Taphrina wiesneri

Taphrina wiesneri is a plant pathogen causing witch's broom, or plant gall formations, on cherry trees ("Prunus" & "Cerasus" spp). It is an important pest species of the ornamental cherry "Cerasus" X "yedoensis" in Japan.
Life cycle.
Komatsu et al. found that hyphae of "T. wiesneri" overwintered in symptomatic shoots of "Cerasus" × "yedoensis". This is in contrast with the overwintering of other "Taphrina" species such as "Taphrina deformans" that over winter on leaf and twig surfaces before initiating infection.