Bacterial wilt

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Causal organism: Ralstonia solanacearum E. F. Sm.


Other names: Blast; Pseudomonas solanacearum (prior to 1992), Burkholdaria solanacearum (1992-1995)





This disease has only been recorded in restricted areas in China.


It is an UNLIKELY diagnosis in other locations.


However, if it does spread, it is important that authorities are informed as soon as possible.


Any suspected occurrence should be reported to plant protection authorities.

Diagnostic summary

  • What you see on plants


    - on sprouts or young plants, the base of the stem becomes watersoaked then yellowish to brown.

- vascular tissue in the stem may become streaked with brown.


- plants may appear wilty or grow poorly with older leaves turning yellow.


- storage roots may have yellowish brown longitudinal streaks, or greyish watery lesions.

  • Most severe in warm humid weather, on poorly-drained or mildly acidic soils.


Economic importance

Geographical distribution



Biology and ecology

Host range





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