Skip to Main navigation Skip to Left navigation Skip to Main content Skip to Footer

University of Minnesota Extension
www.extension.umn.edu
612-624-1222

Extension > Garden > Diagnose a problem > What's wrong with my plant? > Evergreen Trees and Shrubs > Arborvitae > Powdery black coating on foliage

Print Icon Email Icon Share Icon

Arborvitae > Foliage > Powdery black coating on foliage

1 of 1
  • Image: Fire Blight 1
  • Image: Fire Blight 2
  • Image: Fire Blight 3

Sooty mold

  • Black, brown or gray powdery patches or coating on foliage and twigs
  • Forms on honeydew (sticky, shiny secretions) produced by aphids or scale insects
  • Can spread to other plants or plant parts not attacked by these insects
  • More information on Sooty mold...

Don't see what you're looking for?

  • © Regents of the University of Minnesota. All rights reserved.
  • The University of Minnesota is an equal opportunity educator and employer. Privacy