Plant and Pest Diagnostic Clinic

Stripe rust
Figure 1. Stripe rust in a grower’s wheat field in Deuel County on June 12. (Photo by Stephen Wegulo)

Update on Rust Diseases of Wheat – June 16, 2023

June 16, 2023
Stripe rust and leaf rust were observed in Nebraska fields this week; however, these diseases are not expected to cause significant yield reductions due to their late arrival in the wheat growing season.

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Wheat field

Wheat Disease Update for June 1, 2023

June 1, 2023
Tan spot was identified in several fields recently surveyed in the Panhandle, and though Fusarium head blight hasn't been observed in fields yet, parts of western Nebraska are currently at high risk for infection. 

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Wheat field in southeast Nebraska
Figure 1. A wheat field in Fillmore County in southeast Nebraska on May 17. There were no foliar diseases and emergence was uniform, but plants were much shorter than normal due to inadequate soil moisture. (Photo by Stephen Wegulo)

Wheat Disease Update for May 18, 2023

May 18, 2023
Though stripe rust has been sighted in southern Kansas wheat fields, there have been no signs of disease in Nebraska wheat as of yet.

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SCN nematodes

Sample for Soybean Cyst Nematode This Fall

September 29, 2022
Soil testing is the only way to accurately identify and monitor soybean cyst nematode, which may be the cause of unidentifiable yield loss during fall harvest.

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White mold on soybean

Soybean Disease Update: White Mold

August 11, 2022
Reports of white mold are being received from fields in Polk and Seward counties — while it is too late to manage infection this year, Nebraska producers have options for limiting white mold in next year's soybean crop.

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Stunted soybean plant

Phytophthora Root and Stem Rot is Appearing in Nebraska Soybean Fields

July 21, 2022
Disease development will be most rapid in low areas of the field that are poorly drained or where compacted soils are present, but can occur in well-drained fields during periods of excessive moisture.

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Frogeye leaf spot

Fungicide Resistance and Management of Frogeye Leaf Spot of Soybean in Nebraska

June 16, 2022
Frogeye leaf spot — which will likely begin appearing in Nebraska soybeans within the next few weeks — can cause significant yield loss, but there are effective management options available.

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Alfalfa field
Proper seed selection is the first line of defense for disease management of Phytophthora root rot and anthracnose, which can cause significant losses in a short amount of time.

Alfalfa Seed Selection to Help Manage Diseases

April 6, 2022
As you think about selecting alfalfa varieties to plant this year, be sure to consider varieties available with greater resistance to diseases like anthracnose and Phytophthora root rot.

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