Peach: Bacterial canker Categories: Peach Peach 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 […]
Peach: Brown rot Categories: Peach Peach Diseases Tree Fruits Last review date: 2026-08-28 02:15 Last edit date: Brown rot infected peach 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 covered with a grayish-brown fungal growth during wet […]
Peach: Crown gall Categories: Peach Peach Diseases Tree Fruits Last review date: 2025-09-13 02:41 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 […]
Peach: Cytospora canker Categories: Peach Peach Diseases Tree Fruits Last review date: 2025-09-13 02:42 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. […]
Peach: Leaf curl Categories: Peach Peach Diseases Tree Fruits Last review date: 2026-08-28 02:29 Last edit date: Peach leaf curl distorted growth Photo by: R.S. Byther Biology Peach leaf curl is a fungal disease affecting primarily the leaves and shoots. Fruit is occasionally attacked. Young leaves develop yellow to reddish discoloration and become thickened, crisp, […]
Peach: Powdery mildew Categories: Peach Peach Diseases Tree Fruits Last review date: 2026-08-28 01:56 Last edit date: Powdery mildew on peach fruit showing white fungal spot Photo by: R.S. Byther Biology Powdery mildew of peach attacks leaves, young shoots, and fruit. This fungal disease produces a characteristic white, powdery coating on the surface of affected […]
Peach: Shothole (Coryneum blight) Categories: Peach Peach Diseases Tree Fruits Last review date: 2026-08-28 02:29 Last edit date: Coryneum blight stem cankers Photo by: R.S. Byther Biology Shothole is a fungal disease typically attacking buds, twigs, and fruit. Infected buds are killed and covered with a shiny, gummy material. Twigs develop small, raised purplish areas […]
Peach: X-disease Categories: Peach Peach Diseases Tree Fruits Last review date: 2025-09-13 04:19 Last edit date: Peach x-disease symptoms on leaves Photo by: Unknown Biology X-disease of peaches is caused by a mycoplasma-like organism (MLO). The MLO is transmitted by leafhoppers. Symptoms of infection typically appear in the summer. Leaves exhibit irregular yellow spotting. Leaves […]
Peach: Aphids Categories: Peach Peach Insects Tree Fruits Last review date: 2026-08-29 09:17 Last edit date: Green peach aphid closeup Photo by: Unknown Biology The green peach aphid is a soft-bodied, green aphid up to 1⁄8″ in length. It is typically found on peach leaves in the spring, where it feeds on sap sucked from […]
Peach: Brown marmorated stink bug Categories: Peach Peach Insects Tree Fruits Last review date: 2026-09-29 06:57 Last edit date: Brown marmorated stink bugs feeding on peach fruit Photo by: G. Bernon, USDA APHIS, bugwood.org Biology The brown marmorated stink bug (BMSB) is an introduced pest species from Asia that is spreading quickly across the United […]