Whiteflies
Published 9/02
In this Guideline:
Identification and life cycle
Damage
Management
About Pest Notes
Publication
Glossary
Whiteflies are tiny, sap-sucking insects that are frequently abundant in vegetable and ornamental plantings. They excrete sticky honeydew and cause yellowing or death of leaves. Outbreaks often occur when the natural biological control is disrupted. Management is difficult.
IDENTIFICATION AND LIFE CYCLE
Whiteflies usually occur in groups on the undersides of leaves. They derive their name from the mealy, white wax covering the adult’s wings and body. Adults are tiny insects with yellowish bodies and whitish wings. Although adults of some species have distinctive wing markings, many species are most readily distinguished in the last nymphal (immature) stage, which is wingless (Table 1).
Statewide IPM Program, Agriculture and Natural Resources, University of California
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