Skip to Left navigation Skip to Main content Skip to Footer

University of Minnesota Extension

Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Willow > Dots, spots or blotches on leaves

Print Icon Email Icon Share Icon

Willow > Leaves > Dots, spots or blotches on leaves

1 of 2
  • Willow blight 1
  • Willow blight 2

Willow blight
Ventura saliciperda and Glomerella miyabeana

  • Young leaves turn black, shrivel and fall off as buds open in spring
  • Shoots turn black, wilt, curl over and die
  • Small, black, sunken cankers form on twigs causing twig dieback and shoot blight
  • Infection from V. saliciperda limited to new shoots; G. miyabeana may infect older twigs
  • Common in cool, wet weather
  • More information on Willow blight
2 of 2
  • Willow lace bug 1
  • Willow lace bug 2
  • Willow lace bug 3

Willow lace bug
Corythucha elegans

  • White or yellow speckled or pinprick discolorations on upper leaf
  • Leaves can look bleached when infestations are severe
  • Black, shiny spots and shed skins on underside of leaves
  • Lacebugs are up to ¼ inch long; light colored bodies with dark colored spots; intricate, lacy wings
  • More information on Willow lace bug

Don't see what you're looking for?