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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.

A hand holding a brownish gray moth with a valley of green grass and trees in the background.

Army Cutworm Migration Swarms Detected in Western South Dakota

Mass populations of army cutworm moths are being reported to entomologists at South Dakota State University. Thus far, these migratory swarms have only been observed in far western South Dakota, particularly within the Black Hills.

A green corn leaf with yellow to brown spots throughout.

Corn Disease Update: September 2, 2025

As of September 2, 2025, a number of corn diseases have been reported and confirmed throughout South Dakota. View our latest findings as we approach the fall harvest season.

Harvested crop field with deep soil ruts left by equipment tires.

How to Avoid Soil Compaction During Crop Harvest

Soil compaction can degrade soil health and lead to reduced crop yields. Learn some production practices that can implemented during harvest to avoid soil compaction.

Private Applicator Endorsements for M-44 Devices, Fumigants, and Aerial Applications

Recent changes to South Dakota private applicator pesticide regulations have impacted the requirements to use M-44 predator-control devices, fumigants, and to apply pesticides from aerial vehicles.

Effects of Different Cereal Rye and Winter Camelina Seeding Rates on Biomass Production and Soil Properties When Broadcast Seeded

Benefits to soil health generally increase as cover crop biomass production increases. Recent research sought to determine how the seeding rate of two cover crop species and mixtures affected biomass production and some soil health indicators.