天てん狗ぐ巣す病びょう

noun

witches' broom; hexenbesen

A plant disease causing dense clusters of small branches, resembling a broom or bird's nest. The Japanese name references tengu (天狗), mythical creatures often depicted with long noses, possibly alluding to the distorted growth.

• この桜さくらの木きはてんぐ巣す病びょうにかかっている。

  This cherry tree is affected by witches' broom.

• 天てん狗ぐ巣す病びょうは菌きん類るいやファイトプラズマによって引ひき起おこされる。

  Witches' broom is caused by fungi or phytoplasmas.