Résumé
Des dépérissements ont été observés sur de jeunes chênes sessiles (Quercus petraea) plantés en alignement le long des routes dans le canton de Genève. Les insectes de la sous-famille des Scolytinae (Coleoptera, Curculionidae), présents sur des arbres affaiblis, peuvent être associés à des symptômes de dépérissement. Afin d'identifier les espèces potentiellement' impliquées, des piégeages ont été réalisés en 2006 et 2010 dans 13 communes genevoises. Durant ces deux campagnes de piégeage, dix espèces de Scolytinae, appartenant à sept genres, ont pu être identifiées. Scolytus intricatus et Anisandrus dispar ont été les deux principales espèces collectées.
Diebacks have been observed on young sessile oaks (Quercus petraea) in roadside plantations in the canton of Geneva. It is known that the insects, belonging to the sub-family of the Scolytinae (Coleoptera, Curculionidae), are often present on weakened trees and may be associated with tree dieback. In order to identify the species involved, insect trapping campaigns were carried out on the territory of 13 municipalities in 2006 and 2010. It allowed for the identification of ten species of Scolytinae belonging to seven genera. Scolytus intricatus and Anisandrus dispar were the two most frequent collected species.
Diebacks have been observed on young sessile oaks (Quercus petraea) in roadside plantations in the canton of Geneva. It is known that the insects, belonging to the sub-family of the Scolytinae (Coleoptera, Curculionidae), are often present on weakened trees and may be associated with tree dieback. In order to identify the species involved, insect trapping campaigns were carried out on the territory of 13 municipalities in 2006 and 2010. It allowed for the identification of ten species of Scolytinae belonging to seven genera. Scolytus intricatus and Anisandrus dispar were the two most frequent collected species.