Make the cut below the swelling on the cane to be sure you remove the borer. To prevent borers from entering canes, apply shellac or white glue to the exposed tips after pruning. Overnight roses are chewed and trampled. Buds and blooms are damaged the most. The growths are light green when young and turn brown and woody as they age.
Plant growth is stunted, foliage is abnormally small and few buds are produced.
Crown gall, a disease caused by bacteria that live in the soil. The bacteria enter a plant through the roots or through wounds at the root area. The bacteria cause abnormal cell growth, which produces the galls. There are no chemical controls for crown gall. Small galls may be pruned out with a sharp knife or pruning shears.