1. The Asian longhorned beetle: a threat to the European forests?
Bibliographic research
Mathilde Leroy

2. The Asian longhorned beetle (Anoplophora glabripennis)
Other names: Starry sky
Sky beetle
ALB
Area of origin: Eastern Asia
Host: different deciduous species
One of the most dangerous plant bugs in the world !
An Asian longhorned beetle
Photo: Doris Hölling (WSL)

3. Aspect Between 20 and 37 mm long
Antennae particularly long, and black with grey-light blue ribs
Black shining elytra punctuated of 10 to 20 white-yellow spots
The adult
Photo courtesy of Michael Bohne

4. Aspect The nymph The eggs The larva cream coloured elongated flattened
Photo courtesy of Pennsylvania Department of Conservation and Natural
The eggs
Photo USDA Forest Service
The larva
Photo: Beat Wermelinger (WSL)
cream coloured
elongated
flattened
between 5 and 7 mm long
legless
cream coloured
black head
from 1 cm to 5 cm long
cream coloured
3 cm long
1 cm wide

5. Biology Eat bark Penetration into the wood and dig galleries
From 1 to 2 weeks
Between 30 and 60 eggs under the bark
From 2
to 3 weeks
Lives in the wood 1 or 2 weeks
before to fly
At the end of the gallery
Life cycle
Picture: Michael Bohne, USDA

6. Introduction in Europe
Eggs
Picture: Michael Bohne, USDA
Wood packaging material
Photo: Scierie Amphilac
Larva
Photo: Michael Bohne
1996: First infestation, in United States
2001: First infestation in Europe, Austria

7. Disruption of the sap circulation
Hosts
Deciduous trees
Trunk diameter > 3 cm
Healthy trees
Large range of species
Birch
Photo: Jord Gubbe
Poplar
Photo: László Szalai
Damage
Larvae eat the wood
Vessels are damaged
Disruption of the sap circulation
The tree dies
Maple
Photo: Deb Knecht
Holes = portals of entry

8. 1 cm diameter orifice in the trunk Sawdust at the axil branch
Symptoms
1 cm diameter orifice in the trunk
Photo: Doris Hölling (WSL)
Sawdust at the axil branch
Photo: Michael Bohne, USDA
Declining branches
Photo: D. Cappaert
Larva in the wood
Photo: M.J. Raupp

9. Visual surveillance (climber arborists) Assistance by trained dogs
Observations
Visual surveillance (climber arborists)
Photo : Radio-Canada
Assistance by trained dogs
Photo: Monika Hagemeier
Eradication
 Felling and destruction of infested trees and surrounding trees
Use of pheromone traps
Photo: Pavuk D.M.

10. What is the risk for european forests?
An infestation in United-tates in a forest similar to European forest
European forests
Photo: Umberto Salvagnin
The Asian longhorned beetle
Photo: Kyle Ramirez
Elements in favor of the development of Asian longhornet beetle:
- European climatic conditions
- European forest species
High damage potential of the Asian longhornet beetle:
Infestation of healthy tree
Large range of species
Forest in danger
- Forest ecosystem affected - Forest sector in crisis
Trade of wood in decline - Social problems

11. Don’t import the insect
Conclusion
European forests: environment conducive to the infestation by the Asian longhorned beetle
Reactivity
Don’t import the insect
Vigilance
ERADICATION
Photo: WBZ-TV