Anthracnose

scouted Sept. 21, 2022

Scientific Name
Colletotrichum destructivum
Background
Soybeans in Edgecombe county, variety NK 69Q4X7, were scouted and observed 2% of the field was affected by dieback, browning and yellowing between the veins, mold/mycelium, stem rot, and appears in patches. Previous crops were peanuts and sweet corn and some areas of the field.
Conclusion
The cause of disease was identified as Anthracnose, caused by Colletotrichum. While usually a disease that shows in the stems and the petioles, it can also cause leaf curling and reddening of the veins. Warm, wet weather favors infection and disease development. Crop rotation and tillage can reduce inoculum, while foliar fungicides will reduce disease, but it's usually not profitable.
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