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Insect & Pests

All Insect & Pests Content

Green soybean with wilting/dying soybean within the same row.

Soybean Gall Midge Larvae Detected in South Dakota Soybean

Soybean gall midge larvae have been detected in southeastern South Dakota. Although the infestations probably won’t result in plant death in many fields in 2022, the infestations could be a source for soybean gall midge adults in 2023.

A reddish black fly with beaded antennae resting on a plant.

Hessian Fly: Preventing Outbreaks in Wheat

Hessian flies (Mayetiola destructor) are tiny, gnat-like flies. Their larvae are considered serious pests of wheat and occasional pests of barley and rye.

Brown insect with two pincher like appendages at the end of its body.

An identification guide for Home and Building Arthropod Pests - Insects, Spiders and Other Invaders in South Dakota

Identification guide to assist with identification and management of home and building arthropod pests (insects, spiders and other invaders).

a Black and yellow garden spider on its web.

An identification guide for Common Spiders in South Dakota

Identification guide to assist with identification and management of common spiders.

Cream colored larvae feeding on sunflower seed.

An identification guide for Sunflower Insect Pests in South Dakota

Identification guide to assist with insect identification and management in sunflowers.

Gray tear drop shaped bugs feeding on a yellow squash.

Squash Bugs Are Active in South Dakota

Squash bugs are an insect pest that everyone dreads finding in their garden. If left unmanaged, injury caused by their extensive feeding can kill infested squash and cucurbit plants.

A pasture containing a mixture of grasses and alfalfa.

Grasshopper Activity Is Ramping Up

We have already observed increased grasshopper activity in many areas of the state and, depending on the 2022 season, they may become problematic in crops.

White canvas material covered in dark colored aphids.

Cowpea Aphid Populations Taking off in Alfalfa

In southeast South Dakota, we are observing large cowpea aphid populations in alfalfa. Large populations can reduce yields, and, if left unmanaged, these infestations even kill the plants.

Three beetles. From left: Black colored blister beetle on a purple flower. Gray colored blister beetle on a green alfalfa stem. Orange-brown colored blister beetle feeding on a sunflower head.

Blister Beetles Are Active in South Dakota Alfalfa

Blister beetles have been spotted in several alfalfa fields in South Dakota, which means it’s time to start scouting to determine how many are present.

Small fly with black and white alternating bands on legs.

Soybean Gall Midge Adults Detected in South Dakota

Soybean gall midge emergence was first detected in South Dakota two weeks ago, during the week of June 13 -17, 2022. Emergence continues to be slow, with the only observations in southeast South Dakota.