Corn Disease

Southern rust on a corn leaf
Figure 1. Southern rust has been confirmed in corn in eight eastern Nebraska counties and growers are urged to scout from now through August, as weather conditions are quite favorable for its development.

Southern Rust Confirmed in Corn in 8 Eastern Nebraska Counties July 19, 2017

Southern rust has been confirmed in corn in 8 eastern Nebraska counties and growers are urged to scout vigilantly to schedule optimal timing of treatment, if needed. Most systemic fungicides can provide protection of leaves from future infections for 21-28 days.

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common corn smut on an ear

Several Corn Diseases Developing Across Nebraska July 13, 2017

Several diseases, as well as other problems that look like diseases, have been confirmed in corn samples from around the state. These diseases can be difficult to differentiate from each other and from abiotic causes. This story offers photos and brief descriptions to aid your diagnosis before making treatment decisions.

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Bacterial leaf streak lesions may vary in color and length, but will be between veins and often have wavy margins. (UNL Photos)

Detection and Characterization of the Causal Agent for Bacterial Leaf Streak in Corn July 7, 2017

When a new crop disease strikes, researchers dig in to identify its characteristics. Noting how it's similar to and different from other diseases are part of defining it so plant pathologists can better confirm its presence in the field, monitor its spread, and develop appropriate management practices. Here's the story of how plant pathologists identified bacterial leaf streak.

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Jeff Wilkerson, host of Market Journal

Market Journal June 16: Grain Markets, Bacterial Leaf Streak, Forecast June 16, 2017

On this week's Market Journal with host Jeff Wilkerson view these segments:

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Bacterial leaf streak lesions of corn

Bacterial Leaf Streak Confirmed on V4 Corn in Nebraska June 15, 2017

Bacterial leaf streak disease has been confirmed on a sample submitted to the UNL Plant and Pest Diagnostic Clinic from Adams County. The corn was at the V4 growth stage and represents the earliest that the disease has been confirmed in a field.

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Plant & Pest Diagnostic Clinic Report (June 14) June 15, 2017

The following diseases were reported in samples submitted to the UNL Plant and Pest Diagnostic Lab June 1 to June 14.

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Corn with wrapped leaves in response to hail
Figure 1. Corn plant exhibiting abnormal growth (wrapped or tied leaves) after being damaged by hail. (Photos by Justin McMechan)

Evaluating Early-Season Hail Damage in Corn May 25, 2017

Factors to consider when assessing early-season hail damage in corn. Growers urged to wait 7-10 days after hail to make full assessment.

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Corn seedling damage
Figure 1. Seedling with post-emergence damping off (left) next to a healthy seedling.

Recent Cold, Wet Conditions are Favorable for Seedling Diseases in Early Planted Corn May 5, 2017

Recent cold, wet field conditions and fluctuations in soil temperatures have put early planted corn at risk for seedling disease development. Cold soil temperatures and episodes of recent rainfall (and snow) are especially favorable for some of the most common and damaging seedling diseases favored by cold wet conditions.

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