Dogwood: Brown soft scale Categories: Dogwood Dogwood Insects Ornamental trees Ornamentals Last review date: 2026-09-29 06:57 Last edit date: Brown soft scales Photo by: R.S. Byther Biology Brown soft scales are yellowish to dark brown (adults are usually darker). They are found mainly on twigs, although young scales may also be found on foliage. They […]
Dogwood: Lecanium scale Categories: Dogwood Dogwood Insects Ornamental trees Ornamentals Last review date: 2026-09-29 06:57 Last edit date: Lecanium scales on twig Photo by: R.S. Byther Biology Lecanium scales are rounded brown (or mottled) insects. Adults are from 1/8″ to 1/4″ in diameter. Lecanium scales produce large amounts of sticky honeydew, which may have sooty […]
Dogwood: Anthracnose Categories: Dogwood Dogwood Diseases Ornamental trees Ornamentals Last review date: 2026-08-28 02:29 Last edit date: Dogwood anthracnose on leaves Photo by: R.S. Byther Biology Dogwood anthracnose is a fungal disease of leaves and twigs. It is found mainly on the native dogwoods, especially Pacific dogwood, but can also infect some ornamental dogwoods. The […]
Dogwood: Armillaria root rot Categories: Dogwood Dogwood Diseases Ornamental trees Ornamentals Last review date: 2026-04-25 10:42 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 transmitted between plants by root contact. Armillaria is often found in newly cleared soils or […]
Dogwood: Collar rot Categories: Dogwood Dogwood Diseases Ornamental trees Ornamentals Last review date: 2026-04-25 11:07 Last edit date: Phytophthora root rot infecting trunk Photo by: R.S. Byther Biology Collar rot is caused by a soilborne fungus which usually infects the plant through wounds on the trunk. It can also infect roots. A canker develops on […]
Dogwood: Leaf scorch and leaf roll Categories: Dogwood Dogwood Diseases Ornamental trees Ornamentals Last review date: 2026-04-25 11:14 Last edit date: Dogwood leaf scorch Photo by: R.S. Byther Biology Leaf scorch and leaf roll are results of stress. Leaf scorch is characterized by browning of the tips and margins of the leaves. Leaf roll is […]
Dogwood: Powdery mildew Categories: Dogwood Dogwood Diseases Ornamental trees Ornamentals Last review date: 2026-04-26 10:22 Last edit date: Powdery mildew on dogwood leaf Photo by: J. Chushcoff Biology Dogwood powdery mildew is caused by a fungus. It infects leaves, current-year twigs, blossoms, fruit, and buds. The first symptom is often yellow patchy areas on a […]
Dogwood: Oystershell scale Categories: Dogwood Dogwood Insects Ornamental trees Ornamentals Last review date: 2026-09-29 06:57 Last edit date: Severe oystershell scale infestation on twig Photo by: Unknown Biology Oystershell scale insects are usually found on trunks, branches, and twigs. They occur less frequently on the leaves and other plant parts. The mature scale is approximately […]