Dahlias
Q.

dahlia tubers

Zone 97068 | [email protected] added on November 29, 2016 | Answered

I dug up my dahlia tubers and the tubers have bumps on them. I have never seen these before on my tubers. Is this a fungus or disease? What should I do?

A.
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Alisma
Certified GKH Gardening Expert
Answered on November 29, 2016

I am not sure what these bumps are. They may be normal swellings called lenticels that can appear in wet weather. Or, they could be caused by nematodes:
https://smartsite.ucdavis.edu/access/content/user/00002950/courses/204NEM/IGALLS.htm

I don't think it is any more serious disease, like crown gall.

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