Written collaboratively by Adam Varenhorst, Zachary Loomis, Patrick Wagner, Bradley McManus, Eric Jones, and Philip Rozeboom
Fact sheet on Dectes stem borer in South Dakota soybeans.
This publication was developed through funding from South Dakota State University Extension and the National Institute of Food and Agriculture, Crop Protection and Pest Management Applied Research and Development Program grant 2024-03471.
There have been a few fields this week that were infested with soybean aphids that are getting closer to threshold. We have also received reports of insecticides being applied to manage soybean aphids in South Dakota.
Recent reports of crop loss along field edges indicate that grasshopper populations in some areas of South Dakota are well above threshold. Unfortunately, crops are often the target of these moving populations.
While scouting soybean this week, we noticed an uptick in redheaded flea beetle activity. In the fields that we scouted, defoliation levels were still very low at less than 5%.