Cherry: Armillaria root rot Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-22 12:59 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 production of smaller-than-normal […]
Cherry: Bacterial canker Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-22 01:27 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 trunks and branches […]
Cherry: Black knot Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-22 01:41 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. Every year they […]
Cherry: Brown rot blossom blight and fruit rot Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-22 02:03 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 the twigs, becoming […]
Cherry: Crown gall Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-22 02:23 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 stems. Older galls […]
Cherry: Cytospora canker Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 09:57 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. The cankers may […]
Cherry: Dead bud Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 10:08 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 begins in February […]
Cherry: Gumming (Gummosis) Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 10:24 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 do trees which […]
Cherry: Leaf spot Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 10:33 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 produce cream-colored to […]
Cherry: Little cherry Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 10:43 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 smaller than normal, […]
Cherry: Mottle leaf Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 11:02 Cherry mottle leaf virus symptoms on leaves Photo by: R.S. Byther Biology Mottle leaf is a virus disease of cherries. Symptoms are seen mainly on the leaves, which are puckered and mottled with light green to yellow blotches between the veins. […]
Cherry: Necrotic rusty mottle Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 11:14 Necrotic rusty mottle symptoms on cherry leaves Photo by: R.S. Byther Biology Necrotic rusty mottle is believed to be caused by a virus. Affected trees are slower to leaf out and bloom in the spring. Terminal buds may be killed, […]
Cherry: Powdery mildew Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-23 11:35 Powdery mildew on leaf Photo by: G.G. Grove Biology Powdery mildew attacks leaves, young shoots, and fruit. This fungaldisease initially produces a light green, circular spot on either leaf surface. Later, a characteristic white, powdery coating of the fungus appears, typically […]
Cherry: Prunus necrotic ringspot Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-25 10:19 Prunus necrotic ringspot virus symptoms Photo by: M.L. Putnam Biology Prunus necrotic ringspot is a viral disease affecting most cultivated Prunus species. Leaves may show various symptoms including brown, sunken, necrotic spots; chlorotic (yellowish to white) blotches or other patterns; […]
Cherry: Shothole (Coryneum blight) Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-25 10:39 Coryneum blight symptoms on leaves and fruit Photo by: R.S. Byther Biology Shothole is a fungal disease typically attacking leaves and fruit on cherry. Lesions on leaves are initially small, purplish, round to oval areas which expand into brown spots […]
Cherry: Verticillium wilt Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-25 11:01 Vascular discoloration in branch from Verticillium wilt Photo by: C.R. Foss Biology Verticillium wilt is caused by a soilborne fungus. It infects via the roots and then spreads throughout the plant. Aboveground symptoms include suddenly wilted yellow or brown foliage which […]
Cherry: Witches’-broom (Cherry leaf curl) Categories: Cherry Cherry Diseases Tree Fruits Last review date: 2026-03-25 11:28 Witches’ broom symptoms on cherry branches Photo by: R.S. Byther Biology Witches’ brooms disease of cherry is a fungal disease similar to peach leaf curl. Infected branches develop large, dense, broomlike tufts of foliage. These branches typically do not […]