Soybean stem canker
scouted Aug. 3, 2026
- Scientific Name
- Diaporthe sp.
- Background
- A soybean field, variety NK58, in Randolph County was being scouted, and it was observed that 1% of the field was affected by canker, damping off, root, rot, and stem rot in patches. The site is wet. A sample was submitted to the PDIC for diagnosis.
- Conclusion
- This issue was identified as Soybean Stem Canker. Symptomology associated with soybean stem canker can include reddish-brown lesions on the main stem at the base of a lower stem, small black spots that appear on dead tissue, and dead leaves that remain attached to the stem. You can best manage this disease with resistant varieties and crop rotation to non-host crops such as corn or wheat.
- Resources
