How to spot the Asian Longhorn Beetle (Anoplophora glabripennis).
- Adult beetles are black, shiny, 20-35 mm long and 7-12 mm wide
- Each wing-case has about 20 distinctive, irregular, white spots
- Antennae are very long. They are black but each segment has a distinctive blue-grey or a creamy-white base
- Larvae cause the most damage as they tunnel internally through trunks and branches. Adults exit through circular holes on the trunk, around 10 mm in diameter
- If the holes are near the roots, it is more likely to be the Citrus Longhorn Beetle instead.
- They infest a wide variety of tree species, especially Poplar, Sycamore and Willow.
UK status and other information:
- Not yet present in the UK
- A major outbreak occurred in Kent in 2012, with 2,000 trees felled to eradicate the beetle. This outbreak was traced to wood packing imported from the Far East
- This beetle is a native of China and has caused extensive damage to trees in the USA and Italy since being accidentally introduced there in recent years.
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:
- The Citrus Longhorn Beetle, which is almost identical in appearance.
- There are also many native species of Longhorn Beetle. Learn more about Longhorn Beetles and explore pictures of a range of species.
- Read more on the Forestry Commission website.
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