Mosquito control in the Magadino plain. I. Faunistic survey of the culicids and identification of the species harmful to man.
A faunistic study of the Culicidae was carried out on the Magadino plain (Canton Ticino, Switzerland). The main objective of the research project was to identify the nuisance species in this area. 19 species were recorded: Anopheles claviger, A. maculipennis s.l. (3 spp.), Aedes annulipes, A. cantans, A. intrudens, A. punctor, A. sticticus, A. vexans, A. cinereus, Culiseta annulata, Culex hortensis, C. territans, C. pipiens (2 spp.), C. torrentium, C. theileri and Orthopodomyia pulchripalpis. C. theileri and O. pulchripalpis are new species to the country. The species A. annulipes, A. intrudens, A. sticticus, A. vexans, C. hortensis and C. torrentium are reported for the first time in Ticino. A few species which are present in Switzerland have not been found on the Magadino plain. More than 40% of the adult females caught on human bait were A. vexans. The other species contributing to the nuisance are A. cinereus, A. intrudens and A. sticticus.