Whitefly adult and nymphs
© 2000. Ralph E. Berry, Department of Entomology, Oregon State Univiversity, Corvallis, Oregon.
| Whitefly adults (Homoptera: Aleyrodidae) are about 1 to 3 mm long, white, with four wings, and covered with powdery white waxy material. Nymphs are flat and oval and appear glued to the lower leaf surface. Nymphs also are covered with a powdery white, wax-like material. The injury caused by adults and nymphs is similar to that caused by aphids in that whiteflies suck plant juices and excrete honeydew that gives the plant a sticky appearance. Feeding injury causes stunting, distorted leaves, and weak appearing plants. Whiteflies seldom require control in potatoes in the northwest. |
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