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 > Japanese tree lilac > Dense clusters of weak shoots

Print Icon Email Icon Share Icon

Japanese tree lilac > Trunk/branches > Dense clusters of weak shoots

1 of 1
  • Image: Eastern Tent Caterpillar 1
  • Image: Eastern Tent Caterpillar 2
  • Image: Eastern Tent Caterpillar 3

Lilac witches' broom
Candidatus Phytoplasma fraxini

  • Leaves in the entire canopy are pale green to yellow, leaf edges may turn brown
  • Witches' brooms, a cluster of numerous small weak shoots arising from one point, occur on branch ends and clustered along the base of the tree
  • Leaves on witches' broom are small, pale green to yellow and distorted
  • Individual branches die, the tree declines and eventually dies
  • More information on Lilac witches' broom

Don't see what you're looking for?