Bacterial canker

Editorial diagnosis

Diagnosis overview

Bacterial blight covers bacterial damage to leaves, shoots, bark, or fruit.

In gardens, Bacterial canker can occur on plants including Apricot, Kiwi, Mulberry, Sour cherry. In the available profiles, it is linked mainly with Berries, Fruit, Legumes.

The recorded risk level is medium. Conditions that favour it include Wet weather or prolonged leaf wetness, Dense planting and poor airflow, Susceptible cultivars. It becomes serious with shoot dieback or valuable woody plants.

Compare upper and lower leaf surfaces, the boundary between healthy and damaged tissue, and spread after wet weather. Coatings, spores, or progressive rot support a disease diagnosis.

A common mistake is to identify a disease from one spot alone; weather, spread, and pathogen structures also need to fit.