citrus longhorned beetle
Anoplophora chinensis (Forster, 1771)
- Anoplophora chinensis, citrus longhorned beetle, is native to Asia and occurs primarily in China, Korea, and Japan.
- Life Cycle
- Larvae are white, opaque, legless grubs typical of longhorned beetles. When mature, they are 1.75-2.3 in. (4.4-5.8 cm) long and about 0.3 in. (0.8 cm) wide with an amber colored head and black mouthparts. Adults emerge from April to August. Adults are 1–1.5 in. (2.5-3.8 cm) long and shiny black with white markings. Antennae are at least as long as the body and have alternating black and white bands. The ventral surface is pubescent. The color of the pubescence varies from white to blue depending on location. An important identifying characteristic of Anoplophora chinensis is the presence of two pairs of polished white bumps at the base of the elytra. These are visible with a 10x hand lens and are not present on the Asian longhorn beetle, Anoplophora glabripennis. Damage includes distinct round or slightly oval shaped adult exit holes on the bark surface, T-shaped oviposition holes, sawdust-like frass or wood pulp around small holes, and larval tunnels in the wood under loose or thin bark.
- It has been found in, and eradicated from, Georgia, Wisconsin, and Washington. It was most likely introduced on wood packing material or in live plant material. It is known to attack and kill more than 100 species of plants and includes several species in the Citrus genus as well as peach, cherry, pecan, maple, oak, ash, elm, and walnut.
- Control Efforts
- Good sanitation such as burning or chipping infested plant parts, is always a good practice that can reduce populations of immature stages. The use of wire netting or spiral guards at the trunk base can serve as a physical barrier for oviposition. Remember that any suspect Anoplophora species may be a regulatory, actionable pest in the U.S. Contact your local state department of agriculture  for further information or questions regarding the status of this pest in your state. You should not attempt to control, manage, discard potentially infested wood material, or transport living plant material that you suspect may contain a regulatory pest.
Identification, Biology, Control and Management Resources
Exotic Forest Pest Information System For North America
- Florida Department of Agriculture and Consumer Services, Division of Plant Industry and University of Florida