Corn Disease

Starburst pattern on Fusarium-infected corn kernels

Crop Diseases Reported by the UNL Plant and Pest Clinic

October 18, 2019
Root, crown and ear rots lead the list of corn and soybean diseases reported in samples submitted to the UNL Plant and Pest Diagnostic Lab from October 1 to October 17.

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Gibberella and fusarium stalk rots in corn

Stalk Quality Concerns Widespread in Areas of Nebraska

September 27, 2019
The effects of late planting and stressful growing conditions throughout much of the season are showing up now in poor stalk quality in corn. Growers are encouraged to scout fields and harvest those most at risk of lodging first. Here's why and what to look for.

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While mold sclerotia in a soybean stem

Crop Disease Reports from the UNL Diagnostic Clinic

September 13, 2019
Diseases of corn, soybean, sorghum and alfalfa diagnosed by the Plant and Pest Diagnostic Clinic in the last two weeks.

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Psysoderma brown spot

PP&DC Disease Reports

August 9, 2019
Corn and soybean diseases confirmed by the Plant, Pest and Diagnostic Clinic and reported by district.

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Southern rust on a corn leaf

Southern Rust of Corn Confirmed in Southeast Nebraska

July 25, 2019
Southern corn rust was confirmed on corn leaf samples from Fillmore and Nuckolls counties in southern Nebraska this week. The disease is currently at very low incidence in the fields where it was identified, but can lead to significant yield loss in susceptible hybrids.

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Corn seedling exhibiting disease symptoms

New CW Podcast on Corn Seedling Diseases

May 8, 2019
Michael Sindelar talks with Extension Plant Pathologist Tamra Jackson-Ziems about common corn seedling diseases, what to watch for in the field, and how to collect and submit quality samples for diagnosis.

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Map of bacterial leaf streak distribution in Nebraska

Corn Disease Update

January 9, 2019

The 2018 crop season got off to a slow start with cold, wet conditions delaying planting in much of the state. Some seedling diseases developed in early planted corn, but with ample heat units the corn caught up quickly and most of the crop finished ahead of schedule. High relative humidity and rainfall drove the development of several leaf diseases mid-season.

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Left photo showing corn stalk breakage from Gibberela stalk rot and right photo showing corn stalk damage from Fusarium stalk rot.
(L-R) Figure 1. Lodging and stalk breakage, as well as stalk discoloration, are symptoms of stalk rot diseases. (Photo by Terra Hartman) Figure 2. Stalk rot diseases commonly cause discoloration of the stalks and degradation of the white pith between vascular bundle strands. (Photo by Kyle Broderick)

Stalk Rot Diseases in Nebraska Corn Fields

September 13, 2018
Knowing the risk factors for stalk rot can help you evaluate those fields first and prioritize your harvest schedule accordingly. Submitting plant samples and determining which stalk rot is present can help you better prevent or manage it in future years.

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