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| Grovesiella canker
True Fir
Disease
Annosus root rot
Armillaria root rot
Current-season needle necrosis
Flowers
Grovesiella canker
Interior needle blight
Needle casts
Phytophthora root rot
Rust (Pucciniastrum)
Rust (Uredinopsis)
Insect
Balsam twig aphid
Balsam woolly adelgid
Coneworms
Giant conifer aphids
Spruce budworm
Spruce spider mite
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Caption: Fir Grovesiella canker
Photo by: R.S. Byther
True Fir : Grovesiella canker
(revision date: 4/23/2014)
Use Integrated Pest Management (IPM) for successful plant problem management.
Biology
Grovesiella canker is a fungal disease found mainly on the lower branches and stems of young trees or the lower branches of older trees. Sunken, dead areas develop on one-year-old and older branches or stems. The affected branch is swollen above the canker and twigs may die back. Young trees may die if a canker girdles the stem. The cankers continue to expand indefinitely. Cankers are not found on the crown or roots of affected trees. Grovesiella canker can be a concern on Christmas tree plantations. White fir and Shasta fir are more susceptible than Noble fir or grand fir.
Management Options
Non-Chemical Management
Prune and destroy infected branches on landscape trees. Make pruning cuts well below diseased wood.
Select non-chemical management options as your first choice!
Chemical Management
IMPORTANT:
Visit Home and Garden Fact Sheets for more information on using pesticides
None recommended
Images
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Caption: Fir Grovesiella canker
Photo by: R.S. Byther
Caption: Fir Grovesiella canker
Photo by: B.M. Johnson