Insect & Pests

All Insect & Pests Content

Moth with green metallic wings and an orange body resting on a green leaf.

Squash Vine Borer Moths Are Active

Squash vine borer moths have been observed in South Dakota gardens. Now that we know they are active, it is important to take steps to ensure that they don’t have a negative impact on our squash plants.

Bed bugs grouped together where the fabric and wood join on a box spring.

Bed Bugs: What You Need To Know

When it comes to household pests, bed bugs can make almost anyone cringe. These tiny, vampire-like critters are pests of humans and can become a persistent problem when they infest homes.

Tan grasshopper with light colored stripes on its back sitting on the soil surface.

Will Grasshoppers Be an Issue in 2021?

With much of South Dakota experiencing dry conditions this year, grasshoppers are one of the insect pests that will need to be monitored. Large grasshopper populations may cause economic loss in cash crops and reduce forage in range and pasture lands.

Soybean plants cut by cutworm caterpillars.

Dingy Cutworms Observed in South Dakota Soybean

Dingy cutworms have been reported in South Dakota soybean. Although they are not normally a major pest of soybean, dingy cutworms will often defoliate soybean leaves and can cause significant stand reductions by cutting plants.

Canola leaves with irregular holes.

Flea Beetles Still Feeding in Canola

Large populations of flea beetle adults have been observed on canola this week. In one field we scouted, flea beetle populations were large and causing significant amounts of defoliation.

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

Common Stalk Borer Activity Estimate: June 10, 2021

The hot temperatures last week have resulted in a large increase in degree days for common stalk borer. Common stalk borers should now be scouted for in areas around Hot Springs, Lemmon, Mission, Pierre, Winner, Huron, Mitchell, Tyndall, Sisseton and Vermillion.

Two mosquitoes, the one on the left being darker in color and the one on the right having a white band on its extended mouthpart. The white band is indicated with a red circle drawn over the picture.

Will Mosquitos Be an Issue During This Summer?

Although it may seem like mosquitos won’t be an issue this year due to drought conditions, it is important to remember that they don’t require large bodies of water to reproduce. Mosquitos can utilize standing bodies of water, small puddles or even stagnant water in containers or old tires.

Green caterpillar with prolegs at the end of its body that form “V” shape.

Diamondback Moth Caterpillars Active In South Dakota

Diamondback moth caterpillars have been observed in South Dakota gardens. These pests feed primarily on cole crops, such as broccoli, Brussel sprouts, cabbage, cauliflower and kale, leaving behind irregular-shaped holes.

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

Earwigs Are Active

Although earwigs typically prefer wet conditions, quite a few have been observed so far this year. It’s important to remember that watering lawns or potted plants around the house provides ideal earwig habitat.

Brown caterpillar with 3 pale stripes running the length of its body. The head is tan.

Bronzed Cutworms Are Active

Bronzed cutworms can damage turf by clipping blades of grass close to the soil surface. Feeding by bronzed cutworms in lawns will result in small, brown circular patches, and large populations can result in extensive lawn injury.