An important disease which affects many trees of the Rosaceae (e.g. apple, pear, and hawthorn). Infected trees have the appearance of having been scorched by fire; the tree may be killed within months. The causal agent is the bacterium Erwinia amylovora. The disease occurs in North America and in many parts of Europe; it is notifiable in Britain.
Subjects: Plant Sciences and Forestry — Ecology and Conservation.