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Insect & Pests

All Insect & Pests Content

Examples of three commonly used protective gloves used for pesticide applications.

Pesticide Personal Protective Equipment: Glove Selection

Safety gloves are one of the most-important pieces of pesticide personal protective equipment. Glove material is very important, as not all materials provide the same protection for different pesticide ingredients.

A nest of Asian Needle Ants.

No Documented Sightings of Asian Needle Ants in South Dakota

Despite reports from major news networks citing that Asian needle ants are in South Dakota, we have no evidence that the ant is established or has ever been documented in the state.

Grasshopper with red hind tibia. It’s sitting on a green grass stem.

Survey of Grasshoppers in South Dakota

Fact sheet on the abundance and species diversity of grasshoppers in South Dakota

tall trees in the Black Hills

Tree Pest Alert

From seasonal issues and timely recommendations to disease diagnosis and expert advice, the Tree Pest Alert is a trusted resource for selecting, planting and caring for trees and shrubs all year round.

Green leafhopper with clear wings.

Aster Leafhoppers Showing up in South Dakota Wheat

Aster leafhoppers are present in wheat again this spring. For the last few years, aster leafhoppers have been a common occurrence in South Dakota wheat.

Bird cherry oat aphids, English grain aphids, Greenbugs.

Don’t Forget To Scout for Aphids in Wheat

Aphids are present in South Dakota wheat fields, and that means it’s time to start scouting.

Green aphid with red eyes and cornicles with black tips.

Monitor Alfalfa for Pea Aphid Activity

Pea aphids can cause yield reductions to alfalfa when large populations are present. Prolonged feeding by these populations can even cause the alfalfa fields to take on a “golden” color.

Adult red sunflower seed weevil on a sunflower leaf.

Malathion receives special local needs approval to treat red sunflower seed weevils in South Dakota from July 15 to August 31, 2025

The request was submitted and approved by the Environmental Protection Agency due to the large populations of red sunflower seed weevil present in South Dakota that are resistant to pyrethroid insecticides.

Green corn leaf with ragged holes through-out caused by common stalk borer feeding.

Start Scouting for Common Stalk Borer Activity

Enough degree days have accumulated in some areas of South Dakota for common stalk borer caterpillars to start moving to corn end rows.

Purple-brown caterpillar with orange head on a green corn leaf.

Common Stalk Borer Activity Estimate: June 5, 2025

In the southern counties of South Dakota, degree day estimates indicate that common stalk borer caterpillars are beginning to move from weedy hosts along field edges into corn fields.