As the SDSU Extension Field Crop Entomologist Adam serves South Dakota stakeholders by addressing insect pest issues in field crops. He conducts applied research that focuses on corn, soybean, wheat and sunflower. Additionally, he assists the other extension entomologists to address questions pertaining to insect questions for the home and garden, urban insect pests and general entomology questions.
Adam Varenhorst
Associate Professor & SDSU Extension Field Crop Entomologist
Also by Adam Varenhorst
Vertento® Insecticide Approved for Red Sunflower Seed Weevil Management
Recently the Environmental Protection Agency approved a Section 18 Emergency Exemption label for Vertento® Insecticide for use on sunflowers for red sunflower seed weevil management in South Dakota. This exemption is effective from July 15 to August 31, 2026.
Fly Management for Cattle
There are several species of flies that can reduce the production value of livestock, particularly during hot, dry weather. To manage these pests, it’s important to be able to accurately identify them and understand their life cycles.
Large Grasshopper Nymph Populations Detected in Southeast South Dakota
This week we received several reports of large grasshopper populations originating from southeast South Dakota. The populations were well above threshold and actively defoliating crops.