E. communis may refer to:

  • Erysiphe communis, a synonym for Erysiphe cruciferarum, a plant pathogen that causes powdery mildew on brassica, especially on brussels sprouts
  • Erysiphe communis f. betae, a synonym for Erysiphe betae, a form of powdery mildew that affects the sugar beet

See also edit