Skip to main content


All Soybean Content

Four photos depicting field progress for corn, winter wheat, oats and soybean as of July 10, 2020.

Follow the Fields Tour

Follow the field crops during the 2020 growing season.

aerial view of South Dakota farm and surrounding land

Pest & Crop Newsletter

SDSU Extension publishes the South Dakota Pest & Crop Newsletter to provide growers, producers, crop consultants, and others involved in crop production with timely news pertinent to management of pests, diseases, and weeds in South Dakota.

Green soybean plant with white mold present on the stem and pod.

Start of Flowering Is the Ideal Time for White Mold Management in Soybeans

Some early planted soybeans are starting to flower (R1 growth stage). One soybean disease that needs to be managed at this growth stage is white mold.

Small, green soybean aphids on a green, soybean stem with pink flower.

Don’t Get Surprised. Start Scouting for Soybean Aphids.

Soybean aphid populations have been observed in neighboring states and in very small populations in South Dakota. It is a good reminder that soybean aphid scouting should occur throughout the growing season to prevent population outbreaks and yield loss.

An adult, brown-to-black millipede feeding on a green leaf.

Millipedes May Be Responsible for Reduced Soybean Stands in 2020

When we think of millipedes, it is usually as a nuisance pest indoors. However, there have been reports in South Dakota and neighboring states of millipedes being more than just a nuisance in 2020.

Small soybean plants that have been cut and are laying on the ground. Curled up caterpillars are present near the plants.

Scout Soybean for Black Cutworm Activity

Typically, we are concerned with black cutworm activity in corn fields. However, 2020 has been anything but a typical year and we are instead concerned with black cutworm activity in soybean fields.

County map including portions of South Dakota, Minnesota, Nebraska and Iowa

Soybean Gall Midge Adults Emerging in South Dakota

Over the weekend, a SDSU Extension collaborator reported that soybean gall midge adults had been captured in Southeastern South Dakota. These are the first adults that have been observed in South Dakota in 2020.

A red, tractor-mounted sprayer with its tank being flushed by a hose connected to a large truck.

Alternatives to Postemergence Dicamba Applications

Cancellations of three dicamba labels on June 6, 2020 by the U.S. Environmental Protection Agency, left many farmers looking for options for effective weed control this summer.

Small white maggot next to a brown pill shaped pupa. Both a on soil with a yellow tape measure behind them

Watch for Seedcorn Maggots in Emerging Soybean

Of all of the potential early season pests, the seedcorn maggot is rarely an issue in South Dakota. However, we have started receiving reports of soybean fields that have poor emergence or seedling stand reductions occurring.

a map showing the precipitation outlook for June 2020

Summer 2020 Climate & Drought Outlook

May 22, 2020

With alternating cool and warm weather patterns throughout the last few months and the summer season ahead, temperature continues to be a challenge for climate forecasters in South Dakota.