Phomopsis canker of douglas-fir

• French disease name: Chancre phomopsien du Douglas
• Pathogen name: Diaporthe lokoyae Funk
• Kingdom: Fungi
• Phylum: Ascomycota
• Class: Sordariomycetes
• Order: Diaporthales
• Family: Diaporthaceae

Distribution

• Western Canada

Damage, symptoms and biology

Sporadic outbreaks of this disease occur in plantations and nurseries. Most damage is minor, particularly on older trees. Severe top-kill and girdling of younger trees can result in poor growth form or mortality.

Other information

This disease is known as Phomopsis canker because the asexual stage is more common, and was described prior to the discovery of the sexual stage (Diaporthe).

Canadian Forest Service Publications

Phomopsis canker of douglas-fir

Information on host(s)

Main host(s)

• Rocky Mountain Douglas-fir

Secondary host(s)

• Dawn redwood
• Sitka spruce
• Western hemlock
• Western larch
• Western redcedar

Photos

Phomopsis canker on Douglas-fir

Al Funk