Crown Gall
Crown Gall
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Symptoms: Crown gall is a tumorous growth of tissue up to several inches or more in diameter. It is generally found at the soil line or on roots and usually has a rough surface. Crown galls differ from natural burls. Burls are hard and woody like the trunk wood, whereas the crown galls are "punky," more like rotting wood.
Cause: Crown gall is a disease caused by a bacterium. The crown gall bacterium lives in the soil and enters the plant at the site of a wound, perhaps from a shovel or a lawn mower. Once inside the plant, the bacteria stimulates gall formation. Infected plants often grow very slowly and continue to decline in vigor year after year.
Control: Avoid wounding plants when transplanting, cultivating or mowing. Dig up and destroy infected plants, removing the surrounding soil carefully and disposing of it away from cultivated plants. Replant with resistant plants. All types of narrow-leaved evergreens are immune to crown gall.
Visuals associated with this text.
| Visual title - Visual size | Visual title - Visual size |
|---|---|
| Crown gall on euonymus - 59K | Crown gall on rose - 62K |
