Corn Disease

Harvest 2016 — When Corn Yields are Below Expectations

October 14, 2016
A review of 2016 growing conditions across Nebraska sheds light on a number of factors that may have contributed to reduced yield in individual fields. An understanding of these factors may be helpful when selecting seed for 2017.

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Aspergillus ear rot damage in corn
Aspergillus ear rot damage in corn

Ear and Stalk Rot Diseases Becoming More Common in Corn Fields

October 13, 2016
Ear rot diseases have been observed and stalk rot diseases are becoming increasingly common. It’s important to scout for stalk rot diseases now to determine which fields are at greatest risk of lodging and should be harvested first. Although it is unknown if ear rot diseases are widespread, it’s also important to scout for ear rot diseases to know how to better handle affected grain at harvest to prevent or minimize impacts on grain quality.

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The tops of corn plants that have Anthracnose stalk rot top dieback may break off prior to harvest, but are not always an indicator of stalk and crown rot lower on the plant.
The tops of corn plants that have Anthracnose stalk rot top dieback may break off prior to harvest, but are not always an indicator of stalk and crown rot lower on the plant.

Scouting for Stalk and Ear Rot Diseases

September 29, 2016
Stalk rot diseases are increasing in corn, causing top die-back in a number of fields, and ear rot diseases are developing in some fields. Scout fields now to help determine the need for any adjustments in your harvest management.

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Crown rot in corn
Crown rot in corn

Stalk Rot Diseases Including Anthracnose Top Dieback Developing in Some Fields

September 9, 2016
While most of the Nebraska corn crop looks good, there is early evidence of developing stalk and crown rot diseases, including Anthracnose top dieback. Producers are encouraged to scout their fields for disease and prioritize those fields for harvest where lodging may become an issue.

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PPDC Reporting Districts
PPDC Reporting Districts

Corn and Soybean Diseases Reported by UNL PPDC

September 9, 2016
The following diseases were reported in samples submitted to the UNL Plant and Pest Diagnostic Lab July 1 to Sept. 8.

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Bacterial Leaf Streak of Corn
Bacterial Leaf Streak of Corn

Bacterial Leaf Streak of Corn Confirmed in Nebraska, Other Corn Belt States

August 26, 2016
Bacterial leaf streak disease of corn, caused by Xanthomonas vasicola pv. vasculorum, has now been confirmed in multiple Corn Belt states. First identified in Nebraska, the bacterial disease has symptoms similar to other corn diseases, such as gray leaf spot, but is managed differently.

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Soybean/Corn Disease Update and Field Day Aug. 24 near Auburn

August 4, 2016

Nebraska Extension will be hosting a Soybean/Corn Disease Update and Field Day Wednesday August 24 in Nemaha County.

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Southern rust on a corn leaf
Southern rust on a corn leaf

Corn Disease Update: Southern Rust Confirmed in 10 Nebraska Counties

July 29, 2016
Southern rust has been confirmed in samples from 10 Nebraska counties — Adams, Butler, Clay, Fillmore, Lancaster, Nuckolls, Pierce, Polk, Thayer, and Valley. All were from fields with a low incidence of disease at the time. Growers should also be scouting for rust as well as gray leaf spot, common rust, and physoderma brown spot.

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