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Green Caterpillars Causing Defoliation in Soybean

This week we observed several species of caterpillars in soybean fields. The most common species were the green cloverworm and the cabbage looper.

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.

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.

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.

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.

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.

SDSU Extension Heirlooms Wisdom Writing workshop available online for first time

July 24, 2025

South Dakota State University Extension is pleased to announce that the Heirlooms: Wisdom Writing Workshop is now available through a virtual platform for the first time.

Spring Storm Fronts Impact Calving Patterns

While the changes in calving patterns in association with weather fronts is nothing new to producers, it is beneficial to keep this in mind as calving season shifts into high gear. Cold fronts are the type of weather systems that will create the pressure and temperature changes associated with increased birth rates.

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.