Hawthorn: Fire blight categories: Hawthorn Hawthorn Diseases Ornamental trees Ornamentals revision date: 2022-11-22 03:22 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 wilt, turn black and die back, presenting a “scorched” appearance. Purplish cankers […]
Hawthorn: Leaf spot categories: Hawthorn Hawthorn Diseases Ornamental trees Ornamentals revision date: 2022-11-22 03:16 Hawthorn leaf spotPhoto 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 lower leaf surface. The spots […]
Hawthorn: Rust categories: Hawthorn Hawthorn Diseases Ornamental trees Ornamentals revision date: 2022-11-22 03:07 Rust pustules on underside of serviceberry leaf and on petiolePhoto 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 and fruit. Initial symptoms are […]
Hawthorn: Scab categories: Hawthorn Hawthorn Diseases Ornamental trees Ornamentals revision date: 2022-11-22 02:48 Apple scab on leaves and young fruitPhoto 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 initially causes small pale, watersoaked […]