Skip to main content

Soybean Insects

All Soybean Insects Content

Map of South Dakota of Northern Great Plains and the Western United States. Colors indicate the number of grasshoppers per square yard in each of the sampled locations. For a detailed description, please call SDSU Extension at 605-688-4792.

South Dakota Grasshopper Prediction for 2026

Almost every year in South Dakota there is a risk that grasshopper populations will reach levels capable of causing issues for producers. Unfortunately, our prediction for the 2026 growing season won’t change the trend.

aerial view of South Dakota farm and surrounding land

Crops

During the growing season, SDSU Extension provides weekly production recommendations.

A yellowish-orange beetle with black squares along the back resting on a green plant.

Bean Leaf Beetles in South Dakota

This fact sheet provides an overview of the biology of the Bean Leaf Beetle and management options for South Dakota.

sun rising over South Dakota field

South Dakota Pest Management Guides

The South Dakota Pest Management guides are now available for free. The guides offer recommendations for controlling weeds, insects, and diseases in a variety of South Dakota crops.

Aerial view of the SDSU Southeast Research Farm.
Jan 06

Southeast Research Farm Seminars @ Dakota Farm Show

Join SDSU Extension for a series of educational presentations during the Dakota Farm Show from January 6-7, 2026, at the USD DakotaDome (1101 N Dakota St, Vermillion, SD 57069).

soybean pods

Soybean

SDSU Extension is your partner to increase yields and improve efficiency.

Multicolored Asian lady beetle, female mosquito, and boxelder bug.

Insects Are Being a Nuisance This Fall

The weather is changing, and many of us are noticing an uptick in the nuisance bites caused by several insects. The continued warm weather is going to increase the activity of all insects, including the ones that are causing us displeasure.

Cyst nematode on soybean plant

Integrating Precision Ag Tools for Smarter SCN Assessment and Management

Fact sheet on integrating Precision Ag tools for Soybean Cyst Nematode (SCN) assessment and management

Hand folding back a soybean leaf revealing several soybean aphids.

Should I Spray for Soybean Aphids at the End of August?

Soybean aphid populations are persisting in many soybean fields throughout eastern South Dakota. In many cases, these soybean aphid populations are either at the 250 aphids per plant threshold, or very close.

Small moth with orange, black, and white markings.

Monitor Soybean for Soybean Tentiform Leafminer

In 2022, researchers detected soybean tentiform leafminer in McCook, Minnehaha, and Moody counties in South Dakota. The extent of the distribution of this pest in South Dakota is unknown and is currently being investigated.