Content by Connie Tande
South Dakota Wheat Streak Mosaic Virus Disease: 2026 Update
Wheat streak mosaic virus is on the move across South Dakota wheat fields. Due to the mild winter and overwintering in winter wheat, viral activity has had a jump start in 2026, and the occurrence and intensity of disease pressure is comparable to the 2025 season.
Northeast Research Farm Tour
Attend the annual Northeast Research Farm Tour on Thursday, July 23, 2026, from 4:00 p.m. CDT to dusk at the Northeast Research Farm (15710 455th Ave. South Shore, SD 57263). The farm is located on the junction of State Highway 20 and Codington County Highway 11, or 2.5 miles west of Exit 193 on I-29.
Black Rot of Brassica Crops
Overview and management of Black Rot for Brassica Crops.
Wheat Streak Mosaic Virus Confirmed in 2026
At the end of April, a winter wheat sample was submitted to the Plant Diagnostic Clinic displaying typical viral symptoms of chlorosis and streaking. Upon testing, this sample was determined to be positive for Wheat Streak Mosaic Virus.
Grass Diseases of South Dakota Identification Guide
Common grass disease identification guide.
Bacterial Ring Rot: Yet another devastating disease of potato
Ring rot is primarily a disease of stored tubers and seed potatoes, where it produces black or brown lines just below the surface of the potato.
Black Rot of Brassica Crops
Black rot is an uncommon, but devastating bacterial disease in South Dakota that can develop during extended periods of hot and wet weather, leading to rapid and widespread crop loss.
Mycotoxins: Should you be concerned?
Environmental stress caused by the weather or damaged crops increases the potential for mold and mycotoxin development. Learn some answers to common questions about mycotoxins and how to manage them.
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.
SDSU Extension programs help producers maintain healthy crops
August 26, 2025
Madalyn Shires puts on a lot of miles in the summer. As an assistant professor and SDSU Extension Plant Pathology Specialist, Shires traverses the state visiting research plots and educating crop producers on that research.