This article is a list of diseases of dahlia (Dahlia sp.).
Erysiphe cichoracearum Erysiphe communis Erysiphe polygoni
Sclerotium rolfsii Athelia rolfsii [teleomorph]
Rhizoctonia solani Thanatephorus cucumeris [teleomorph]
Fusarium oxysporum Verticillium albo-atrum