610.525.1562
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.
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 is Pennsylvania’s most important apple disease, attacking wild and cultivated apple and crabapple.
Affected Species:
Many species of aphids or plant lice occur on ornamental trees and shrubs in Pennsylvania.
Affected Species:
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