Fire blight of apple is caused by

Fire blight is a common and very destructive bacterial disease of apples and pears.

🦠 About Fire Blight

→ Caused by the bacterium Erwinia amylovora.
→ It can affect fruit, shoots, twigs, branches, blooms, and entire trees on apple and pear trees.
→ Older trees can tolerate persistent dieback for years, younger trees can be killed in a single season.

📌 Important Points

Diseases and causal organisms:

Crown gall: Agrobacterium tumefaciens
Gummosis: Pseudomonas syringae
Bacterial spot: Xanthomonas arboricola pv. pruni
Phony peach and plum leaf scald: Xylella fastidiosa
Almond leaf scorch: Phloem-limited fastidious bacteria