How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development
and life cycle—Bacterial blight

Pseudomonas syringae survives on plant surfaces, is spread by splashing rain, and is favored by high moisture and low temperatures in spring. The pathogen is more damaging in low or sandy spots. Vigorous trees are better able to recover from the effects of bacterial canker and young trees, 2 to 8 years old, are most affected. The disease rarely occurs in first year of planting and is uncommon in nurseries.

Young tree affected by bacterial blight
Young tree affected by bacterial blight

 


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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