Crabapple: Powdery mildew Categories: Crabapple Crabapple Diseases Ornamental trees Ornamentals Last review date: 2026-08-28 02:15 Last edit date: Powdery mildew on apple leaves Photo by: R.S. Byther Biology Powdery mildew of crabapple is typically seen on the foliage, but may also occur on twigs, blossoms, and fruit. Characteristic patches of white, powdery fungus develop on […]
Crabapple: Scab Categories: Crabapple Crabapple Diseases Ornamental trees Ornamentals Last review date: 2026-08-28 02:15 Last edit date: Apple scab on leaves and young fruit Photo by: R.S. Byther Biology Scab of crabapples is caused by the same fungus which causes scab on apple and hawthorn. The disease infects during wet weather in the spring and […]
Crabapple: Stem rot Categories: Crabapple Crabapple Diseases Ornamental trees Ornamentals Last review date: 2026-04-24 12:30 Last edit date: Crabapple stem rot: rotten stem has a dark blotch Photo by: R.P. Regan Biology Stem rot of crabapple is caused by a soil-borne fungus. This disease is most prevalent in the winter on nursery stock. The fungus […]