Frogeye Leaf Spot

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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soybean leaf showing signs of disease

Soybean Disease Update

March 19, 2020
Plants under stress due to environmental factors, such as extreme temperature and moisture are more susceptible to disease, and many were under stress due to the unique environmental conditions in 2019.

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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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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

Frogeye Leaf Spot in Soybeans in Eastern Nebraska

July 27, 2017
Frogeye leaf spot is occurring in Nebraska soybeans, particularly in the eastern third of the state. While some fields have minor levels, some have significant levels and a fungicide treatment may be needed.

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