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Bacterial Leaf Spot and Blast

Pseudomonas syringae

8 host plants

Last updated

Data Coverage 3 of 6 dimensions
Causal Agent
Host Plants
Symptoms
Management
GDD Threshold
Regional Notes

Leaf spots develop and shoots wilt or become blighted. This indicates serious bacterial infection. Remove affected material and improve conditions.

Remove and destroy infected stems. Disinfect pruning shears before cutting more stems. Remove affected tissue promptly, cutting into healthy wood. Improve air circulation by thinning dense growth and avoid overhead watering during susceptible periods. Preventive fungicide applications may help where the problem recurs annually.

Quick Reference

Causal Agent
Pseudomonas syringae
Host Plants
8

Management

Cultural Controls

  • Remove and destroy infected stems.
  • Disinfect pruning shears before cutting more stems.

Host Plants (8)