How to Manage Pests

Pests in Gardens and Landscapes

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
Base of root swollen with hairy root

Stunted and swollen root tips
Stunted and swollen root tips


Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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