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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

Two broccoli plants exhibiting early black rot symptoms.

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.

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.

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.