What is an Azalea Sawfly?

Identification

• There are two types of sawflies referred to as azalea sawflies. The Nematus lipovskyi and the Amauronematus azaleae are both considered azalea sawflies. In the larval stage, sawflies resemble moth caterpillars. Adult sawflies are similar to wasps, with 2 pairs of wings and measure 1/2 inch or less. Azalea sawflies most commonly feed on azalea in the spring months.

Effects

• Azalea sawflies feed on the leaves of healthy azaleas. Infestations often completely defoliate entire plants. While they can cause significant damage to azaleas, most single sawfly attacks do not cause the death of the plant. Heavy or repeated defoliation from sawflies can increase the risk of injury from weather conditions, drought, other insects and diseases.

Signs of Infestation

• Azalea sawflies are often difficult to spot because they are green in color in the larval stage, blending in with the foliage on the azalea. One sign your azalea is infested with azalea sawflies is the presence of star-shaped rosettes on remaining portions of leaves. These unusual shapes are usually present on the stem-like veins of azalea leaves.

Control

• Azalea sawflies are susceptible to control by natural enemies such as beetles, parasitic wasps and insect eating birds. Many diseases and viruses also help control sawflies. Insecticides are also available to control sawflies. Many of these products are labeled for use on caterpillars. Contact your local extension office or local gardening center for advice on which products work best on azalea sawflies.