Anthracnose

scouted Sept. 12, 2022

Scientific Name
Colletotrichum destructivum
Background
Soybeans in Iredell county were scouted and observed 10% of the field was affected by browning, leaf spots and wilting on the upper leaves in patches in the field. There were fungal structures on leaves. The previous crop is wheat.
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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