Content by Adam Varenhorst

Squash vine borer moth on plant.

Squash Vine Borer Activity Estimate: June 21, 2023

Squash vine borer moths will soon emerge across much of South Dakota, and their larva can cause serious damage to squash plants. See our latest activity predictions and management recommendations based on forecasted conditions from around the state.

Left: Common asparagus beetle adult. Right: Twelve-spotted asparagus beetle adult.

Asparagus Beetles Active in South Dakota

Two insects that we recommend scouting for in asparagus are the common asparagus beetle and the twelve-spotted asparagus beetle. Learn how to identify and manage both before they cause serious issues in your garden.

Mottled brown grasshopper nymph sitting on a green leaf. Wing pads are easily observed in the image.

Grasshoppers Continue to Be an Issue During 2023

We have received numerous reports of very large populations of grasshopper nymphs in June. Before management action is taken, it is important to determine what stage observed grasshoppers are at.

Striped cucumber beetle and spotted cucumber beetle.

Striped Cucumber Beetles Are Active in South Dakota

South Dakota is home to two species of cucumber beetles that can cause severe injury to cucurbits, including squash, cucumbers, melons and pumpkins. Learn how to detect and manage both beetles before they impact your harvest.

Squash vine borer moth on plant.

Squash Vine Borer Activity Estimate: June 16, 2023

Squash vine borer moths will soon emerge across much of South Dakota, and their larva can cause serious damage to squash plants. See our latest activity predictions and management recommendations based on forecasted conditions from around the state.

Dark green and tan curled caterpillars with an orange stripe along their sides.

True Armyworm Caterpillars Found in South Dakota

Although true armyworms can feed on numerous crops, they are primarily an issue for corn and wheat. True armyworm caterpillars feed on leaves and can cause severe defoliation when large populations are present.

Gray beetle on a green alfalfa leaf.

Blister Beetles Are Active in South Dakota

A common pest of alfalfa, blister beetles pose serious health risks to livestock if their bodies are consumed along with alfalfa bales. Learn some important considerations for identifying and managing blister beetles before harvesting alfalfa this growing season.

Numerous nymph grasshoppers feeding on corn.

Large Grasshopper Populations Detected in South Dakota

Very large populations of grasshoppers have been detected in southeastern South Dakota. Although these grasshoppers aren’t causing serious defoliation in crops yet, there is the possibility that they will as the season progresses.

Greenish brown bugs on a white sweep net cloth.

Alfalfa Plant Bugs Showing Up in Abundance

Several insect pests have been showing up early in alfalfa this season, including the alfalfa plant bug. Learn how to identify, scout, and manage this pest before it impacts your alfalfa yields.

Bean leaf beetle feeding damage on young soybean plants.

Time to Start Scouting for Bean Leaf Beetles

With soybean emergence underway, the next concern is early-season bean leaf beetle defoliation. Learn some expert tips for scouting and managing them before they impact yields.