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Connie Tande

SDSU Extension Plant Diagnostician

605-688-5545

Berg Agricultural Hall 206
Box 2207D
Brookings, SD 57007

Connie supports the citizens of South Dakota in her role as the SDSU Extension Plant Diagnostician at the South Dakota State University campus in Brookings.

State & Regional Offices

SDSU Campus
Also by Connie Tande
Three blades of wheat grass exhibiting Alternaria symptoms.

Secondary Wheat Diseases: Alternaria Species Detected

In wheat observed this summer, the Alternaria species, a group of secondary fungal pathogens were identified in samples collected east of the Missouri river. This pathogen is infectious on its own and can cause Alternaria leaf spot disease.

Hands holding a corn leaf with a single tar spot lesion developing.

Online Reporting of Crop Diseases for Statewide Monitoring Efforts: How You Can Get Involved

Did you know that you can become involved in disease reporting and monitoring across the state? Thanks to a new tool from the Crop Protection Network, producers, crop consultants, and homeowners can report disease sightings on a variety of crops across the state.

Three wheat fields exhibiting wheat streak mosaic virus symptoms throughout.

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.