Kyle Broderick - Extension Educator and Coordinator of the UNL Plant and Pest Diagnostic Clinic

Loren Giesler

faculty
Work
PLSH 448 Lincoln NE 68583-0722
US
Work 402-472-2559 On campus, dial 2-2559
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.

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Example of stunting and yellowing in soybeans
Figure 1. SCN does not often cause visible symptoms in soybeans. When population densities of SCN are high, you may notice stunting and yellowing (pictured here) in patches in some soybean fields.

Sample for Soybean Cyst Nematode This Fall

September 28, 2021
It is a busy time of year as harvest begins across the state, but this is the perfect time to collect soil samples for soybean cyst nematode while waiting in the field in a grain cart or truck as the combine fills.

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SDS foliar symptoms

Triazole Phytotoxicity in Soybeans

August 26, 2021
Soybeans across Nebraska are currently presenting symptoms common with Sudden Death Syndrome and Brown Stem Rot; however, recent samples indicate many of the affected fields are experiencing phytotoxicity due to the application of a triazole (DMI) fungicide.

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Crown rot in stem

Crown and Stalk Rot Sampling Tips

August 26, 2021
As you continue to scout fields late in the season, it is important to collect the right kind of sample to ensure proper diagnosis.

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Rhizoctonia root rot of soybeans
Photo 1. Rhizoctonia root rot of soybeans. Lesions near the soil line tend to be sunken and dry.

Disease Reports from the UNL Diagnostic Clinic — June 30

July 1, 2021
Several diseases were reported in samples submitted to the UNL Plant and Pest Diagnostic Clinic from June 15 through June 30, 2021.

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Stripe rust in a field
Figure 1. Stripe rust in a state variety trial at the Eastern Nebraska Research and Extension Center (ENREC) near Mead, Sauders County, on June 2.

Wheat Disease Update: Stripe Rust, Leaf Rust, and Fusarium Head Blight

June 4, 2021
Leaf rust
Figure 2. Leaf rust in a research plot at Havelock Farm in Lincoln, Lancaster County, on June 1.

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Flooded wheat field
Figure 1. A flooded section of a grower’s wheat field in excellent condition in Deuel County on May 25.

Wheat Disease Update

May 27, 2021
Stripe rust and leaf rust confirmed in new counties; Fusarium head blight risk reported as moderate to high in southern Nebraska.

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Stripe rust
Figure 1: Stripe rust (Photo by Nathan Mueller)

Track Stripe and Leaf Rust in Winter Wheat Across Nebraska

April 29, 2021
Producers are encouraged to report wheat stripe and leaf rust sightings again this year to help Nebraska Extension continue monitoring movement of these crop diseases throughout the state.

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