Offspring per emergence hole at different attack densities in the Spruce Bark Beetle, Ips typographus (L.) (Coleoptera, Scolytidae)
Field and laboratory data from the spruce bark beetle, Ips typographus, showed that increased offspring production per unit bark area increased the average number that emerged per emergence hole. In the laboratory this offspring per hole ratio was investigated at different attack densities. Zahl der schlüpfenden Käfer pro Schlupfloch bei verschieden starkem Befall des Buchdruckers, Ips typographus