Die blaue HolzwespeSirex cyaneus F. (Hym., Siricidae) und der TannendüsterkäferSerropalpus barbatus Schall. (Coleoptera, Serropalpidae) als technische Holzschädlinge an Tannen in Südtirol

@article{Hellrigl2005DieBH,
  title={Die blaue HolzwespeSirex cyaneus F. (Hym., Siricidae) und der Tannend{\"u}sterk{\"a}ferSerropalpus barbatus Schall. (Coleoptera, Serropalpidae) als technische Holzsch{\"a}dlinge an Tannen in S{\"u}dtirol},
  author={Klaus G. Hellrigl},
  journal={Anzeiger f{\"u}r Sch{\"a}dlingskunde, Pflanzenschutz, Umweltschutz},
  year={2005},
  volume={57},
  pages={33-35}
}
  • K. Hellrigl
  • Published 1 February 1984
  • Biology
  • Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz
In the summer of 1983 dead firs were found near Kaltern, South Tyrol, Italy attacked heavily bySirex cyaneus (60%) andSerropalpus barbatus (40%). The slipping holes of both species were identical. The numerous relation between females and males ofS. cynaea was 1∶10. About 26% of this species were parasitized byIbalia leucospoides Hoch. (Cynip., Ibaliidae).Sirex cyaneus andSerropalpus barbatus must be considered as important wood destroyers of silver firs.ZusammenfassungIm Sommer 1983 wurden bei… 
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References

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Studies in Siricidae, especially of Europe and southern Asia (Hymenoptera, Symphyta)
TLDR
Two ratios are introduced as useful characters for separating species : the ovipositor/forewing ratio and the sawsheath/ovipositors ratio, which were found not to vary with the size of the insects.
Imenotteri sinfiti di Habitat forestall e montani del Frlull
  • Redia
  • 1978