Camellia: Cold injury categories: Camellia Camellia Diseases Ornamentals Shrubs last review date: 2025-06-28 03:07 Browning on camellia flower edges from cold damage Photo by: R.S. Byther Biology Camellia leaves are sensitive to direct sunlight, which kills leaf tissue. Sunburn occurs when the shrub is planted in full sun or against a south- or west-facing wall. […]
Camellia: Flower and petal blight categories: Camellia Camellia Diseases Ornamentals Shrubs last review date: 2026-03-21 12:29 Camellia flower blight: healthy vs. diseased blooms Photo by: OSU slide library Biology Flower and petal blight is a fungal disease of camellia flowers. Leaves, stems, and roots are not attacked. Symptoms begin with development of brown spots on […]
Camellia: Leaf gall categories: Camellia Camellia Diseases Ornamentals Shrubs last review date: 2026-03-21 12:35 Camellia leaf gall Photo by: R.S. Byther Biology Leaf gall is caused by a fungus, and results in the formation of off-colored, thick, fleshy leaves in early spring, shortly after bud break. Through April and May, the galls are obvious and […]
Camellia: Oedema categories: Camellia Camellia Diseases Ornamentals Shrubs last review date: 2026-03-21 12:51 Oedema on camellia Photo by: B.M. Johnson Biology Oedema, or edema, is a condition which may result from excess water in the soil or high humidity. Usually found on the lower leaf surface, oedemas initially resemble protruding watery blisters or galls. Later […]
Camellia: Ramorum leaf and shoot blight (Sudden oak death) categories: Camellia Camellia Diseases Ornamentals Shrubs last review date: 2026-03-21 01:06 P. ramorum symptoms on Camellia sinensis leaves Photo by: M. Elliott Biology Ramorum leaf blight is caused by Phytophthora ramorum, the same organism that causes sudden oak death (SOD). In Washington, most cases have been […]
Camellia: Sooty mold (Black mold) categories: Camellia Camellia Diseases Ornamentals Shrubs last review date: 2026-03-21 03:03 Camellia sooty mold (black mold) Photo by: R.S. Byther Biology Sooty mold is a fungal growth often found on plants infested with honeydew-producing insects, such as aphids and scales. The fungus does not attack the plant but simply grows […]
Camellia: Sunburn categories: Camellia Camellia Diseases Ornamentals Shrubs last review date: 2026-03-21 03:12 Sunburn on camellia leaves Photo by: R.S. Byther Biology Camellia leaves are sensitive to direct sunlight, which kills leaf tissue. Sunburn occurs when the shrub is planted in full sun or against a south- or west-facing wall. It only takes one hot […]
Camellia: Virus categories: Camellia Camellia Diseases Ornamentals Shrubs last review date: 2026-03-21 03:33 Camellia yellow mottle leaf virus Photo by: R.S. Byther Biology The camellia yellow mottle leaf virus is transmitted by propagating from an infection plant or by grafting from an infected plant to a healthy one. Sometimes the virus is purposefully transmitted to […]
Camellia: Aphids categories: Camellia Camellia Insects Ornamentals Shrubs last review date: 2026-03-21 11:23 Aphid colony on leaf Photo by: A.L. Antonelli Biology Camellias are infested by black citrus aphids and other aphids. The black citrus aphid is a small reddish-brown to black insect typically found on new growth and flower buds. These aphids may be […]
Camellia: Brown soft scale categories: Camellia Camellia Insects Ornamentals Shrubs last review date: 2026-03-21 11:48 Brown soft scales Photo by: R.S. Byther Biology Brown soft scales are yellowish to dark brown insects (adults are usually darker). They are found mainly on twigs, although young scales may also be found on the foliage, typically on the […]