Ips acuminatus

It lives under thin bark of pine treetops and branches. It swarms in May-July. Larvae feed not only on phloem, but also on the mycelium of ambrosial fungi. The nuptial chamber passes deep into the sapwood surface from which branch off 3-5 relatively straight or only slightly curved maternal galleries. The length of feeding is 20-40 cm, its width reaches 2 mm. The tunnels engraved by females are fully obstructed by wooden debris, which makes the species unique among the rest of the genus members. Larval galleries are relatively sparse and short. The engraver beetle pupates in chambers engraved deeply into sapwood. These are visible even on several years old trunks. Very dangerous and on many places numerous species. I can couse die back on large areas of pine forests.