Butternut Canker and Others

Canker Diseases - Hardwoods

Butternut Canker

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Cankers on butternut caused by Ophiognomonia (old name: Sirococcus) clavigignenti-juglandacerarum. The bark has been removed to show the cankered areas.

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Black Knot of Cherry

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Main stem of cherry with black knot, Apiosporina morbosa.

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Branches of cherry with black knot.

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Diamond Willow

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Cankers on willow stems

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Cross section through a canker on willow showing 4 perennial cankers. The white regions are the only areas where the sapwood is still alive.

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Golden Canker

Golden Canker

Canker caused by Aurantioporthe (old name: Cryptodiaporthe) corni on the main stem of alternate leaf dogwood. The canker has a bright golden coloration. The dark reddish bark is the natural color ofthe bark and the area not yet affected by the canker causing fungus.