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photo collage of tar spot map behind corn leaf and text about what's included in article

Published: June 20, 2025

Early Tar Spot Detected in Nebraska Corn; Irrigation Shown to Elevate Disease Risk

Talon Mues - Extension Educator, Saleh Taghvaeian - Biological Systems Engineering Associate Professor, Dylan Mangel - Extension Plant Pathologist, Tamra Jackson-Ziems - Extension Plant Pathologist

Tar spot on corn leaf

Published: August 29, 2024

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

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

Published: August 15, 2024

Corn Disease Update: Fungicide Expectations for Disease Control

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

Extension educator county map

Published: July 26, 2024

Extension Crop and Pest Reports (July 22-26)

Published: July 12, 2024

This Week on N Field: Tar Spot 2024

Closeup of black spots on corn leaf

Published: July 12, 2024

Corn Diseases Developing in Some Fields — What To Watch

Tamra Jackson-Ziems - Extension Plant Pathologist

N Field banner

Published: July 6, 2023

This Week on N Field: Tar Spot in Corn

Tar spot on corn

Published: October 13, 2022

Tar Spot Disease of Corn Spreading to More Nebraska Counties

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

Tar spot on corn

Published: October 21, 2021

Tar Spot Disease of Corn Confirmed in Several Nebraska Counties

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

CropWatch Graphic

Published: March 19, 2020

What’s New in Plant Pathology

Tamra Jackson-Ziems - Extension Plant Pathologist