Filbert: Lecanium scale categories: Filbert Filbert Insects Tree Fruits revision date: 2024-06-05 08:31 Lecanium scales on twigPhoto by: R.S. Byther Biology Lecanium scales are shiny brown insects found on twigs. Adults are 1/8″-1/4″ in diameter and roughly turtle-shaped. They may have light markings or appear somewhat waxy. Crawlers (immature scales) are flatter. Scales produce large […]
Filbert: Omnivorous leaftier categories: Filbert Filbert Insects Tree Fruits revision date: 2024-06-05 02:07 Necrosis on leaf from leaftier feedingPhoto by: K. Grey Biology The omnivorous leaftier is the caterpillar of a bell-shaped tortricid moth. The small larvae tend to be quite active when disturbed, often wiggling vigorously backwards or dropping from the plant on a […]
Filbert: Tent caterpillars categories: Filbert Filbert Insects Tree Fruits revision date: 2022-12-05 12:00 Tent caterpillars and webbingPhoto by: R.S. Byther Biology Two species of tent caterpillar are common in Washington. The forest tent caterpillar is about 2″ long at maturity and has a bluish body with black and white markings. This species makes silk mats […]
Cherry: Armillaria root rot categories: Cherry Cherry Diseases Tree Fruits revision date: 2022-12-05 12:00 White fungal mat of Armillaria root rot infecting trunkPhoto by: C.R. Foss Biology Armillaria root rot is a fungal disease often found in newly cleared soils or soils which have been flooded. Aboveground symptoms typically include production of smaller-than-normal leaves, leaf […]
Cherry: Bacterial canker categories: Cherry Cherry 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 […]
Cherry: Black knot categories: Cherry Cherry Diseases Tree Fruits revision date: 2022-12-05 12:00 Mature black knot on twigPhoto by: R. Byther Biology Black knot is a fungal disease that infects cherry and plum. Early infections of twigs are elongated olive-green, corky knots. They turn black and hard as they mature. Every year they expand lengthwise. […]
Cherry: Brown rot blossom blight and fruit rot categories: Cherry Cherry Diseases Tree Fruits revision date: 2024-06-05 02:03 Brown rot blossom infectionPhoto 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 […]
Cherry: Crown gall categories: Cherry Cherry 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 […]
Cherry: Cytospora canker categories: Cherry Cherry 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 […]
Cherry: Dead bud categories: Cherry Cherry Diseases Tree Fruits revision date: 2022-12-05 12:00 Dead buds on branchPhoto by: R.S. Byther Biology Dead bud is a common symptom caused by the same bacterium which causes bacterial cankers. Initial symptoms are death of buds on lower branches of the affected trees. This begins in February prior to […]