Extension educator county map

Extension Crop and Pest Reports (July 22-26)

July 26, 2024
Extension educators share their observations in fields across Nebraska this week.

Read more

Closeup of black spots on corn leaf
Figure 1. Tar spot black stromata develop on the upper leaf first then become visible underneath too. Over time, the spots increase in size and elongate. (Photos by Tamra Jackson-Ziems)

Corn Diseases Developing in Some Fields — What To Watch

July 12, 2024
Tar spot has been confirmed in several eastern Nebraska counties in recent weeks, and distribution of the fungus is expected to continue expansion this year.

Read more

N Field logo

This Week on N Field: Tar Spot 2024

July 12, 2024
Nebraska producers should be on the lookout for tar spot — watch this episode of N Field for quick tips on scouting and identification.

Read more

N Field banner

This Week on N Field: Tar Spot in Corn

July 6, 2023
Learn the techniques for conducting a thorough examination when scouting for tar spot in your fields.

Read more

Tar spot on corn
More severe tar spot pictured in western Iowa in October 2019.

Tar Spot Disease of Corn Confirmed in Several Nebraska Counties

October 21, 2021
Tar spot was confirmed in seven eastern Nebraska counties during recent weeks, and there are likely additional corn fields in other counties where the disease can be found.

Read more

What’s New in Plant Pathology

March 19, 2020
Fungicide resistance was confirmed in soybean samples from 10 Nebraska counties infected with the frogeye leaf spot pathogen. Tar spot, a fungal disease of corn, has been confirmed in numerous western Iowa counties and is likely to reach Nebraska in 2020.

Read more