Occurrence of leaf-eating Symphyta (Hymenoptera: Symphyta) insects on native and foreign larch (Larix) species on the Rogow Forest Experiment Area

摘要

In the years 1996-1998 on the Rogow Forest Experiment Area there were investigations carried out on Symphyia (Hymenoptera order) insects feeding on foliage of native European larch (Larix decidua) and its Polish variety (var pslonica) and 6 species and 2 varieties of larch of foreign origin (L, gmelinii, L. gmelinii, var olgensis, L. gmelinii, var prinncipis rupprechti, L. kaempferii, L. laricina, L. occirdentalis, L. sibirica, and L. sukaczewii) as well , as a hybrid of Eauropean and Japanaese larch (L. xeurolepis)`(Table I ). In the result of captures carried out (using yellow bowls)jointly 11 species of Symphyia were found: Two species (Anoplonyx bilineatus and A. pectoralis) were caught only at the mature insect stage, while 9 others (Acantholyda laricis, Aphalcia lariciphila, Anoplonyx ovatus, A. , duplex, Pristiphora erichsonii, P. wesmaeli, P bufo, Larinematus impedectus, and Oligo- nematus laricis) were found at instar stages, and it allowed to identify their trophic linkages with individual species of larch (Table 2).