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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Hackberry > Dense clusters of twigs

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Hackberry > Branches/Trunk > Dense clusters of twigs

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  • Image: Witches' broom gall 1
  • Image: Witches' broom gall 2
  • Image: Witches' broom gall 3

Witches' broom gall
Podosphaera phytoptophila and Eriophyes celtis

  • Proliferation of small branches and twigs bunched together at the ends of branches
  • Clusters of twigs develop from a single point on the branch
  • Symptoms are caused by the interaction of a disease and mite
  • Damage is most noticeable after leaves have fallen
  • More information on Witches' broom gall
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  • Image: Deicing salt injury 1
  • Image: Deicing salt injury 2

Deicing salt injury

  • Soil salt damage causes leaf edges or margins to appear burnt or scorched progressing toward the mid-vein
  • Salt spray causes branch growth to become tuft-like (a.k.a. witches' broom)
  • Run-off salt kills roots which results in die-back of most branches
  • Affected trees leaf out later than other non-infected trees
  • Damage most noticeable in spring and into the summer growing season
  • More information on Deicing salts

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