Charcoal rot
scouted Sept. 15, 2026
- Scientific Name
- Macrophomina phaseolina
- Background
- A tobacco field in Greene County was being scouted, and it was observed that the field was affected by insect chewing and widespread browning and yellowing. This field is a dry site. A sample was submitted to the PDIC for diagnosis.
- Conclusion
- The issue was identified as charcoal rot of tobacco. Charcoal rot is cause by Macrophomina phaseolina, a soil-borne pathigen with a wide host-range. The most common sympto in charocl rot is small black speckling in th elower part of the stem. Other symptoms may include wilting, stem rot, damping-off and cankers. Symtoms severity increases whne temperatures are above 86°F. and in drought conditions.
- Resources
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- No resources have been added.