How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Deep bark canker

The pathogen that causes deep bark canker survives the winter in cankers or dried exudate on the tree surface. The bacteria become active in late spring and begin to ooze from the cankers together with plant sap. It enters the tree most often through wounds caused by equipment. High temperature favors the development of the disease.

Black streaks and pits of deep bark canker
Black streaks and pits of deep bark canker


Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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