Soybean Insects

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soybean pods

Best Management Practices for Soybean Production

This is your unbiased, research-based guide to soybean production to help increase yield, reduce input costs and protect your investment.

All Soybean Insects Content

A yellow beetle with a black head, and square black markings on its back standing on a soybean leaf.

South Dakota Overwintering Bean Leaf Beetle Predicted Mortality: 2024-2025

Each year we evaluate the overwintering success of bean leaf beetles in South Dakota. For adult bean leaf beetles that successfully overwintered, emergence will begin in the spring and they will move into soybean fields.

2025 Rangeland Grasshopper Hazard map. Photo Courtesy of USDA APHIS, PPQ. ALT TEXT: 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 2025

In 2025, it is likely that grasshopper populations will once again reach levels capable of causing issues in some areas of the state. Scouting should begin shortly after planting in areas where they were problematic in 2024 and continue throughout the growing season.

A fly with a metallic body, long legs, and clear wings with smoky markings.

Flying Gems: Long-Legged Flies

Whether scouting for pests in crops or in a garden, chances are you’ve encountered a long-legged fly. These insects provide essential biocontrol of many insect pests and should be encouraged in the landscape.

A black and yellow striped fly with large red eyes resting on a flower. The fly is covered in yellow pollen.

It’s a Bee! It’s a Wasp! No, It’s a Hover Fly!

Many types of insects are responsible for some degree of pollination in landscapes. In this article, we will focus on the syrphid fly as both an important pollinator and a beneficial insect predator.

A metallic blue-green tiger beetle feeding on a light green caterpillar.

Tiger Beetles: Beneficial Predators and Ecosystem Health Indicators

Tiger beetles are generalist predators, meaning they prey on a wide variety of pests. Observing them in a landscape is a great sign that an ecosystem is healthy and supporting both prey and predators.

Top profile of an insect with an orange head and second body segment, and a shiny, almost iridescent black abdomen.

Ground Beetles: Predators That Provide Benefits in Agricultural Landscapes

For agroecosystems and gardens struggling with weeds and insect pests, ground beetles can be a beneficial predator. Learn the benefits they can bring to your landscape this growing season.

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.

Beef cattle in a snow covered feedlot

SDSU Extension to provide educational sessions during 2025 Dakota Farm Show

December 19, 2024

South Dakota State University Extension will provide a day of educational sessions for crop and cattle producers during the 2025 Dakota Farm Show in Vermillion.

Bottom side of a soybean leaf revealing a sever soybean aphid infestation.

Management Recommendations for Soybean Aphids

In many fields across eastern South Dakota soybean aphid populations have reached economic thresholds, and there have been a lot of questions regarding the best approach to managing the 2024 outbreak.

Small, green teardrop shaped insects on a green, soybean stem with pink flower.

It’s Time to Scout for Soybean Aphids

Small populations of soybean aphids were observed this week while scouting. Early scouting will ensure that populations do not rapidly increase and exceed the recommended economic threshold.