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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Japanese tree lilac > Dense clusters of weak shoots

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

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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...

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