Content by Connie Strunk

Wheat plants in a field showing viral symptomology of Wheat Streak Mosaic Virus.

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 leaves with yellow and brown streaking on the tops and edges

Grass Diseases of South Dakota Identification Guide

Common grass disease identification guide.

A yellowish-orange beetle with black squares along the back resting on a green plant.

Bean Leaf Beetles in South Dakota

This fact sheet provides an overview of the biology of the Bean Leaf Beetle and management options for South Dakota.

SDSU Extension offers virtual suicide prevention training for farm families

November 05, 2025

South Dakota State University Extension is offering virtual suicide prevention training for farm families called Questions, Persuade, Refer (QPR).

Dried corn growing in a field with visible damage and molding.

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.

SDSU Extension to host corn disease scouting workshop

September 23, 2025

South Dakota State University Extension will host a scouting session for corn diseases confirmed in the state this season.

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.

Aster Yellows Phytoplasma

Aster yellows is a phytoplasmal disease carried and introduced by aster leafhopper. It is known to infect over 80 different plant families, as the aster leafhopper has extremely broad feeding habits.

Corn leaf samples with Southern Rust and Tar Spot.

Corn Diseases in South Dakota Update

Several South Dakota counties have confirmed positive cases of Southern Rust and Tar Spot this growing season. See our latest recommendations for dealing with these diseases before they become a problem.

Green wheat leaves with yellow streaks throughout.

Wheat Streak Mosaic Virus Complex: Breaking the Green Bridge

As wheat harvest proceeds, it won’t be long until winter wheat planting is underway in South Dakota. To effectively reduce wheat streak mosaic virus, it is important to manage the green bridge effect to slow spread of disease in newly emerging wheat fields.