Page 12 - AG 7-2011 Revised 2016
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Ash Whitefly Adults & Eggs Greenhouse Whitefly
Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR
Ash Whitefly Infestation Greenhouse Whitefly
on Raywood Ash
Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR
Many different species of whitefly exist in Southern California but their life-cycles are very
similar. Another recent variety to arrive in California was the Ash Whitefly, which came from
Mediterranean areas in 1988. It infests many fruit trees, has spread rapidly, and resists efforts
at control and eradication.
The Woolly Whitefly attacks primarily citrus trees, leaving fluffy masses of white waxy material
on the underside of leaves. It also produces honeydew which promotes the growth of black
sooty mold.
The Greenhouse Whitefly also infests citrus and many potted plants. It leaves a fine filament
of white strands on the underside of leaves instead of a waxy substance.
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