Grained spruce bark beetle
| Grained spruce bark beetle | ||||||||||||
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_Syn.-_Trypophloeus_asperatus_Gyllenhal,_1813;_Cryphalus_asperatus_(Gyllenhal,_1813);_Cryphalus_abietis_(Gyllenhal,_1813)_(15336255321).png)
Grained spruce bark beetle ( Cryphalus abietis ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Cryphalus abietis | ||||||||||||
| ( Ratzeburg , 1837) |
The grained spruce bark beetle ( Cryphalus abietis ) is a weevil from the subfamily of the bark beetle (Scolytinae). Since it creates its breeding systems in the bark of the host trees, it is counted among the bark breeders.
features
The beetles are 1.2 to 1.7 millimeters long and have a cylindrical body. The front provided with fine bumps pronotum is eponymous for the type. It obscured when viewed from above the head, its front edge is in the middle with no outstanding hump. The dark brown-black colored, matt wing covers have fine scales. The antennae and legs are yellow. The antennae flagella is four-parted, the antennae lobe has three seams and is without incision.
distribution
The species is widespread in Central and Eastern Europe, Scandinavia and the European part of Russia.
Way of life
The grained spruce bark beetle occurs mainly in spruces , preferably the common spruce ( Picea abies ), but also the Siberian spruce ( Picea obovata ) and the Caucasus spruce ( Picea orientalis ). He also uses firs ( Abies ) and pines ( Pinus ) and occasionally occurs on Douglas firs ( Pseudotsuga menziesii ) and Lawson's false cypresses ( Chamaecyparis lawsoniana ) as well as larches ( Larix ). It prefers to colonize thin-bark parts of the trees and especially branches or whorls. Normally it is active as an insignificant colonist of weakened branches, twigs and brush scraps as well as weaker stems (poles). The feeding picture is a square-shaped mother duct from which closely spaced, winding, two to four centimeters long larval ducts emanate. They like to start at the branches of the shoots, but also reach out to the shoots themselves. There is often an education of two generations. The flight times are in March and July / August.
literature
- Fritz Schwerdtfeger : The forest diseases. Textbook of forest pathology and forest protection . 4th, revised edition. Parey, Hamburg and Berlin 1981, ISBN 3-490-09116-7
- Sabine Green : Manual for the determination of the European bark beetle Verlag M. & H. Schaper, Hanover 1979, ISBN 3-7944-0103-4
- Edmund Reitter : Fauna Germanica - The beetles of the German Empire. Volume 5 p. 288, KG Lutz, Stuttgart 1916
- Edmund Reitter: Fauna Germanica - The beetles of the German Empire. 5 volumes, Stuttgart KG Lutz 1908–1916, digital library volume 134, Directmedia Publishing GmbH, Berlin 2006, ISBN 3-89853-534-7
Web links
- Cryphalus abietis in Fauna Europaea