Parasitic Hymenoptera associated with <i>Thecodiplosis brachyntera</i> (Diptera: Cecidomyiidae) on the genus <i>Pinus</i> (Pinaceae) in the Czech Republic
2008
Skuhravý, V. | Thuróczy, C.
<i>Aprostocetus micantulus</i> (Thomson, 1878) (Chalcidoidea: Eulophidae), <i>Torymus heyeri</i> Wachtl, 1833 (Chalcidoidea: Torymidae), <i>Pseudencyrtus idmon</i> (Walker, 1848) (Chalcidoidea: Encyrtidae) and <i>Platy-gaster compressicornis</i> (Thomson, 1859) (Platygasteroidea: Platygasteridae) are four main parasitoids reared from galls of <i>Thecodiplosis brachyntera</i> (Schwägrichen, 1835) (Diptera: Cecidomyiidae) developing on <i>Pinus mugo</i> L., <i>P. rotundata</i> Link, <i>P. sylvestris</i> L. and <i>P.</i> × <i>pseudopumilio</i> (Willk.) G. Beck (Pinaceae) in the Czech Republic during outbreak 1967–1972. Of total 4,279 parasitoid specimens, <i>Platygaster compressicornis</i> (1,778 specimens, 41%) was the most abundant, <i>Aprostocetus micantulus</i> (1,047 specimens, 25%) and <i>Pseudencyrtus idmon</i> (1,020 specimens, 24%) less abundant and <i>Torymus heyeri</i> (434 specimens, 10%) was on the fourth place of abundance. In laboratory conditions, adults of <i>Platygaster compressicornis</i> emerged simultaneously with adults of <i>T. brachyntera</i>, adults of <i>Pseudencyrtus idmon</i> and <i>Torymus heyeri</i> 14–24 days after emergence of <i>T. brachyntera</i> and adults of <i>Aprostocetus micantulus</i> after 24–60 days. Behaviour of adult parasitoid during the process of building the opening hole to escape from gall is described. Larvae identified and figured by FANKHÄNEL and ZELETZKI (1964) as larval stage of <i>Misocyclops pini</i> are misidentification; in reality they are the salivary glands of larvae of <i>Thecodiplosis brachyntera</i>.
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