Corn Disease

Corn Disease Updates Aug. 4-5; Samples Welcomed

July 28, 2016

Corn Disease Updates, hosted by Nebraska Extension and sponsored by the Nebraska Corn Board, will be held at three more sites in the next two weeks.

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Corn nematode damage
Figure 1a. Severe sting nematode injury to corn. When sampling severely affected areas, collect samples from the edges of damaged areas in the field. That's where you'll find the most nematodes. (Photos by Tamra Jackson-Ziems)

Corn Nematodes: Scout Sandy Soils Now, Other Soils Any Time

June 7, 2016

This year nematode damage in some Nebraska fields may be masked by the ample rainfall we’ve received, but rest assured, these plant parasitic nematodes are still there in almost every field. Their impact ranges from no obvious sign to severe crop injury and tremendous yield loss.

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Inconsistent corn stand indicating possible seedling disease
Figure 1. Scout corn stands for intermittent gaps indicating missing or lost plants as well as diseased or dead plants.

Seedling Diseases Continue to Develop in Nebraska Corn

June 2, 2016
Following several weeks of rainy conditions, seedling diseases are becoming more apparent in corn. See what symptoms to look for when scouting fields.

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Corn seedling disease
Figure 1. Stunting, discoloration, damping off, and root rot are all common symptoms of seedling diseases, like the plant on the left compared to the healthy plant (right).

Seedling Diseases Developing in Corn

May 20, 2016
With cool wet conditions favorable for corn seedling disease development, growers are urged to scout for inconsistent stands and disease pressure. This week seedling diseases were documented in 10% of surveyed fields in Dodge County in eastern Nebraska, mostly in corn-after-corn fields in river valleys. Be sure to monitor seedling emergence and stand establishment across the state during the coming weeks so that if problems occur they can be detected as early as possible.

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Corn seedling damping off
Corn seedling with post-emergence damping off.

Wet Conditions Favorable for Seedling Diseases in Early Planted Corn

April 28, 2016
Wet field conditions and cool soil temperatures across Nebraska may put early planted corn at added risk for seedling diseases. Be sure to monitor seedling emergence and stand establishment in the coming weeks so that if problems occur they can be detected as early as possible.

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