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Connie Strunk

SDSU Extension Plant Pathology Field Specialist

605-782-3290

SDSU Extension Sioux Falls Regional Center
4101 W 38th St Ste 103
Sioux Falls, SD 57106

Connie supports the citizens of South Dakota in her role as the SDSU Extension Plant Pathology Field Specialist based in Sioux Falls.

State & Regional Offices

Sioux Falls Regional Center

Also by Connie Strunk

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.

Coneflower with Aster yellows disease.

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.