Common engraver [1] , or chalcograph ( Pityogenes chalcographus ) - a beetle from the subfamily of bark beetles ( Scolytinae ), widespread in Western Europe and Siberia .
| Common engraver |
male (left) and female |
| Scientific classification |
|---|
| No rank : | Bilateral symmetrical |
| Subtype : | Tracheo-breathing |
| Infraclass : | Winged insects |
| Treasure : | Fully Transformed Insects |
| Superfamily : | Curculionoid |
|
| International scientific name |
|---|
Pityogenes chalcographus Linnaeus , 1761 |
| Synonyms |
|---|
Tomicus chalcographus |
|
The body is 1.5-2 mm long, cylindrical, black or brown in color, shiny, almost without hairs. Thoracic shield on both sides with transverse recess, with a smooth median line. Elytra smooth, almost without dots. At the posterior end of the elytra, a recess along the seam. On both sides of it, males have 3 sharp teeth, and females have 3 tubercles.
The beetle attacks young trees or the tops and branches of old trees, as it needs a thin bark. It is most often found on conifers , choosing healthy parts than the bark beetle typographer , which often attacks trees that were once hit by a chalcograph.
Its passages depart in the form of rays of 4-6 uterine passages that are imprinted on sapwood . Uterine passages go obliquely or horizontally and are relatively short compared, for example, with termite .
The most common measure to combat chalcographers is to lay out hunting trees - spruce trees with thin bark.
