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Growing Soybeans

All Growing Soybeans Content

Four photos depicting field progress for corn, winter wheat, oats and soybean as of August 31, 2020.

Follow the Fields Tour

Follow the field crops during the 2020 growing season.

A map of South Dakota counties shaded to indicate the year for which the soybean cyst nematode was detected.

HG Type Testing: A Management Strategy for Soybean Cyst Nematode Control

Have you noticed lower soybean yielding areas in your field? Soybean cyst nematode may be to blame. Fall, and especially after soybean harvest, is the best time to sample soil and have it tested for soybean cyst nematode.

One-month precipitation outlook map for September 2020. South Dakota has a 40-50% chance of below-normal precipitation.

September 2020 Climate & Drought Outlook

Summer has its last hurrah the first week of September before we see potential for our state’s first freeze of the fall season, according to NOAA’s Climate Prediction Center.

A soybean field with plants yellowing and dropping leaves in larger portion of the field while the rest of the field has green soybean plants.

Drought Stress or Stem Canker Killing Soybean Plants?

Several soybean fields scouted in a number of Eastern counties have plants dying or dropping leaves prematurely. While the majority of these fields have drought stress causing early senescence, a few fields have also stem canker developing

Left: A soybean plant with cotton white mycelia girdling the lower portions of the stem amidst healthy soybean plants. Right: A soybean field with some plants having yellowing leaves due to sudden death syndrome infection.

White Mold and Sudden Death Syndrome Starting to Develop

White mold and sudden death syndrome are starting to develop in a number of soybean fields. These two diseases develop starting at the soybean flowering growth stage and can occur throughout the rest of the soybean growing season.

Left: Green soybean plants covered with yellow and brown spots indicative of frogeye leaf spot infection.  Right: Green soybean trifoliate that is covered in brown spots.

Deciding on Fungicide Application to Manage Mid-Late Season Soybean Leaf Fungal Diseases

Soybean leaf diseases can develop in some soybean fields to reach yield-reducing levels. The question that growers often ask is whether it is profitable to apply a fungicide to soybeans at the R3/R4 growth stage 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.

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

August 26, 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.