Economically Damaging Soybean Aphid Populations Detected

Aug 11, 2026

By Adam Varenhorst and Philip Rozeboom et.al

Soybean aphid populations continue to grow in South Dakota. This week, counts near Volga, South Dakota ranged from approximately 280-700 aphids per plant. The Economic Injury Level for soybean aphids is 674 aphids per plant. Observations of these populations indicate that they are healthy and will continue to increase. Scouting for soybean aphids should be occurring throughout South Dakota to ensure that infestations do not cause yield loss. Based on the current soybean stage, scouting should continue for approximately two more weeks or until the R6 growth stage is reached. Review our previous article for more information on speed scouting and the speed scouting fact sheet.

We do not recommend using pyrethroid class insecticides to manage soybean aphids in South Dakota. Previous research has identified pyrethroid resistant soybean aphids across most of Eastern South Dakota. Reports from recent years confirm that these active ingredients do not effectively reduce the soybean aphid populations. For a list of labeled insecticides, please refer to the current edition of the South Dakota Pest Management Guide: Soybean.

Source : sdstate.edu

Video: Dicamba Returns for Georgia Farmers: What the New EPA Ruling Means for Cotton Growers

After being unavailable in 2024 due to registration issues, dicamba products are returning for Georgia farmers this growing season — but under strict new conditions.

In this report from Tifton, Extension Weed Specialist Stanley Culpepper explains the updated EPA ruling, including new application limits, mandatory training requirements, and the need for a restricted use pesticide license. Among the key changes: a cap of two ½-pound applications per year and the required use of an approved volatility reduction agent with every application.

For Georgia cotton producers, the ruling is significant. According to Taylor Sills with the Georgia Cotton Commission, the vast majority of cotton planted in the state carries the dicamba-tolerant trait — meaning farmers had been paying for technology they couldn’t use.

While environmental groups have expressed concerns over spray drift, Georgia growers have reduced off-target pesticide movement by more than 91% over the past decade. Still, this two-year registration period will come with increased scrutiny, making stewardship and compliance more important than ever.