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? > Deciduous > Ninebark > Spots or blotches on leaves

Print Icon Email Icon Share Icon

Ninebark > Leaves > Spots or blotches on leaves

1 of 2
  • Image: 1
  • Image: 2
  • Image: 2

Powdery mildew
Erisyphe polygoni

  • White spots or blotches on leaves
  • In severe cases leaves and young shoots may be completely covered with white powdery fungal growth
  • Leaves may be stunted, curled or puckered
  • Red or purple blotches may occur on upper leaf surfaces
  • More information on powdery mildew...
2 of 2
  • Image: 1
  • Image: 2

Calligrapha beetle
Calligrapha spireaeae

  • Holes and chewed areas are found in leaves; feeding may be heavy
  • May be browning and drying of leaves
  • Adults are present in July and August
  • Adults are yellowish to reddish brown with ornate black and gold markings
  • More information on calligrapha beetle...

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