Soybean Disease

Frogeye leaf spot

Corn and Soybean Disease Update: Southern Rust, Frogeye Leaf Spot, and Phytophthora Root and Stem Rot

July 21, 2021
Following identification of southern rust, Phytophthora root and stem rot, and frogeye leaf spot in areas throughout the state, producers are encouraged to scout and be prepared to apply the appropriate fungicide treatments.

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Frogeye leaf spot on soybean plant
Figure 1: Frogeye leaf spot of soybean (FLS) disease caused by foliar pathogen, Cercospora sojina, (Photo courtesy: Tamra Jackson-Ziems/UNL)

Nebraska Soybean Foliar Fungicide Use Survey

March 17, 2021
Offered until May 31, the foliar fungicide use survey will help UNL researchers determine future Extension programming to best meet the needs of soybean growers and other agribusiness professionals.

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link to Managing Diseases Starts NOW with Seed Selection

Managing Diseases Starts NOW with Seed Selection

November 19, 2020
Now is the perfect time to think about how you can minimize diseases next growing season. Planting disease-resistant hybrids and varieties may be a more economical way to manage certain diseases, reduce disease severity and reduce dependence on pesticides.

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Blue fungal growth on soybean roots

Soybean Diseases Developing in Nebraska

September 4, 2020
Patches of yellowing or dying soybeans have been observed and are a cause of concern across many areas of Nebraska. Some of these areas are due to several diseases described here, but other conditions may impact the development of these spots.

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map showing southern rust in 45 Nebraska counties

Crop Diseases Spreading and Increasing

August 6, 2020
Southern rust continues to spread across eastern Nebraska. To date, southern rust has been reported in 45 Nebraska counties. Gray Leaf Spot, Bacterial Leaf Streak and Frogeye Leaf Spot are increasing as well.

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Lesions on Leaves

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

June 24, 2020
The results from field trials suggest an integrated disease management approach including tillage (when practical), crop rotation, resistant varieties, seed treatment, and timely application of mixed-mode of action fungicides provides the best control.

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Starburst pattern on Fusarium-infected corn kernels

Crop Diseases Reported by the UNL Plant and Pest Clinic

October 18, 2019
Root, crown and ear rots lead the list of corn and soybean diseases reported in samples submitted to the UNL Plant and Pest Diagnostic Lab from October 1 to October 17.

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Soybean leaves with bacterial blight

Late Season Soybean Diseases Widespread in Areas of Nebraska

September 13, 2019
Record rainfall during August and continued wet conditions into September are much to blame for the flush of diseases Nebraska’s soybean crop has been experiencing. Here are some of the most common diseases at this time and information on managing them.

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