Contarinia pseudotsugae (Condrashoff, 1961) - (Douglas-fir needle midge)
This species is one of several gall midges which infest Douglas fir in North America. Since 2015, it has been recorded from several countries in Europe. The adults live only for a few days and females lay their eggs into the young needles emerging in spring. The larvae produce galls, resulting in deformations and dieback. The damage can be significant in Christmas tree plantations. The mature larvae leave the needles in autumn and hibernate in the soil where they pupate in spring.
Publications covering Contarinia pseudotsugae
Journal für Kulturpflanzen - Journal of Cultivated Plants (2017) 69, 351-358
Kati Hielscher (2017)
Contarinia pseudotsugae (Condrashoff, 1961) (Diptera, Cecidomyidae): eine nordamerikanische Gallmücke an Douglasien im Nordostdeutschen Tiefland
[Contarinia pseudotsugae (Condrashoff, 1961) (Diptera, Cecidomyidae):a North American gall midge on Douglas-fir in the northeast German lowlands]