Anthracnose
scouted Sept. 16, 2021
- Scientific Name
- Colletotrichum destructivum
- Background
- Soybeans in Pasquotank county, variety Pioneer P46A86X, were scouted and observed 5% of the field was affected by blight, marginal yellowing, and leaf spot in patches in the field, shady site. Although lower leaves are turning yellow, individual leaves in top of canopy are developing water soaked lesion until it overtakes the entire leaf, dries up, and dies. Seems to be most prevalent along hedge row that borders the field. Roots and lower stems are white (taproot) or light green (stem) when cut open.
- 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.
- Resources
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- No resources have been added.
