Two examples of Cankers. Photo courtesy of illinois.edu
About Cankers
Cankers are lesions in the trunk or branch often caused by mechanical wounding and/or fungal and bacterial pathogens. Canker causing pathogens are often host specific, i.e. sudden oak death in oaks. Fungal cankers are often the result of a fungal spore entering a wound or crack in the bark and reproducing. Cankers can appear as areas of cracked or missing bark, discolored bark, sunken bark or calloused bark. Cankers can sometimes exude fluids, have strong odors or host obvious fungal growths. Cankers can girdle branches and/or the trunk, cause structural weaknesses and cause death of the plant.
Host Trees for Cankers
Red and White Oaks, Maples, Elms, Hickories, Ash, and Cherry.
Treatments for Cankers
Trees with Cankers can be treated with: PHOSPHO-jet.
Learn More About Common Tree Pests & Treatments
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