ForesTree - A Guide to Tree Health

Pest and Disease Information

White Alder
  • Alnus rhombifolia - Susceptible to Aphids, Beetle Borers, Caterpillars and Spider Mites, Powdery Mildew. Additional and expanded information listed below.

  • For further tree information:
       SelecTree (154) | Silvics of North America
1 Record found
Disease or Pest NameDescription of Disease or Pest

Powdery Mildew
Microsphaera alni

Powdery mildew may occur on any green plant tissue or on flowers and fruits. Light colored mats of fungal growth often appear on infected leaves. Infected leaves may drop prematurely and leaves and shoot...