Open Access<i>Trichiosoma nanae</i> sp. n., a monophag on <i>Betula nana</i> from Finland (Hymenoptera, Cimbicidae)
Author(s) -
Veli Vikberg,
M. Viitasaari
Publication year - 1991
Publication title -
entomologica fennica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.173
H-Index - 21
eISSN - 2489-4966
pISSN - 0785-8760
DOI - 10.33338/ef.83537
Subject(s) - ichneumonidae , hymenoptera , biology , botany , host (biology) , zoology , ecology , parasitoid
Trichiosoma nanae sp. n. is described from Finland. The species occurs in pine bogs, where the host plant of the larva, Betula nana Linnaeus grows. Records are given on its distribution in Finland. The thin cocoons, usually situated near the apex of twigs of the host plant, are frequently attacked by birds. Eight species of Ichneumonidae and one species of Torymidae (Hymenoptera) have been reared from cocoons, of which about 30 percent are parasitized. The three most common parasitoids are Agrothereutes mandator (Linnaeus), Rhorus mesoxanthus (Gravenhorst) and Protarchus testatorius (Thunberg).