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 […]