Pest description and damage Whitefly occasionally develop large populations on ceanothus yet damage is surprisingly insignificant. When the whitefly numbers build it is often on the south side of plants. Depending on conditions the population may crash without intervention.
For biology, life history, monitoring and management
See "Whitefly" in:
For more information
Flint, M.L. 2015 rev. Whiteflies. http://ipm.ucanr.edu/PMG/PESTNOTES/pn7401.html