Citrus Longhorn Beetle

Taxonomy

Anoplophora chinensis

Abbreviation: CLB

Distribution

Citrus longhorn beetle is present in: China, Japan, Korea, Indonesia, Macau, Malaysia, Myanmar, the Philippines, Taiwan, and Vietnam.

Affected Commodities

Citrus longhorn beetle is a pest of the following plants: woody plant material, including ornamentals, fruit trees, and bonsai. Major hosts include:

Citrus hosts:

  • Citrus limonia
  • king Mandarin, Citrus nobilis
  • pummelo, Citrus maxima
  • sour orange, Citrus aurantium
  • sweet orange, Citrus sinensis

Non-citrus hosts:

  • Acacia spp.
  • alder, Alnus spp.
  • apple, Malus spp.
  • Aralia spp.
  • ash, Fraxinus spp.
  • Atalantia spp.
  • avocado, Persea spp.
  • birch, Betula spp.
  • Camellia spp.
  • Carya spp.
  • chestnut, Castanea spp.
  • Cotoneaster spp.
  • crepe myrtle, Lagerstroemia spp.
  • elm, Ulmus spp.
  • Fagus spp.
  • Ficus spp.
  • guava, Psidium spp.
  • hawthorn, Crateaegus spp.
  • Hibiscus spp.
  • holly, Illex ssp.
  • hornbeam, Carpinus spp.
  • horse-chestnut, Aesculus spp.
  • ivy, Hedera spp.
  • Japanese cedar, Cryptomeria spp.
  • jujube, Ziziphus spp.
  • kumquat, Fortunella spp.
  • Lindera spp.
  • lychee, Litchi spp.
  • loquat, Eriobotrya spp.
  • locust, Robinia spp.
  • maple, Acer spp.
  • mountain ash, Sorbus spp.
  • mulberry, Morus spp.
  • oak, Quercus spp.
  • paper mulberry, Broussonetia spp.
  • pear, Pyrus spp.
  • pigeon pea, Cajanus spp.
  • pine, Pinus spp.
  • poplar, Populus spp.
  • Rosa spp.
  • Rubus spp.
  • silky oak, Grevillea spp.
  • snowbell, Styrax spp.
  • sycamore, Platanus spp.
  • stone fruit, Prunus spp.
  • sumac, Rhus spp.
  • walnut, Juglans spp.
  • willow, Salix spp.

Commodity Damage

Evidence of citrus longhorn beetle damage includes: yellowing or drooping of leaves, bore holes.

The insect can arrive on woody plants. It was discovered in Tukwila, Washington in 2001 on a Japanese maple bonsai imported from Korea. Wood packing material may provide a means of dispersal.

Adult citrus longhorn beetles have a length around 2–4 cm or approximate to the diameter of the U.S. half dollar.

Larval citrus longhorn beetles are approx. 5 cm long.

Port Inspections

CBP Agriculture Specialists, please refer to manuals for general inspection guidelines.

Citrus longhorn beetle can be moved through the international trade of woody plants and woody plant materials. The pest is often found in the egg, pupae, and larval stage. Adults have also been intercepted on ornamentals and bonsai trees entering the U.S.

For additional information (external):

 Citrus longhorned beetle larva; photo by National Plant Protection Organization, the Netherlands, Bugwood.org

Citrus longhorned beetle larva; photo by National Plant Protection Organization, the Netherlands, Bugwood.org

 Citrus longhorned beetle adult; photo by Art Wagner, USDA - APHIS, Bugwood.org

Citrus longhorned beetle adult; photo by Art Wagner, USDA - APHIS, Bugwood.org

 Citrus longhorned beetle adult; photo by Art Wagner, USDA - APHIS, Bugwood.org

Citrus longhorned beetle adult; photo by Art Wagner, USDA - APHIS, Bugwood.org

 Citrus long-horned beetle damage; photo by National Plant Protection Organization, the Netherlands, Bugwood.org

Citrus long-horned beetle damage; photo by National Plant Protection Organization, the Netherlands, Bugwood.org

 Citrus long-horned beetle damage; photo by National Plant Protection Organization, the Netherlands, Bugwood.org

Citrus long-horned beetle damage; photo by National Plant Protection Organization, the Netherlands, Bugwood.org

 Citrus longhorned beetle adult, dorsal view; photo by Pest and Diseases Image Library, Bugwood.org

Citrus longhorned beetle adult, dorsal view; photo by Pest and Diseases Image Library, Bugwood.org

 Citrus longhorned beetle adult, dorsal view; photo by Pest and Diseases Image Library, Bugwood.org

Citrus longhorned beetle adult, dorsal view; photo by Pest and Diseases Image Library, Bugwood.org

 Citrus long-horned beetle antennae have 11 segments, each with a white blue base; photo by Pest and Diseases Image Library, Bugwood.org

Citrus long-horned beetle antennae have 11 segments, each with a white blue base; photo by Pest and Diseases Image Library, Bugwood.org

 Citrus longhorned beetleadult, ventral view; photo by Pest and Diseases Image Library, Bugwood.org

Citrus longhorned beetleadult, ventral view; photo by Pest and Diseases Image Library, Bugwood.org

 Citrus longhorned beetle adult elytra; photo by Pest and Diseases Image Library, Bugwood.org

Citrus longhorned beetle adult elytra; photo by Pest and Diseases Image Library, Bugwood.org

 Citrus longhorned beetle adult, lateral view; photo by Pest and Diseases Image Library, Bugwood.org

Citrus longhorned beetle adult, lateral view; photo by Pest and Diseases Image Library, Bugwood.org

 Citrus longhorned beetle damage on a bonzai maple; photo by Art Wagner, USDA-APHIS, Bugwood.org

Citrus longhorned beetle damage on a bonzai maple; photo by Art Wagner, USDA-APHIS, Bugwood.org