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Tamra Jackson-Ziems - Extension Plant Pathologist

Example of stunting and yellowing in soybeans

September 28, 2021

Sample for Soybean Cyst Nematode This Fall

By Melissa Bartels - Former Extension Educator, Tamra Jackson-Ziems - Extension Plant Pathologist, Kyle Broderick - Extension Educator and Coordinator of the UNL Plant and Pest Diagnostic Clinic

Tar spot on corn

October 21, 2021

Tar Spot Disease of Corn Confirmed in Several Nebraska Counties

By Tamra Jackson-Ziems - Extension Plant Pathologist, Kyle Broderick - Extension Educator and Coordinator of the UNL Plant and Pest Diagnostic Clinic

SDS on soybeans

October 27, 2021

Seed Selection Can Help Manage Diseases Next Year

By Melissa Bartels - Former Extension Educator, Tamra Jackson-Ziems - Extension Plant Pathologist

Corn seedling

May 25, 2022

Conditions Favor Seedling Diseases in Early Planted Corn and Soybeans

By Dylan Mangel - Extension Plant Pathologist, Tamra Jackson-Ziems - Extension Plant Pathologist

Frogeye leaf spot

June 16, 2022

Fungicide Resistance and Management of Frogeye Leaf Spot of Soybean in Nebraska

By Asha Mane - Graduate Student, Dylan Mangel - Extension Plant Pathologist, Sydney Everhart - Associate Professor of Plant Pathology, Tamra Jackson-Ziems - Extension Plant Pathologist

Corn plant with large, swollen galls caused by common smut, forming along the stalk and leaf midrib with dark fungal spores beginning to emerge.

Published: July 7, 2022 | Updated: July 10, 2025

Disease Development Associated with Early-Season Hail Damage in Corn

By Amy Timmerman - Extension Educator, Kyle Broderick - Extension Educator and Coordinator of the UNL Plant and Pest Diagnostic Clinic, Tamra Jackson-Ziems - Extension Plant Pathologist

Closeup of black spots on corn leaf

July 12, 2024

Corn Diseases Developing in Some Fields — What To Watch

By Tamra Jackson-Ziems - Extension Plant Pathologist

Southern rust spots on corn leaf

July 25, 2024

Southern Rust Spreading in Eastern Nebraska

By Tamra Jackson-Ziems - Extension Plant Pathologist, Kyle Broderick - Extension Educator and Coordinator of the UNL Plant and Pest Diagnostic Clinic

Tar spot symptoms on corn leaf

August 15, 2024

Corn Disease Update: Fungicide Expectations for Disease Control

By Tamra Jackson-Ziems - Extension Plant Pathologist, Jenny Brhel - Extension Educator

Tar spot on corn leaf

August 29, 2024

Black Spots in Corn? Southern Rust, Tar Spot and More

By Tamra Jackson-Ziems - Extension Plant Pathologist, Kyle Broderick - Extension Educator and Coordinator of the UNL Plant and Pest Diagnostic Clinic