Soybean Disease

Charcoal rot in soybean

Charcoal Rot: A Hidden Threat to Soybean Yield

July 27, 2017
The persistent hot weather this growing season may be conducive to the development of charcoal rot disease in soybean and scouting is urged. Although charcoal rot is most severe in hot dry conditions, it can also cause losses when ample moisture is present, making it a hidden threat to yield.

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Wilted, stunted phytophthora
Figure 1. Wilted and stunted soybean plant due to phytophthora in an otherwise healthy field. (Photo taken in Hall County by Sarah Schlund)

Phytophthora Root and Stem Rot Developing in Soybeans

July 27, 2017
As conditions heated up the last two weeks, the fungus causing phytophthora root and stem rot became active in irrigated fields and those fields that received significant rain over the past couple weeks. Growers are encouraged to scout for this disease and, if found, manage through seed selection and treatment for the next crop.

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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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Plant & Pest Diagnostic Clinic Report (June 14)

June 15, 2017

The following diseases were reported in samples submitted to the UNL Plant and Pest Diagnostic Lab June 1 to June 14.

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Phytophthora root and stem rot

Conditions Favor Early Season Soybean Diseases Again This Year

June 6, 2017
Cool, wet conditions in May may be contributing to soybean seedling injury from disease. Scouting is recommended to identify diseases and differentiate injury from that caused by herbicides when determining potential stand loss.

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Soybean fungicide calculator

Research in 4 North Central States Shows Limited Response with Fungicide in R3 Soybeans

February 3, 2017

In a multi-year summary of soybean studies with fungicide and insecticide applications in the north central United States, university researchers combined trial data to estimate overall profitability of foliar applications at the R3 growth stage (beginning pod development).

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Soybean cyst nematode cysts on soybean
Soybean cyst nematode cysts on soybean

Test for SCN This Fall & Select Seed Accordingly

October 31, 2016
If you noticed some areas of your soybean fields that didn't yield as well as expected, this fall would be a good time to soil test for soybean cyst nematode. In University of Nebraska research of SCN-infested fields, switching to an SCN-resistant variety increased yields as much as 6 bu/ac.

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PPDC Reporting Districts
PPDC Reporting Districts

Corn and Soybean Diseases Reported by UNL PPDC

September 9, 2016
The following diseases were reported in samples submitted to the UNL Plant and Pest Diagnostic Lab July 1 to Sept. 8.

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