Soybean Disease

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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While mold sclerotia in a soybean stem

Crop Disease Reports from the UNL Diagnostic Clinic

September 13, 2019
Diseases of corn, soybean, sorghum and alfalfa diagnosed by the Plant and Pest Diagnostic Clinic in the last two weeks.

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Frogeye leaf spot
Figure 1. Frogeye leaf spot on soybean

Frogeye Leaf Spot in Northeast Nebraska

August 19, 2019
Moderate to severe frogeye leaf spot is being reported on soybean in northeast Nebraska. Pathogen resistance to QoI fungicide is suspected in two fields. If you suspect resistance, contact the author for possible testing.

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Frogeye leaf spot in soybean

Extension Crop and Pest Reports (August 12-16)

August 16, 2019
Twitter reports from Nebraska Extension of what to watch for in the field.

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