Phomopsis blight

scouted Aug. 23, 2021

Scientific Name
Diaporthe sp.
Background
Soybeans in Camden county, variety local seed 4798, were scouted and observed with 10% of the field affected by browning, spots, and stunted height
Conclusion
The cause was identified as seed decay and pod blight, also previously known as Phomopsis blight. It's not a common occurrence in North Carolina but persistent arm wet weather preceding and at crop maturity may increase damages caused by this disease. Evidence in mature plants can be seen on the stems and pods and it appears as black specks (pycnidia) in the stem and pod.
Resources
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