Citrus and Asian longhorn beetles
Citrus longhorn beetle, Anoplophora chinensis, and Asian longhorn beetle, A. glabripennis, are non-native wood-boring insects that can cause serious damage to a wide range of broad-leaved trees and shrubs. These beetles are not established in Britain and are quarantine organisms in the European Union. Any sightings should be reported via Tree Alert.
Scientific names Anoplophora chinensis; A. glabripennis
Plants affected Acer spp, birch, hazel, citrus, apple and many other deciduous trees and shrubs
Main symptoms Large (6-11mm diameter) exit holes in the branches, trunk, stem base and exposed roots
Most active Adult beetles: July-August. Larvae: all year round
Defra factsheet on Citrus longhorn beetle
Factsheet on differentiating Anoplophora longhorn beetle damage from that of native wood-boring insects invasive non-native species
Recording Invasive Species Count (RISC) survey
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.