Taphrina wiesneri

Taphrina wiesneri is a plant pathogen causing witch's broom, or plant gall formations, on cherry trees (Prunus & Cerasus sp). It is an important pest species of the ornamental cherry Cerasus X yedoensis in Japan. Komatsu et al found that hyphae of T. wiesneri overwintered in symptomatic shoots of Cerasus X 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.