Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

A contribution to the knowledge of the hymenopterous parasites of certain injurious bark beetles.

Abstract

War conditions have led to the accumulation of much dead and dying timber in eastern Finland, which may encourage outbreaks of bark beetles. The author therefore investigated the extent to which these and other bark insects are parasitized in Pine and Spruce. The parasites bred were Ephialtes (Pimpla) terebrans, Tatz., from Pissodes validirostris, Sahlb., Coeloides abdominalis, Zett., from Myelophilus (Blastophagus) piniperda, L., Pissodes pini, L., P. harcyniae, Hbst., and Ips proximus, Eichh. ; C. melanotus, Wesm., and C. bostrychorum, Giraud, from P. pini; Allodorus semirugosus, Nees, from P. harcyniae; Eurytoma rufipes, Wlk., from M. piniperda and Hylastes (Hylurgops) palliatus, Gylh. ; E. curculionum, Mayr, from P. validirostris; E. ischioxanthus, Ratz., from Ips (Pityogenes) chalcographus, L., I. (P.) bidentatus, Hbst., and I. (P.) quadridens, Htg. ; E. nobbei, Mayr, from Magdalis uiolacea, L. ; Rhopalicus suspensus Ratz., from P. harcyniae, Myelophilus piniperda and I. typographus, L. ; R. (Pteromalus) azureus, Ratz., from I. proximus, I. (Pityogenes) bidentatus, and H. palliatus; and Rhoptrocerus (Pachyceras) xylophagorum, Ratz., from I. chalcographus, I. bidentatus and H. palliatus. KEYWORDS: Insect parasites \ Platypodidae \ Scolytidae \ bark beetles \ insect pests \ Picea abies insects \ Pinus sylvestris insects