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West Nile Virus Update: September 26, 2025

As of September 26, 2025, the South Dakota Department of Health (SD DOH) reported 74 human cases of West Nile Virus from Aurora, Beadle, Bon Homme, Brookings, Brown, Charles Mix, Clay, Codington, Corson, Douglas, Grant, Gregory, Haakon, Hamlin, Hand, Hughes, Hutchison, Hyde, Lawrence, Lincoln, Marshall, Meade, Miner, Minnehaha, Pennington, Roberts, Sanborn, Spink, Stanley, Union, Walworth, and Yankton counties.

Sprawling rangeland enrolled in the conservation stewardship program.

SDSU Extension professionals win range management awards

February 12, 2024

Two South Dakota State University Extension experts have received awards from the Society for Range Management for their contributions to range science education and outreach.

Mosquito resting on a dandelion seed head.

West Nile Virus Update: Sept. 17, 2021

The South Dakota Department of Health's latest update indicated that West-Nile-virus-positive mosquitoes were detected in Beadle, Brookings, Brown, Codington, Hand, Hughes, Lincoln and Minnehaha counties in South Dakota.

Small herd of mixed cattle grazing rangeland in late fall.

S.D. Producers’ Willingness To Adopt Patch Burn Grazing vs. Winter Patch Grazing

Patch-burn grazing and winter patch grazing are heterogenous rangeland management practices that aim to increase the variety of grass composition to benefit wildlife and maintain livestock production. To learn about producers’ desire to adopt these practices, we conducted an online survey between November 2019 and January 2020.

South-facing view of a dry, rolling field at the Oacoma station.

SDSU Extension to host 2023 South Dakota Climate Summit

July 14, 2023

South Dakota State University Extension will host a South Dakota Climate Summit on Aug. 1-2, 2023, at the Arrowwood Resort in Oacoma, South Dakota.

Former cropland replanted with a variety of grasses and broadleaf plants.

Replanting Cropland Back to Grassland

Planting cropland back to grassland takes some planning regarding previous herbicide use, soil fertility and seed bed preparation. The first step is to identify what resources are currently available to help you reach your objectives and what problems may need to be addressed.

Left: Soil from long-term no-till field, exhibiting good soil aggregation through clumping and smaller pieces of soil. Right: Soil from conventionally managed field that included tillage and crop residue removal. Notice the soil is lighter brown, indicating lower organic matter, and the pieces of soil are in larger chunks with no visible indication of clumping or structure.

Organic Agronomy Starting to Impact

For decades scientists have known that a handful of soil contained more micro-biological organisms than the number of humans on earth. Science is just beginning to discover these organisms and learn about their functions and contribution to their soil ecosystem.

A group of brown cattle foraging in a green field.

Prussic Acid Poisoning

As the first frost date approaches, producers often have concerns about the risk of prussic acid poisoning in livestock. Certain forage plants, especially sorghums and related species are associated with an increased risk of death loss because of prussic acid poisoning.

Herd of cattle swath grazing hay in a winter pasture.

Swath/Bale Grazing

Swath grazing and bale grazing are harvest systems that mesh haying and grazing techniques. Generally, the objective is to reduce labor and equipment expenses by allowing livestock to consume the hay crop in the field.

A color-coded map indicating the average date of 32 degree temperatures across various Midwestern states.

Fall Frost and September Climate Outlook for 2019

This year’s struggles with weather and climate are continuing this fall. Late planting of corn and soybeans in the spring have now combined with near average or cooler than average summertime temperatures. This combination has led to slow crop growth and the need for an extended frost-free season to ensure these crops reach maturity.