Most Unwanted: Citrus Longhorn Beetle

ID tips for the Citrus Longhorn Beetle (Anoplophora chinensis)

Characteristics:

  • Adult Citrus Longhorn Beetles are black with variable white markings and are around 21-37 mm long
  • Antennae are longer than their bodies (between 1.2-2 times body length) and are black with white/light-blue bands
  • Larvae cause the most damage as they tunnel internally through lower trunks and roots
  • Adults exit through circular holes about 5-10 mm in diameter
  • Holes made by the Citrus Longhorn Beetle are usually found at the base of the trunk, near the roots. If they are further up, it is more likely to be the Asian Longhorn Beetle.

Plants affected:

  • It could infest a wide variety of species, especially Maple trees.

UK status and other information:

  • Not currently present in the UK
  • A few have reached the UK on trees imported from China, Japan and South Korea. So far they have been intercepted before escaping into the wider environment
  • They are an EU-listed quarantine pest.

Why will any findings be important?

  • If they became established, these beetles would be a major threat because they can infest a wide range of broadleaved trees
  • Tunnelling by larvae leaves the tree more susceptible to diseases and wind damage
  • If possible, the beetle should be caught and placed in a secure container such as a sealed glass jar so that an inspector can collect it. The beetles are not harmful to humans.

 Could be confused with:

Useful links:

 

 

Images all © Forestry Commission except Golden-bloomed Grey Longhorn Beetle by Dluogs on Flickr, CC BY-SA 2.0

 

Tags: