Ornamental Plum: Armillaria root rot Categories: Ornamental Plum Ornamental Plum Diseases Ornamental trees Ornamentals Last review date: 2025-06-29 08:33 White fungal mat of Armillaria root rot infecting trunk Photo by: C.R. Foss Biology Armillaria root rot is a fungal disease transmitted between plants by root contact. Armillaria is often found in newly cleared soils or […]
Ornamental Plum: Brown rot Categories: Ornamental Plum Ornamental Plum Diseases Ornamental trees Ornamentals Last review date: 2025-06-29 08:34 Brown rot blossom infection Photo by: R.S. Byther Biology Brown rot is a fungal disease which initially infects the flowers. The petals turn light brown, develop water-soaked spots and may have tan or grayish areas of fungal […]
Ornamental Plum: Crown gall Categories: Ornamental Plum Ornamental Plum Diseases Ornamental trees Ornamentals Last review date: 2025-06-29 10:33 Large gall on crown Photo by: R.S. Byther Biology Crown gall is a bacterial infection that can attack through wounds to the lower trunk, crown, or larger roots. Susceptible plants first develop soft warty or spongy swellings […]
Ornamental Plum: Cytospora canker Categories: Ornamental Plum Ornamental Plum Diseases Ornamental trees Ornamentals Last review date: 2025-06-29 10:34 Cytospora-infected peach twigs Photo by: R.S. Byther Biology Cytospora canker infects the bark and cambium (the growing layer beneath the bark) and may be found in the outer layers of wood. Cuts into newly infected areas often […]
Ornamental Plum: Plum pockets Categories: Ornamental Plum Ornamental Plum Diseases Ornamental trees Ornamentals Last review date: 2025-06-29 10:35 Plum pocket infected fruit Photo by: R.S. Byther Biology Plum pockets is caused by a fungal infection of the leaves, twigs, and small branches. The fungus overwinters on twigs or bud scales. Infection occurs on young plant […]
Ornamental Plum: Shothole (Coryneum blight) Categories: Ornamental Plum Ornamental Plum Diseases Ornamental trees Ornamentals Last review date: 2025-06-29 10:37 Coryneum blight symptoms on leaves and fruit Photo by: R.S. Byther Biology Coryneum blight is a fungal disease. Lesions on leaves are initially small, purplish, round to oval areas which expand into brown spots with light […]
Ornamental Plum: Silver leaf Categories: Ornamental Plum Ornamental Plum Diseases Ornamental trees Ornamentals Last review date: 2025-06-29 10:40 Silver leaf symptoms on leaves Photo by: R.S. Byther Biology Silver leaf is a fungal disease which attacks the shoots, branches, trunk, and roots. The fungus is usually a saprophyte living on dead plant tissues, but it […]
Ornamental Plum: Viruses Categories: Ornamental Plum Ornamental Plum Diseases Ornamental trees Ornamentals Last review date: 2025-06-29 10:42 Virus infection causing poor growth on branches Photo by: R.S. Byther Biology Virus diseases in prunes and plums cause many variable symptoms depending on the virus strain and the cultivar affected. For instance, tomato ringspot virus can cause […]
Ornamental Plum: Hop aphid Categories: Ornamental Plum Ornamental Plum Insects Ornamental trees Ornamentals Last review date: 2025-06-29 10:43 Aphid colony Photo by: Unknown Biology Hop aphids are yellowish to bluish green in color. They feed on plum, prune, cherry, and other hosts in the winter, then migrate to a summer host such as hops or […]
Ornamental Plum: Leaf curl plum aphid Categories: Ornamental Plum Ornamental Plum Insects Ornamental trees Ornamentals Last review date: 2025-06-29 10:45 Leaf curl plum aphids Photo by: R.D. Akre Biology The leaf curl plum aphid is typically pale green to yellow in color during the summer and darker green to brown later in the year. The […]