Plum, Prune (Fresh): Armillaria root rot categories: Plum, Prune (fresh) Plum, Prune (Fresh) 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 […]
Plum, Prune (Fresh): Bacterial canker categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits revision date: 2022-12-05 12:00 Sunken area on trunk from bacterial canker infectionPhoto by: R.S. Byther Biology Bacterial canker can infect twigs, branches, fruit, or the trunk. Elongate, dark, purplish cankers develop during early spring, often producing bacterial ooze in wet […]
Plum, Prune (Fresh): Black knot categories: Plum, Prune (fresh) Plum, Prune (Fresh) 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 […]
Plum, Prune (Fresh): Brown rot categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits revision date: 2022-12-05 12:00 Brown rot mummified plumPhoto 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 the twigs, becoming covered with […]
Plum, Prune (Fresh): Crown gall categories: Plum, Prune (fresh) Plum, Prune (Fresh) 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 […]
Plum, Prune (Fresh): Cytospora canker categories: Plum, Prune (fresh) Plum, Prune (Fresh) 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 […]
Plum, Prune (Fresh): Plum pockets categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits revision date: 2022-12-05 12:00 Plum pocket infected fruitPhoto 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 later turn reddish to velvety […]
Plum, Prune (Fresh): Russeting categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits revision date: 2022-12-05 12:00 Fruit russeting on plumPhoto 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 by wind, or other injury […]
Plum, Prune (Fresh): Shothole (Coryneum blight) categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits revision date: 2022-12-05 12:00 Coryneum blight symptoms on leaves and fruitPhoto by: R.S. Byther Biology Coryneum blight is a fungal disease. Lesions on leaves are initially small, purplish, round to oval areas which expand into brown spots with light […]
Plum, Prune (Fresh): Silver leaf categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits revision date: 2022-12-05 12:00 Silver leaf symptoms on leavesPhoto 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 it can infect living tissues […]
Plum, Prune (Fresh): Virus diseases categories: Plum, Prune (fresh) Plum, Prune (Fresh) Diseases Tree Fruits revision date: 2022-12-05 12:00 Virus infection causing poor growth on branchesPhoto by: R.S. Byther Biology Virus diseases in prunes and plums cause many variable symptoms depending on the virus strain and the cultivar affected. For instance, tomato ringspot virus can […]
Plum, Prune (Fresh): Aphids categories: Plum, Prune (fresh) Plum, Prune (Fresh) Insects Tree Fruits revision date: 2024-04-08 11:46 Leaf curl plum aphidPhoto by: A.L. Antonelli Biology Several aphid species can be found on plums, including the hop aphid and the leaf curl plum aphid. The hop aphid is yellowish to dark green. The leaf curl […]
Plum, Prune (Fresh): Apple-and-thorn skeletonizer categories: Plum, Prune (fresh) Plum, Prune (Fresh) Insects Tree Fruits revision date: 2022-12-05 12:00 Apple-and-thorn skeletonizer caterpillar feeding on leafPhoto by: A.L. Antonelli Biology The adult of the apple-and-thorn skeletonizer is a small dark-brown or reddish-brown moth. It overwinters as a pupa or an adult, with the females laying eggs […]
Plum, Prune (Fresh): Brown marmorated stink bug categories: Plum, Prune (fresh) Plum, Prune (Fresh) Insects Tree Fruits revision date: 2023-04-04 12:00 Brown marmorated stink bug adultPhoto by: M. Bush Biology The brown marmorated stink bug (BMSB) is an introduced pest species from Asia that is spreading quickly across the United States. Nymphs and adults feed […]
Plum, Prune (Fresh): Earwigs categories: Plum, Prune (fresh) Plum, Prune (Fresh) Insects Tree Fruits revision date: 2023-04-04 12:00 Adult European earwigPhoto by: M. Bush Biology Earwigs are reddish-brown insects about 3⁄4″ or less in length. Both males and females have pincers at the rear end. Earwigs are largely beneficial, feeding on many pests such as […]
Plum, Prune (Fresh): Fruittree leafroller categories: Plum, Prune (fresh) Plum, Prune (Fresh) Insects Tree Fruits revision date: 2022-12-05 12:00 Greenish leafroller larva with brown headPhoto by: K. Grey Biology The larvae of the fruittree leafroller feed on leaves, flower parts, and sometimes young fruit. They are pale to dark green with a shiny black head […]
Plum, Prune (Fresh): Leafhoppers categories: Plum, Prune (fresh) Plum, Prune (Fresh) Insects Tree Fruits revision date: 2022-12-05 12:00 Leafhoppers and damage on apple leafPhoto by: E.H. Beers Biology Leafhoppers are typically found on the underside of leaves. Immature leafhoppers (nymphs) are usually less than 1⁄10″ long and white to greenish or yellowish in color. Adults […]
Plum, Prune (Fresh): Pacific flatheaded borer categories: Plum, Prune (fresh) Plum, Prune (Fresh) Insects Tree Fruits revision date: 2022-12-05 12:00 Pacific flatheaded borer adultPhoto by: K. Grey Biology The Pacific flatheaded borer typically attacks weakened, injured, or stressed trees. The larvae feed between the bark and the sapwood. They can weaken and girdle trees. Injured […]
Plum, Prune (Fresh): Peach twig borer categories: Plum, Prune (fresh) Plum, Prune (Fresh) Insects Tree Fruits revision date: 2022-12-05 12:00 Peach twig borer caterpillarPhoto by: K. Grey Biology The peach twig borer attacks both shoots and fruit. In the spring, overwintering larvae bore down the center of shoots, causing the tip to wilt or “flag”. […]
Plum, Prune (Fresh): Peachtree borer categories: Plum, Prune (fresh) Plum, Prune (Fresh) Insects Tree Fruits revision date: 2022-12-05 12:00 Peachtree borer and damage at base of treePhoto by: K. Grey Biology The peachtree borer adult is a dark, bluish, clear-winged moth which somewhat resembles a wasp or hornet. The female, which has dark forewings and […]