Bacterial soft rot of chrysanthemum

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Bacterial soft rot of chrysanthemum
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Scientific Classification
Kingdom: Bacteria
Phylum: Proteobacteria
Class: Gamma Proteobacteria
Order: Enterobacteriales
Family: Enterobacteriaceae
Genus: Erwinia
Species: Erwinia chrysanthemi
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Areas where E. chrysanthemi infections have been confirmed (blue) and have been confirmed, but not established (light blue)
Bacterial soft rot

Bacterial soft rot of chrysanthemum
Dickeya chrysanthemi
Erwinia carotovora var. chrysanthemi
Pectobacterium carotovorum var. chrysanthemi
Pectobacterium chrysanthemi
Pectobacterium parthenii var. chrysanthemi
Pectobacterium parthenii

Pectobacterium parthenii var. dianthicola

'Bacterial soft rot of chrysanthemum, caused by E. chrysanthemi, is a soft rot pathogen degrading succulent fleshy plant organs such as roots, tubers, stem cuttings and thick leaves. It is also a vascular wilt pathogen, colonizing the xylem and becoming systemic within the plant. This latter aspect is the most alarming when vegetative propagation is involved. The pathogen can remain latent in stock plants and can thus be spread in cuttings from them. Tubers are an important source of the disease for potatoes.[1]

Symptoms[edit | edit source]

Since soft rots and particularly wilts are not symptoms specific to E. chrysanthemi, the identity of the causal bacterium must be checked.[1]

Control[edit | edit source]

Control varies with the crop attacked. It entails strict attention to sanitation and plant hygiene in the nursery or glasshouse, and usually a rigidly controlled propagation programme to produce disease-free plants.[1]

References[edit | edit source]