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Russian Hawthorn

Crataegus ambigua

Rosaceae · broadleaf · introduced

Quick Facts

Height
15–40 ft
Light
Full Sun
Hardiness
Zone Zones 5a–8b
Origin
southern Russia ambigua: uncertain, doubtful (an apparent

Diseases (6)

Venturia inaequalis Scab
Thekopsora minima and Naohidemyces vaccinii Rust
Various fungi (Phyllosticta spp., Septoria spp., Cercospo... Leaf Spot
Erwinia amylovora Fire Blight
Cytospora spp. (synonyms: Leucostoma, Valsa) Canker
Podosphaera aphanis var. aphanis Powdery Mildew

Pests (12)

Tetranychidae Spider mite
Scale insect
Pear slug
Hawthorn aphid
Apple-and-thorn skeletonizer
Acanthococcus azaleae Azalea bark scale
Enarmonia formosana Cherry bark tortrix
Fall webworm
Tortricidae Leafroller
Caliroa cerasi Pear sawfly (pear slug)
Malacosoma spp. Tent caterpillar
Pear sawfly