Dr. John F. Baniecki
WVU Extension Service
Plant Pathology and Entomology Specialist
August 2000

Crown gall, caused by the bacterium Agrobacterium tumefaciens, severely damages roses and other ornamental plants.

Gall-like growths vary in size and usually occur near the soil line, but may be found in the upper branches or on the roots. These galls first appear as small swellings and slowly increase in size. The effect on the host may not be noticed until the galls have attained a large size. Infected plants lose their vigor, produce abnormal blossoms and foliage, and become stunted.

Control: The following control measures are recommended.

1. Carefully inspect nursery stock before purchasing. Do not accept any plants that have suspicious swellings near the soil line or on the roots. Be especially careful when purchasing grafted plants.
2. All infected plants should be burned.

Other Ornamental Plants Affected By Crown Gall