page_title: Taphrina pruni
section_title: Hosts
hierarchical_section_title: Taphrina pruni / Hosts
caption_attribution_description: English: Deformed Blackthorn twig infected with Taphrina pruni, Eglinton, Ayrshire, Scotland.
context_page_description: Taphrina pruni is a fungal plant pathogen of blackthorn that causes the pocket or bladder plum gall, a chemically induced distortion of the fruit, producing swollen on one side, otherwise deformed and flattened fruit gall without a stone. The twigs on infected plants may also be deformed with small strap-shaped leaves.
context_section_description: Taphrina pruni produces a distinctive tongue-like growth, similar to other closely related species such as Taphrina alni on alder (Alnus glutinosa) and Taphrina padi on bird cherry Prunus padus. The growth is the distorted fruit and not a fungus in its entirety.
  Tephrina pruni is also found on bird cherry (Prunus padus), almond (Prunus amygdalus), peach and nectarine (Prunus persica). The Mirabelle or Greengage varieties of Prunus domestica may be more resistant.
caption: Deformed blackthorn twig.
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