WSU Extension

Hortsense

Camellia
 
Disease
Cold injury 
Flower and petal blight 
Leaf gall 
Oedema 
Ramorum leaf and shoot blight (Sudden oak death) 
Sooty mold (Black mold) 
Sunburn 
Virus 
Insect
Aphids 
Brown soft scale 
Cottony camellia scale 
Root weevils 



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Caption: Camellia leaf gall
Photo by: R.S. Byther
  
Camellia : Leaf gall
(revision date: 4/23/2014)


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 greenish pink to rose in color. During the growing season, the galls shrivel and turn black, and eventually fall off. Although the symptoms appear dramatic, the damage is usually economically insignificant. In the nursery, however, it can cause tremendous damage if left unchecked. Young plants with few shoots can become severely malformed.
Management Options


Non-Chemical Management
  • Orient rows and space plants to maximize air flow and promote drying.
  • Schedule irrigation applications to avoid excessive leaf wetness, especially in spring.
  • Do not grow plants in heavy shade.
  • Identify, remove, and destroy galls in the spring to prevent spores from being released.
  • Plant resistant varieties, such as C. japonica which is heavily resistant.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption: Camellia leaf gall
Photo by: R.S. Byther