Content by Patrick Wagner

Soybean Aphid Populations Have Reached Economic Threshold

Based on recently scouting observations, the economic threshold for soybean aphids has been reached. Once thresholds are reached, fields should be reevaluated in 3 to 4 days to confirm the populations didn’t decrease, and if they persist or increase, they should be treated.

SDSU Extension experts win national agricultural association awards

July 30, 2026

South Dakota State University Extension experts were recognized nationally for their excellence in outreach and Extension programming.

It’s Time To Scout for Soybean Aphids

While scouting soybeans last week, we observed small populations of soybean aphids. These populations suggest that the infestation was recent. In 2025, we observed similar small infestations that took a long time to increase.

Monitor Your Corn for Corn Rootworm Adults to Inform Management for Next Year and to Avoid Substantial Silk Feeding

Corn rootworm adults are active across South Dakota, and as a reminder, it’s a good time to scout to determine if your fields have a rootworm issue.

To Avoid Loss of Viable Seeds This Year, Keep an Eye Out for Banded Sunflower Moths in Sunflower

Banded sunflower moths are active in South Dakota, which means it is time to start scouting sunflowers for their eggs. The caterpillars of banded sunflower moths are capable of reducing yields and oil content by feeding on the developing florets and tunneling into developing seeds.

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.