Pacific Northwest Plant Disease Management Handbook

Dahlia-Bacterial Soft Rot

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Latest revision: 
March 2024
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Tubers have become discolored, soft and mushy.
Melodie Putnam, 2010.

Tuber that was in an intermediate stage of decay where a Pseudomonas sp. was recovered.

OSU Plant Clinic, 2023.

Advanced decay of tuber.

OSU Plant Clinic, 2023.

See:

Iris, Rhizomatous (Iris spp.) - Bacterial Soft Rot

Pscheidt, J.W., and Ocamb, C.M. (Senior Eds.). 2024 Pacific Northwest Plant Disease Management Handbook.
© Oregon State University.

Use pesticides safely!

  • Wear protective clothing and safety devices as recommended on the label. Bathe or shower after each use.
  • Read the pesticide label—even if you’ve used the pesticide before. Follow closely the instructions on the label (and any other directions you have).
  • Be cautious when you apply pesticides. Know your legal responsibility as a pesticide applicator. You may be liable for injury or damage resulting from pesticide use.

Trade-name products and services are mentioned as illustrations only. This does not mean that the participating Extension Services endorse these products and services or that they intend to discriminate against products and services not mentioned.

H - Home garden packaging commonly available.     O - Acceptable in organic production.