Pheromon beim Kiefern‐Borkenkäfer “Waldgärtner”, Myelophilus piniperda L. (Coleopt., Scolytidae)

A new pheromon excreted by the Pine‐bark beetle, Myelophilus piniperda L. (Col., Scolytidae). Experiments by help of olfactometres showed the females of M. piniperda excreting a pheromon which attracts males and females of the species. The effect of this pheromon is intensified by odorous substances excreted by the pine bark. The females of M. piniperda produce the hole of entrance and following the mating room in the bark. Then they send out their pheromon. Some species of predators (Glischrochilus quadripustulatus L., Thanasimus formicarius L. a.o.) are attracted by the pheromon too.