Détail de la référence

Article

Zur Kenntnis der Parasiten des Tannentriebwicklers Choristoneura (Cacoecia) murinana HB. Teil I

Auteur : Zwölfer (Helmut)


Année de publication : 1956
Publication : Zeitschrift für Angewandte Entomologie
Volume : 39
Fascicule : 4
Pagination : 387-409


Résumé :

During collections of parasites of the European Fir Budworm Choristoneura murinana Hb., carried out in 1955 in the Vosges, 23 parasite species had been reared, 7 of them being first records for C. murinana Hb. The degree of larval parasitism varied in 1955 from 2–7%, while that of the pupal parasitization amounted from 29–55%. A synoptic list of all the records of parasites hitherto reared from C. murinana Hb. is given. A comparison of the own parasite list whith those published by other authors shows, that the parasite complexes observed in the Vosges and in the Black Forest, i. e. in the maritime climatic region of Europe exhibit relatively close relations. The parasite list from the Vienna Forest on the boundary to the Pannonic continental climatic region shows still a certain correspondence to the parasite lists of the Black Forest and the Vosges. The parasite complex observed in the Moravian aerea, however, takes a somewhat exceptional position. In all the observation areas Glypta murinanae Bauer is clearly dominating among the larval parasites. Among the pupal parasites, the regularly occurring Itoplectis maculator F. five times was observed to be dominating, being removed only two times into the second place by Phaeogenes maculipennis Steph. This latter species, in spite of its irregular occurrence, is mentioned as very frequent in three reports and two times it was found to be the most important pupal parasite. Apechtis resinator Thunb., A, rufata Gmel. and Blondelia nigripes Fall. occasionally appeared in the 3d. and 4th. place of the parasite lists. All the other species were only scarcely to be found. The observations in 1955 demonstrated, that the composition and, in a lesser degree also the effectiveness of the parasite complex of C. murinana Hb. is influenced by the ecological preferences and also by the phenology of the single parasite species. Further, there seem to be also correlations between the gradation phase and the phenology of the Fir Budworm and its reduction by parasites.