Shaggy spruce bark beetle
| Shaggy spruce bark beetle | ||||||||||||
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Shaggy spruce bark beetle ( Dryocoetes autographus ) |
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| Dryocoetes autographus | ||||||||||||
| ( Ratzeburg , 1837) |
The shaggy spruce bark beetle ( Dryocoetes autographus ) 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 3 to 4.3 millimeters long and have a dark-brown to red-brown, closely spaced hairy body. The head is not visible from above. The eyes are kidney-shaped. The throat plate is uniform curved, uniform structure, with front reibeisenartiger structure and dotted rear. Seen from above, it covers the head. The wing covers , which are provided with clear rows of dots, merge into a rounded drop. The spaces between the rows of dots are finely dotted and covered with rows of long, yellow, protruding hair. The antenna lobe is provided with two seams and flattened, the antenna whip is five-part. The third foot member is cylindrical in shape.
distribution
The species is common in Europe .
Way of life
Dryocoetes autographus occurs on spruce ( Picea ), pine ( Pinus ), more rarely on silver fir ( Abies alba ) and European larch ( Larix decidua ). The feeding picture is confused. Short, irregular, curved, spur-shaped, sometimes widened mother tunnels and tangled, winding larval tunnels ensure that no clear feeding pattern can be seen. There are one or two generations a year with flight times in May and July. The animals live monogamous .
The beetles are strongly secondary, which means that weakened or damaged host plants, as are often found after litter and break events, are almost exclusively colonized. Similar to the spruce weevil ( Hylobius abietis ) or the black pine bast beetle ( Hylastes ater ), the beetles can cause bark injuries by gnawing young forest trees . In coniferous forest plantings, these can cause economic damage (death of the young plants).
Systematics
Synonyms
The following synonyms are known from the literature for Dryocoetes autographus :
- Bostrichus autographus Ratzeburg, 1837
- Bostrichus septentrionis Mannerheim, 1843
- Bostrichus semicastaneus Mannerheim, 1852
- Bostrichus victoris Mulsant & Rey , 1853
- Dryocoetes hectographus Reitter, 1913
- Dryocoetes americanus Hopkins, 1915
- Dryocoetes pseudotsugae Swaine, 1915
- Dryocoetes suecicus Eggers, 1923
- Dryocoetes artepunctatus Eggers, 1941
- Dryocoetes polonicus Karpinski, 1948
- Dryocoetes sachalinensis Sokanovskiy, 1960
- villosus auct.
swell
Individual evidence
- ↑ Dryocoetes autographus Ratzeburg, 1813. Fauna Europaea, Version 1.3, April 19, 2007 , accessed on October 15, 2008 .
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 Grüne : Handbook for the determination of the European bark beetles . M. & H. Schaper Verlag, Hannover 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
