Neocosmospora stem rot
scouted Sept. 4, 2026
- Scientific Name
- Neocosmospora vasinfecta
- Background
- A soybean field in Beaufort County was being scouted, and it was observed that 1% of the field was affected by yellowing in random areas of the field, red staining at the base of the stem, and red fruiting structures on roots. A sample was submitted to the PDIC for diagnosis.
- Conclusion
- The issue was confirmed to be Neocosmospora stem rot, caused by the fungus Neocosmospora vasinfecta. Symptoms of Neocosmospora root and stem rot can include interveinal chlorosis on the foliage, the presence of small red fungal structures around the crown, and discoloration of the pith. These signs can resemble other stem diseases, especially red crown rot. As interveinal chlorosis progresses, lower leaves may begin to drop earlier than expected. Both the roots and pith may also show varying degrees of discoloration
- Resources
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- No resources have been added.