Ornamental Plum: Hop aphid categories: Ornamental Plum Ornamental Plum Insects Ornamental trees Ornamentals revision date: 2024-06-05 02:04 Aphid colonyPhoto 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 sunflower. Some aphids […]
Ornamental Plum: Leaf curl plum aphid categories: Ornamental Plum Ornamental Plum Insects Ornamental trees Ornamentals revision date: 2024-06-05 02:04 Leaf curl plum aphidsPhoto 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 aphids overwinter […]
Ornamental Plum: Peachtree borer categories: Ornamental Plum Ornamental Plum Insects Ornamental trees Ornamentals revision date: 2024-06-05 10:40 Peachtree borer and damage at base of treePhoto by: K. Grey Biology The western peachtree borer is the larvae of a clear-winged moth. Adult moths are blue-black, about 1″ across, have mostly transparent wings, and appear somewhat wasp-like. […]
Ornamental Plum: Pear slug categories: Ornamental Plum Insects Ornamental trees Ornamentals revision date: 2023-04-04 12:00 Pear slug and damaged leaf from feedingPhoto by: R.D. Akre Biology Pear slugs, or pear sawflies, are insect larvae which resemble a small greenish or black slug. They are typically 1/4″ to 1/2″ long, tadpole-shaped, and produce large amounts of […]
Ornamental Plum: Scales categories: Ornamental Plum Ornamental Plum Insects Ornamental trees Ornamentals revision date: 2024-06-05 02:04 Lecanium scales on twigPhoto by: R.S. Byther Biology Various species of scales attack ornamental plum trees. Depending on species, scales may be found on the upper or lower surfaces of leaves, or on twigs and branches. Symptoms of scale […]
Ornamental Pear: Fire blight categories: Ornamental Pear Ornamental Pear Diseases Ornamental trees Ornamentals revision date: 2024-06-05 10:24 Biology Fire blight is a bacterial infection which typically attacks via wounds or blossoms. Initially, twigs and flowers appear water-soaked. Infected tissues quickly turn brown to black and die back, often bending over in a characteristic “shepherd’s crook.” […]
Ornamental Pear: Pear trellis rust categories: Ornamental Pear Ornamental Pear Diseases Ornamental trees Ornamentals revision date: 2022-11-28 08:55 Upper and lower leaf surface on Pyrus sp.Photo by: F. Geller-Grimm, commons.wikimedia.org Biology Pear trellis rust is a fungal disease that attacks pear trees and junipers. It is commonly reported on pear leaves in western Washington. Like […]
Ornamental Pear: Powdery mildew categories: Ornamental Pear Ornamental Pear Diseases Ornamental trees Ornamentals revision date: 2024-06-05 02:08 Powdery mildew on apple leavesPhoto by: R.S. Byther Biology Powdery mildew is a fungal disease found on twigs, leaves, blossoms, and fruit. New growth is particularly susceptible. The entire terminal may become covered with powdery mildew. Leaves develop […]
Ornamental Pear: Pseudomonas blossom blast and dieback categories: Ornamental Pear Ornamental Pear Diseases Ornamental trees Ornamentals revision date: 2022-11-27 04:00 Pseudomonas cankers on pear twigsPhoto by: R.S. Byther Biology Blossom blast and dieback is caused by a bacterial infection. The infection causes buds to turn a papery brown and die. Leaves may be spotted. Flower […]
Ornamental Pear: Aphids categories: Ornamental Pear Ornamental Pear Insects Ornamental trees Ornamentals revision date: 2024-06-05 02:04 Green peach aphid closeupPhoto by: Unknown Biology Three aphids are commonly found infesting pear. All three species produce honeydew, a sweet, sticky material which attracts ants and that may become covered with a growth of dark sooty mold. Honeydew […]