If you find galls on your plants, don't despair. At the worst, gall infection will cause stunted plant growth, poor fruit development, and reduced nutrient and water uptake. Often, the top the the plant will appear normal.

Root galls are hardest to detect and sometimes go unnoticed until a seemingly unresponsive plant is dug for transplant or removed. Prune away the gall and that portion of the root to which it is attached. Dip the cut into a solution of Agrobacterium radiobacter strain 84 (commonly sold as Galltrol-A or NOGALL) to prevent reinfection.

Crown galls are hardest to remove. They frequently form on the grafting union of modern hybrid roses. Prune away the infected area to the best of your ability, and spray on a solution of A. radiobacter to prevent reinfection.

Stem galls are the easiest to notice and remove. Prune away infected stems and canes and spray with A. radiobacter to prevent reinfection.

Note: A. radiobacter will not eliminate existing galls. It is a naturally occurring biological control bacterium - the natural counterpart - to A. tumefaciens and A. rubi.

If planting or replanting in the infested or potentially infested soil, spray the plant's roots and stems in a solution of A. radiobacter to prevent infection. I perfer to dig out the old soil and replace with new uninfected soil.
By Mark Whitelaw, Kindly Provided by Laura Whitelaw