Pear: Pear psylla categories: Pear Pear Insects Tree Fruits revision date: 2024-06-05 02:07 Pear psylla adultPhoto by: E.C. Burts Biology The brownish-gray adult pear psylla is about 1⁄10″ long, with clear wings held rooflike over the body. The wings may have a smoky gray spot halfway along the inner margin. The red-eyed nymphs range in […]
Pear: Pear slug (pear sawfly) categories: Pear Pear Insects Tree Fruits revision date: 2024-06-05 10:40 Pear slug and damaged leaf from feedingPhoto by: R.D. Akre Biology The pear sawfly is also known as the pear slug (or ‘cherry slug,’ when on cherry) because of its resemblance to a small, dark slug. These insects are the […]
Pear: Pearleaf blister mite categories: Pear Pear Insects Tree Fruits revision date: 2024-06-05 08:29 Pearleaf blister mite damagePhoto by: C.R. Foss Biology Pearleaf blister mites are tiny, white to yellowish eriophyid mites that feed on leaves and fruit. Damage on leaves is caused by mites feeding inside the leaf tissues, resulting in the formation of […]
Pear: San Jose scale categories: Pear Pear Insects Tree Fruits revision date: 2024-06-05 02:04 San Jose scale closeupPhoto by: K. Grey Biology San Jose scale is an armored (hard) scale found on many deciduous trees and shrubs including apple, cherry, elm, maple, poplar, and willow. The scale insects are about 1⁄16″ in diameter. The female […]
Pear: Spider mites categories: Pear Pear Insects Tree Fruits revision date: 2024-06-05 02:04 Spider mites under microscopePhoto by: L.K. Tanigoshi Biology Several species of spider mites may be found on pear leaves, including the twospotted and McDaniel spider mites and the European red mite. They may be various colors including yellow, greenish, brown, or red. […]
Peach: Bacterial canker categories: Peach Peach Diseases Tree Fruits revision date: 2024-06-05 10:24 Bacterial canker on tree trunkPhoto by: R.S. Byther Biology Bacterial canker is favored by cool, wet weather and is common in western Washington. The bacteria overwinter in cankers, buds and other host tissues. Dark cankered areas on trunks and branches may develop […]
Peach: Brown rot categories: Peach Peach Diseases Tree Fruits revision date: 2024-06-05 02:07 Brown rot infected peachPhoto by: R.S. Byther Biology Brown rot is a blossom-infecting fungal disease. Infected flowers wilt and die. The brown blossoms remain attached to the twigs, becoming covered with a grayish-brown fungal growth during wet weather. Blossom or fruit infections […]
Peach: Crown gall categories: Peach Peach Diseases Tree Fruits revision date: 2022-12-05 12:00 Large gall on crownPhoto by: R.S. Byther Biology Crown gall is caused by a soilborne bacterium. The bacteria infect through wounds on the crown and roots. Young galls are fleshy, white, enlarged masses on the roots or stems. Older galls are hardened […]
Peach: Cytospora canker categories: Peach Peach Diseases Tree Fruits revision date: 2022-12-05 12:00 Cytospora-infected peach twigsPhoto by: R.S. Byther Biology The fungi which cause Cytospora canker attack through wounds on twigs and branches. Initial cankers are small, but enlarge quickly and may streak up and down the stems without girdling. The cankers may also girdle […]
Peach: Leaf curl categories: Peach Peach Diseases Tree Fruits revision date: 2024-06-05 02:07 Peach leaf curl distorted growthPhoto by: R.S. Byther Biology Peach leaf curl is a fungal disease affecting primarily the leaves and shoots. Fruit is occasionally attacked. Young leaves develop yellow to reddish discoloration and become thickened, crisp, and crinkled. Affected leaves are […]