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Woody looking zucchini plant stem.

Watch Your Squash! Squash Vine Borer Moths Are Active.

Each year vine crops, including squash, zucchini and pumpkin plants, fall victim to squash vine borer larvae feeding inside their stems.

Mosquito with darker coloration and mosquito with white band on proboscis.

Know Your West Nile Virus Vectors

In some areas of South Dakota, recent precipitation has led to an increase in mosquito activity. To reduce the chances of contracting West Nile Virus, it is important to understand the behavior of the mosquitos capable of vectoring it.

A patty of dung with several holes in it and grass growing through it. It has been broken down by dung beetles.

Dung Beetles and Other Insects Can Help Breakdown Dung and Control Pests

This article summarizes findings related to dung beetle ecology and how dung beetles advance the breakdown of dung pats.

A male and femail dung beetle rolling a ball of dung in a pasture. Courtesy: Beverly Skinner/USFWS (CC BY 2.0)

Managing Livestock for Dung Beetles and Other Beneficial Species

South Dakota researchers have taken a closer look at the function of dung beetles in Eastern South Dakota over the last few years. This article summarizes findings related to management of livestock grazing and chemical pesticides in relation to dung beetle and insect community health.

Green caterpillar with light colored stripe on back. Caterpillar is feeding on green plant.

Monitor Soybean and Sunflower for Alfalfa Webworm Caterpillars

In the last couple of weeks, we have received numerous reports of small green caterpillars in soybean and sunflower. The caterpillars have been described as producing webbing and moving extremely quickly when disturbed.

Green wheat stems with a gray slug feeding on them.

Slugs Causing Issues in Some South Dakota Wheat Fields

Slug activity in wheat fields has been reported in South Dakota. Although slugs are not normally an issue in South Dakota crops, they can pose a threat when field conditions are just right.

Three photos of blister beetles. The first is a black colored blister beetle on a purple flower. The second is a gray colored blister beetle on yellow flowers. The third is an orange-brown colored blister beetle feeding on a green leaf.

Check Alfalfa for Blister Beetle Activity

Blister beetles are becoming more common as we progress through the growing season. Recently, there have been multiple reports of blister beetles showing up in alfalfa fields.

Black caterpillar feeding on green soybean leaf.

Start Scouting Fields for Thistle Caterpillar Activity

Many of our summer insect pests overwinter in the Southern U.S. and rely on wind currents to travel north in the spring and summer. The thistle caterpillar is one of those pests.

Green sunflower leaves with two snails present on them.

Snails Observed in South Dakota Sunflower

Last week we received reports of snail populations causing issues in South Dakota sunflower fields. Snails are normally not an issue in South Dakota crops but like their slug relatives, they can pose a threat to crops when field conditions are just right.

Green and yellow grasshopper resting on a head of wheat.

Grasshoppers Are Causing Concerns in Close-to-Harvest Winter Wheat

During the end of last week, we received reports of grasshoppers feeding on winter wheat that was close to being ready to harvest. One of the questions with the report was, “What insecticide can be sprayed that won’t delay harvest?”