Plum, Prune (Fresh): Armillaria root rot Categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits Last review date: 2025-08-23 07:22 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 […]
Plum, Prune (Fresh): Bacterial canker Categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits Last review date: 2025-08-23 07:29 Last edit date: Sunken area on trunk from bacterial canker infection Photo by: R.S. Byther Biology Bacterial canker can infect twigs, branches, fruit, or the trunk. Elongated, dark, purplish cankers develop during early spring, often […]
Plum, Prune (Fresh): Black knot Categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits Last review date: 2025-08-23 07:30 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 […]
Plum, Prune (Fresh): Brown rot Categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits Last review date: 2026-08-28 02:15 Last edit date: Brown rot mummified plum Photo by: R.S. Byther Biology Brown rot is a blossom-infecting fungal disease. Infected flowers first appear water-soaked, then wilt and die. The light brown blossoms remain attached to […]
Plum, Prune (Fresh): Crown gall Categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits Last review date: 2025-08-23 07:34 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, […]
Plum, Prune (Fresh): Cytospora canker Categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits Last review date: 2025-08-23 07:36 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 […]
Plum, Prune (Fresh): Plum pockets Categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits Last review date: 2025-08-23 07:38 Last edit date: Plum pocket infected fruit Photo by: R.S. Byther Biology Plum pockets is a fungal disease affecting fruit, twigs, and leaves. Infected fruit initially develop small, white spots which rapidly enlarge. The spots […]
Plum, Prune (Fresh): Russeting Categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits Last review date: 2026-08-28 02:15 Last edit date: Fruit russeting on plum Photo by: R.S. Byther Biology Russeting of plum can be caused by several factors. Rain during the period of full bloom, mechanical rubbing against other fruit or branches caused […]
Plum, Prune (Fresh): Shothole (Coryneum blight) Categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits Last review date: 2026-08-28 02:15 Last edit date: Coryneum blight symptoms on leaves and fruit Photo by: R.S. Byther Biology Coryneum blight is a fungal disease. Lesions on leaves are initially small, purplish, round to oval areas which expand […]
Plum, Prune (Fresh): Silver leaf Categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits Last review date: 2025-08-23 07:43 Last edit date: Silver leaf symptoms on leaves Photo by: R.S. Byther Biology Silver leaf is a fungal disease affecting cherry, apricot, plum, and other stone fruits. The fungus typically grows on dead wood, but […]