Anthracnose

scouted Sept. 7, 2022

Scientific Name
Colletotrichum destructivum
Background
Soybeans in Camden county, variety AG 59XF0, were scouted and it was observed that 70% of the field was affected by leaf spot and speckling/stippling. These symptoms were widespread throughout 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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