Peach: Bacterial canker categories: Peach Peach Diseases Tree Fruits revision date: 2022-12-05 12:00 Bacterial canker on tree trunkPhoto 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 may develop […]
Peach: Brown rot categories: Peach Peach Diseases Tree Fruits revision date: 2022-12-05 12:00 Brown rot infected peachPhoto 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 weather. Blossom or fruit infections […]
Peach: Crown gall categories: Peach Peach 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 or stems. Older galls are hardened […]
Peach: Cytospora canker categories: Peach Peach 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 girdling. The cankers may also girdle […]
Peach: Leaf curl categories: Peach Peach Diseases Tree Fruits revision date: 2022-12-05 12:00 Peach leaf curl distorted growthPhoto 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, and crinkled. Affected leaves are […]
Peach: Powdery mildew categories: Peach Peach Diseases Tree Fruits revision date: 2022-12-05 12:00 Powdery mildew on peach fruit showing white fungal spotPhoto 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 leaves. Older leaves may show […]
Peach: Shothole (Coryneum blight) categories: Peach Peach Diseases Tree Fruits revision date: 2022-12-05 12:00 Coryneum blight stem cankersPhoto 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 which later become elongate brown […]
Peach: X-disease categories: Peach Peach Diseases Tree Fruits revision date: 2022-12-05 12:00 Peach x-disease symptoms on leavesPhoto 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 roll and the spots die […]
Peach: Aphids categories: Peach Peach Insects Tree Fruits revision date: 2023-04-08 12:00 Green peach aphid closeupPhoto 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 the plant tissues. Heavy infestations […]
Peach: Brown marmorated stink bug categories: Peach Peach Insects Tree Fruits revision date: 2023-04-04 12:00 Brown marmorated stink bugs feeding on peach fruitPhoto 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 States. Nymphs and adults feed […]