Fusarium wilt

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Causal organism: Fusarium oxysporum f.sp. batatas (Wollenw.) Snyder and Hansen


Symptoms of Fusarium wilt (W. Martin).


Stem symptom of  Fusarium wilt disease (T. Ames).

Diagnostic summary

  • What you see on plants

- most obvious symptom is an interveinal yellowing of leaves followed by wilting. The older leaves dry out and can drop from the plant or stay hanging from the stems at any stage of development. Yellowing of leaves is sometimes one sided.


- splitting or cracking of stem


- browning or blackening of stem inside (vascular tissues) which may extend to the storage roots


- premature flowering


- stunting


- may cause fibrous root necrosis


Economic importance

Geographical distribution



Biology and ecology

Host range





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Fusarium surface and root rots