Pest description and damage Whitefly species occasionally develop large populations on ceanothus, yet damage is surprisingly insignificant. As the name implies, adult whiteflies are tiny white flies about 0.05 inch in length and often take flight from host when approached. 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:
See Table 1 in:
Chemical Control of Landscape Pests
For more information
Flint, M.L. 2015 rev. Whiteflies. http://ipm.ucanr.edu/PMG/PESTNOTES/pn7401.html