Cypress canker

Page last updated: Wednesday, 10 November 2021 - 4:18pm

Please note: This content may be out of date and is currently under review.

Cypress canker or conifer die-back is a serious disease of exotic conifers that is common in Perth. It is through to be caused by pathogens, including Seiridium spp and was recognised in the United States in 1928 and more than 60 years ago in France.

The susceptibility of conifers varies.

Susceptible species

  • Cupressus macrocarpa (Monterey Cypress) (most susceptible when less than 10 years old)
  • Chaemaecyparis lawsoniana – various cultivars
  • x Cupressocyparis leylandii ‘Castlewellan Gold’
  • x Cupressocyparis leylandii ‘Leighton Green’
  • x Cupressocyparis leylandii ‘Naylors Blue’
  • Cupressus lusitanica
  • Cupressus sempervirens ‘Swanes Golden’ and other cultivars
  • Cupressus torulosa

Less susceptible

  • Cupressus arizonica (Arizona cypress)
  • Calocedrus decurrens
  • Thuja plicata (Western Red Cedar)
  • Thuja occidentalis
  • Juniperus virginiana