Crabapple
Malus
Malus is a genus of about 32–57 species of small deciduous trees or shrubs in the family Rosaceae, including the domesticated orchard apple, crab apples (sometimes known in North America as crabapples) and wild apples.
The genus is native to the temperate zone of the Northern Hemisphere.
Diseases Affecting Crabapple
Fire Blight
Fire blight is a disease caused by the bacterium Erwinia amylovora. Twigs, branches, and leaders on trees and shrubs wilt…
Affected Species:
Botryosphaeria Canker
The fungus Botryosphaeria can cause a branch dieback on many woody ornamentals. Cankers girdle and kill twigs and branches of species such as horsechestnut, redbud, dogwood, beech, walnut, tulip poplar, sweetgum, crabapple, pine, oak, rhododendron, azalea, rose, willow, elm, and yew. Small black fungal fruiting structures which contain fungal spores develop in the canker.
Affected Species:
Apple Scab
Apple scab is Pennsylvania’s most important apple disease, attacking wild and cultivated apple and crabapple.
Affected Species:
Insects Affecting Crabapple
Southern Red Mite
The female adult is about 0.38 mm long and resembles a small spider.
Affected Species:
Lecanium Scale
The European fruit lecanium is a key soft scale insect pest of shade trees and other woody ornamental plants in…
Affected Species:
Aphids
Many species of aphids or plant lice occur on ornamental trees and shrubs in Pennsylvania.
Affected Species:
Please give us a call if you have any questions about your trees and shrubs or would like to schedule an appointment for us to walk your property.
610.525.1562
