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
tree affected by bacterial blight