Fusarium wilt
scouted Sept. 5, 2024
- Scientific Name
- Fusarium oxysporum
- Background
- Soybeans in Catawba County, variety AG56XF0, were scouted, and it was observed that 15% of the field was affected by general yellowing, root rot, stem rot, stunting, and wilting in spots. The spots are about 20' wide all around the field that have pale, stunted plants. Root systems in these spots have a sort of a knot in them and are very small and weak. Grower reports that a hot period wilted the plants in poor spots. The agent was also able to rub off some of the root surface with a finger. Low area and wet site. This is in a newly acquired river bottom. The soil is river loam and has some very sandy spots on the surface. Field and crop conditions are highly variable and have been in soybean rotation 3+ years. A sample was submitted to the PDIC for diagnosis.
- Conclusion
- This issue was caused by Fusarium oxysporum. It often occurs in irregular patches in the field. Symptoms are first observed in hot and dry conditions, and they include interveinal chlorosis in the leaves, premature defoliation ,and wilting and reddish/brown vascular discoloration in the stem. This disease is usually a major limiting factor in soybean production, but it's more severe in northern states. It usually doesn't represent a major threat to soybeans in North Carolina.
- Resources
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- No resources have been added.
