and organic matter content, and keep roots growing in the soil can help to increase soil infiltration rates and reduce destruction of soil aggregates from heavy rain.