Hawthorn: Fire blight Categories: Hawthorn Hawthorn Diseases Ornamental trees Ornamentals Last review date: 2026-05-15 11:49 Last edit date: Fire blight infected leaves Photo by: G.G. Grove Biology Fire blight is a bacterial infection of shoots which enters the plant through blossoms, vigorously growing shoot tips, young leaves, and wounds. Blossom clusters appear blighted. Shoots suddenly […]
Hawthorn: Leaf spot Categories: Hawthorn Hawthorn Diseases Ornamental trees Ornamentals Last review date: 2026-08-28 02:15 Last edit date: Hawthorn leaf spot Photo by: R.S. Byther Biology Leaf spot is a fungal disease which can infect hawthorn, photinia, pear, pyracantha, crabapple, and related species. Initial infections are small reddish-brown to grayish spots on the upper or […]
Hawthorn: Rust Categories: Hawthorn Hawthorn Diseases Ornamental trees Ornamentals Last review date: 2026-08-28 02:15 Last edit date: Rust pustules on underside of serviceberry leaf and on petiole Photo by: R.S. Byther Biology Rust is a fungal disease typically infecting leaves of hawthorn (occasionally also apple and crabapple). It may also be found on green stems […]
Hawthorn: Scab Categories: Hawthorn Hawthorn 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 hawthorn is caused by the same fungus that causes scab on apple and crabapple. The disease infects during wet weather in the spring and […]