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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

Color-coded map of South Dakota indicating the number of classes of change in drought conditions from June 3 to September 2, 2025. For a detailed description, please call SDSU Extension at 605-688-4792.

Summer 2025 Climate Review and September Outlook

A record wet August in several locations marked the end of South Dakota’s meteorological summer. One challenge coming this fall will be determining how quickly field and crop conditions dry down to allow harvest activities to progress.

Annual trials garden at McCrory Gardens
Apr 07

Garden Hour

Garden Hour will return with as a limited series during the fall and winter months.

Annual trials garden at McCrory Gardens
Feb 03

Garden Hour

Garden Hour will return with as a limited series during the fall and winter months.

Annual trials garden at McCrory Gardens
Nov 25

Garden Hour

Garden Hour will return with as a limited series during the fall and winter months.

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.

A green Palmer amaranth weed surrounded by various other green plants.

Palmer Amaranth Confirmed in Turner County: Is this weed in your fields?

Palmer amaranth has recently been confirmed in Turner County. Currently, the estimation of Palmer amaranth infestations has been confirmed in 18 counties across South Dakota

Adult red sunflower seed weevil on sunflower leaf.

Did Malathion Effectively Manage Your Red Sunflower Seed Weevils?

Now that the August 31 deadline for the application of products containing malathion for red sunflower seed weevil management has passed, it is time to determine if the product was effective. South Dakota State University entomologists have received varying reports on this topic.

Swarm of mosquitoes.

West Nile Virus Update: September 3, 2025

As of August, the South Dakota Department of Health indicated that West Nile Virus positive mosquito pools have been detected in Beadle, Brookings, Brown, Codington, Hughes, Lincoln, and Minnehaha counties.

Left Mosquito specimen with dark coloration. Right: Mosquito specimen with white band on its proboscis.

Mosquitos to Watch for in South Dakota

After many areas in South Dakota experienced heavy rainfalls, mosquitos are now a major issue. Learn which species are most common throughout the state and which carry the highest risk for West Nile Virus.