- These very small (1/16- to 1/8-inch) white fly-like insects differ from flies by have four wings instead of two.
- The oval immobile nymphal stage is easier to use for identification:
◦ Azalea whitefly – yellowish green.
◦ Maple whitefly – pale yellow with gray bands.
◦ Mullberry whitefly – black with a white fringe.
Biology and Habits:
- Females lay up to 100 eggs on the underside of the leaves.
- The larvae attach to the leaf feeding on plant juices with their mouthparts as they mature over the next 30 days.
- The adults are active fliers and also feed on the underside of the plant leaves. They can live for more than a month.
- Mature nymphs overwinter on the leaves.
- There are several generations per year.
- Azalea whitefly – azaleas.
- Maple whitefly – maples.
- Mullberry whitefly – holly, magnolia, maple, mountain laurel, and mullberry.
- As whiteflies feed on plant juices they secrete a sugary substance (honeydew) that, as it ages, produces a black sooty mold.
- Damaged leaves first curl at the edges and turn yellow; heavily damaged leaves fall off.