Other Diseases of Fruit Trees

•  
• Apple pests
• Apricot pests
• Cherry pests
•  Peach/nectarine pests
•  Pear pests
•  Plum pests 

HOST	DISEASE	PATHOGEN	OCCURRENCE
Apple	Apple scab	Venturia inaequalis	Rare
	Bitter pit	physiological	Widespread
	Blister bark	genetic	Rare
	Crown gall	Agrobacterium tumefaciens	Occasional
	Crown rot/collar rot	Phytophthora cactorum	Occasional
	Fire blight	Erwinia amylovora	Widespread
	Jonathon spot	Calcium deficiency	Occasional
	Perennial canker	Cytospora sp.	Occasional
	Powdery mildew	Podosphaera leucotricha	Widespread
Apricot	Bacterial canker	Pseudomonas syringae	Widespread
	Brown rot	Monilinia spp.	Rare
	Coryneum blight or shothole	Wilsonomyces carpophilus	Widespread
	Crown gall	Agrobacterium tumefaciens	Rare
	Crown rot/collar rot	Phytophthora spp.	Rare
Cherry	Bacterial blight	Pseudomonas syringae	Occasional
	Coryneum blight	Wilsonomyces carpophilus	Occasional
	Crown gall	Agrobacterium tumefaciens	Rare
	Crown rot/collar rot	Phytophthora spp.	Occasional
	Lesion nematode	Pratylenchus spp.	Rare
	Perennial canker	Cytospora sp.	Occasional
	Powdery mildew	Podoshpaera oxycanthae	Widespread
	Wilt	Verticillium dahliae	Rare
	Western X	phytoplasma	Rare
Peach and Nectarine	Brown rot	Monilinia fructicola	Occasional
	Coryneum blight or shothole	Wilsonomyces carpophilus	Widespread
	Crown gall	Agrobacterium tumefaciens	Rare
	Leaf curl	Taphrina deformans	Occasional
	Perennial canker	Cytospora sp.	Widespread
	Powdery mildew	Sphaerotheca pannosa	Occasional
	Rusty spot	Podosphaera leucotricha	Widespread
	Wilt	Verticillium dahliae	Occasional
Pear	Fire blight	Erwinia amylovora	Widespread
	Pear decline	phytoplasma	Rare
	Perennial canker	Cytospora sp.	Occasional
	Powdery mildew	Podosphaera leucotricha	Occasional
Plum/Prune	Crown gall	Agrobacterium tumefaciens	Rare
	Perennial canker	Cytospora sp.	Widespread
	Prunus ring spot	virus	Unknown