Anthracnose
scouted July 25, 2023
- Scientific Name
- Colletotrichum destructivum
- Background
- Soybeans in Granville, variety Hutchinson, were scouted and observed 20% of field was affected by browning and yellowing, in a mottled pattern, leaf spot, stunting, widespread, and insect signs like boring and scars. The sample came from a second year of soybeans from an organic farmer with heavy deer and weed pressure.
- 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.
