Xylotrechus chinensis
Tiger longicorn beetle
Xylotrechus chinensis is an invasive longhorn beetle native to East Asia (China, Korea, Japan, Taiwan). It has become established in parts of southern Europe, including Spain, France, and Greece. Larvae develop in the wood of living or recently pruned trees, especially Morus alba, but also occasionally apple, pear, and grapevine. Adults are active from June to August. The larvae tunnel through the heartwood, causing sap flow, bark splitting, branch dieback, and tree death. Infested trees often show numerous emergence holes. Due to its ability to attack apparently healthy trees, the species poses a serious threat to ornamental and urban trees, and it is monitored as a quarantine pest.
Circular emergence holes (5–6 mm), sap exudation, bark cracks, frass deposits, and dieback of branches and whole trees.
Tree Species: Pear, Apple Tree, Mulberry, Grape
Part of a plant- attacked: Tree trunk, Branch
Pest significance: Very harmful
Pest Category: Insects
Invasive Species: Yes
Present in EU: Yes
Pest group: Insect
Affected part of wood: Heartwood, Sapwood
Depth of damages: Bark, More than 5 cm depth
The extent of damage: Whole trunk
Prevalence in Europe: Rare
Damaged products: Firewood, Fresh timber logs (water still in the sapwood), Furniture, Lumber, boards and prisms, Wooden house constructions
Roundwood size: Branches and twigs, Diameter 50+, Diameter from 10 up to 50 cm, Diameter up to 10 cm
Wood discoloration: No
Exit holes: Round
Pest subcategory: Wood-boring insect
Similar pests
Cerambyx cerdo
Ergates faber
