Multi-toothed pine bark beetle
| Multi-toothed pine bark beetle | ||||||||||||
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Many-toothed pine bark beetle ( Orthotomicus laricis ) |
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| Scientific name | ||||||||||||
| Orthotomicus laricis | ||||||||||||
| ( Fabricius , 1792) |
The multi-toothed pine bark beetle ( Orthotomicus laricis ) 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. In the species, there are no mass reproductions with subsequent damage in the coniferous forest.
features
The beetles are 2.5 to 4 millimeters long and have a red-brown colored, cylindrical body. The pronotum covered viewed from above, not the head. The forehead is sparse and has short hairs. The wing covers have two types of rows of dots made up of small depressions. Regular rows of dots alternate with rows that carry fine, widely distributed dots. The tip edge of the elytra is curved, finely notched and not bordered on the inside. The fall of the wing covers is almost vertical, the surface of the fall is round in plan view. The sutural teeth are as far apart from each other as they are from the nearest conical tooth. The antennae and legs are yellow-brown, the antennae sutures straight. The fly-wing cover has strong conical teeth in the male and less developed in the female.
distribution
The species is common in Europe.
Way of life
The multi-toothed pine bark beetle is a polygamous bark breeder on conifers. It is found mainly on the common pine ( Pinus sylvestris ), occasionally also on the Weymouth pine ( Pinus strobus ), Aleppo pine ( Pinus halepensis ), European larch ( Larix decidua ), silver fir ( Abies alba ) and Norway spruce ( Picea abies ) . It also colonizes the bark of the trees in the area of the bark . The eggs are laid in heaps, up to 50 pieces together. The feeding picture is a corridor from which irregular larval corridors emanate. Two generations are trained per year, the flight time is in May and 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, 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
http://www.forestryimages.org/search/action.cfm?q=Orthotomicus%20laricis&Start=1&results=19