Betrachtung der Gallmücken (Diptera, Cecidomyiidae) an dominanten Forstgehölzen Eurasiens nach ihrem Schädlichkeitsgrad mit einigen besonderen taxonomischen Problemen

1996

8 Lit. Ang.

Unselbständiges Werk

3718

200044371

Evaluation of the harmfulness degree of gall midges (Diptera, Cecidomyiidae) on dominant trees in Eurasia and some taxonomical problems of gall midges on trees. All gall midges species similarly as other insects developing on economically important trees and shrubs are usually designated as pests, as well as in cases if they destroy or damage their host plants or if they were found on their host plant species only several times during the last 150 years. This problem is shown here on gall midges developing on five dominant tree species. Four degree scala was elaborated for evaluation ot the degree of harmfulness. The taxonomical problems of the complex of several species of the genus Resseliella and of the species Mikiola orientalis are discussed.