Pepper, Eggplant: Whitefly
Photo by: R.D. Akre
Biology
Whiteflies are common pests in the greenhouse and garden. The adult whitefly is a tiny (1/10″ or less), white, moth-like insect. They typically feed on the underside of leaves, flying up in clouds when disturbed. The immature whiteflies (nymphs) are also found on the underside of leaves, and are oval, flat, and variously-colored. Whiteflies feed by sucking sap from plant tissues. Damaged leaves wilt, turn yellow or brown, and may drop. Plants may be stunted by severe infestations. Whiteflies also produce honeydew, a sweet, sticky material which may attract ants or become covered with growth of dark sooty mold.
Management Options
See "Using Integrated Pest Management (IPM) in the Landscape" for successful problem management techniques.
Non-chemical Management
Select non-chemical management options as your first choice!
- Inspect new plants thoroughly before planting. New plants often introduce whiteflies.
- Natural enemies such as ladybird beetles, spiders, and parasitic wasps help control whitefly populations. Avoid use of broad-spectrum insecticides which kill beneficials.
Chemical Management
IMPORTANT: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
- Apply according to label instructions when whitefly is first seen.
Approved Pesticides
If you choose to use a pesticide, some examples of products that are legal in Washington are listed below. Some products are labeled for just INDOOR or just OUTDOOR use, or may allow both uses. Be sure to choose a product appropriate for your situation. Always read and follow all label directions.
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.