Cherry: Armillaria root rot Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-22 12:59 Last edit date: White fungal mat of Armillaria root rot infecting trunk Photo 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 […]
Cherry: Bacterial canker Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-08-28 02:29 Last edit date: Bacterial canker on tree trunk Photo 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 […]
Cherry: Black knot Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-22 01:41 Last edit date: Mature black knot on twig Photo 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. […]
Cherry: Brown rot blossom blight and fruit rot Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-08-28 02:15 Last edit date: Scientific name: Family: Cycle: Plant type: Brown rot blossom infection Photo by: R.S. Byther Biology Brown rot is a blossom-infecting fungal disease. Infected flowers wilt and die. The brown blossoms remain attached to […]
Cherry: Crown gall Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-22 02:23 Last edit date: Large gall on crown Photo 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 […]
Cherry: Cytospora canker Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 09:57 Last edit date: Cytospora-infected peach twigs Photo 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. […]
Cherry: Dead bud Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-08-28 01:56 Last edit date: Dead buds on branch Photo 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 […]
Cherry: Gumming (Gummosis) Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 10:24 Last edit date: Cherry gummosis in branch crotch Photo by: R.S. Byther Biology Gumming of cherry can be caused by several factors. It can be a physiological reaction to unfavorable growing conditions. Trees growing in damp conditions often produce gum, as […]
Cherry: Leaf spot Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-08-28 02:15 Last edit date: Cherry leaf spot symptoms Photo by: C.R. Foss Biology Leaf spot of cherry causes purple to reddish-brown spots on the leaves. The spots are up to 1/10″ in diameter. In wet weather, the underside of the spots may […]
Cherry: Little cherry Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 10:43 Last edit date: Little cherry virus symptoms on fruit Photo by: OSU slide library Biology Little cherry is caused by a virus transmitted by the apple mealybug and by grafting. Affected trees show symptoms primarily on the fruit, which may be […]