Hairy root—Agrobacterium rhizogenes
The hairy root bacterium causes many small rootlets to form on swollen root tips. Plants may become stunted
and discolor. They eventually may die.
Solutions
Purchase and plant only high-quality nursery stock. Avoid injuring trees during transplanting. Soil
solarization during the hot dry season before planting may reduce hairy root bacteria in the soil. | 
Base
of root swollen with hairy root
Stunted
and swollen root tips
|
