ray blight
noun
mass noun
1- a fungal disease of chrysanthemums which causes collapse and rotting of the leading shoot菊科植物枯萎病。
1.1
- The fungus is Ascochyta chrysanthemi, subdivision Deuteromycotina (or Didymella chrysanthemi, subdivision Ascomycotina).该真菌是菊科壳二孢, 半知菌亚门（或菊科亚隔孢壳, 子囊菌亚门）。