Camellia

Camellia: Cold injury

Camellia: Cold injury categories: Camellia Camellia Diseases Ornamentals Shrubs revision date: 2022-11-30 12:00 Browning on camellia flower edges from cold damagePhoto 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. Winter sunlight […]

Camellia: Flower and petal blight

Camellia: Flower and petal blight categories: Camellia Camellia Diseases Ornamentals Shrubs revision date: 2022-11-30 12:00 Camellia flower blight: healthy vs. diseased bloomsPhoto 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 the petals. […]

Camellia: Leaf gall

Camellia: Leaf gall categories: Camellia Camellia Diseases Ornamentals Shrubs revision date: 2022-11-30 12:00 Camellia leaf gallPhoto 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 range from […]

Camellia: Oedema

Camellia: Oedema categories: Camellia Camellia Diseases Ornamentals Shrubs revision date: 2022-11-30 12:00 Oedema on camelliaPhoto 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 the blisters […]

Camellia: Ramorum leaf and shoot blight (Sudden oak death)

Camellia: Ramorum leaf and shoot blight (Sudden oak death) categories: Camellia Camellia Diseases Ornamentals Shrubs revision date: 2022-11-30 12:00 P. ramorum symptoms on Camellia sinensis leavesPhoto 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 found in […]

Camellia: Sooty mold (Black mold)

Camellia: Sooty mold (Black mold) categories: Camellia Camellia Diseases Ornamentals Shrubs revision date: 2022-11-30 12:00 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 on the […]

Camellia: Sunburn

Camellia: Sunburn categories: Camellia Camellia Diseases Ornamentals Shrubs revision date: 2022-11-30 12:00 Sunburn on camellia leavesPhoto 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 summer day […]

Camellia: Virus

Camellia: Virus categories: Camellia Camellia Diseases Ornamentals Shrubs revision date: 2022-11-30 12:00 Camellia yellow mottle leaf virusPhoto by: R.S. Byther Biology The camellia yellow mottle leaf virus is transmitted by propagating from an infected plant or by grafting from an infected plant to a healthy one. Sometimes the virus is purposefully transmitted to foster variegated […]

Camellia: Aphids

Camellia: Aphids categories: Camellia Camellia Insects Ornamentals Shrubs revision date: 2022-11-30 12:00 Aphid colony on leafPhoto 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 found at […]

Camellia: Brown soft scale

Camellia: Brown soft scale categories: Camellia Camellia Insects Ornamentals Shrubs revision date: 2022-11-30 12:00 Brown soft scalesPhoto 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 underside of […]