Author(s): Papp, L. & Garzó, P.
Title: Flies (Diptera) of pasturing cattle: some new data and new aspects
Year: 1985
Volume: 46
Pages: 153-168.
Abstract: Results of a wide-ranging study of the flies of pasturing cattle in Hungary are given. Data of 11800 dipterous specimens (reared from cattle droppings, netted from cattle and from their environs) are summarized in three tables. The authors collected flies around the eyes of tethered cattle by a new type of aspirators. It was found that the true size and dominance of the Diptera populations can only be estimated by rearing imagos from cattle droppings. It was noted that there are populations of numerous obligate coprophagous fly spcies (first of all of the families Sepsidae and Sphaeroceridae), which play an important role in the decomposition of cattle droppings. The dominance of the Haematobia larvae in droppings is very low (some tenths of a percent); the authors advance arguments to prove that the only reasonable control strategy is the extermination of their imagoes. The role and importance of larval and imaginal populations of Musca autumnalis are discussed in detail. In Hungary the emergence ratio of Musca autumnalis is 0,5 specimen per g dry weight of cattle droppings from the end of spring to the beginning of autumn, their larvae embody the most important larval population in the rapid decomposition of droppings. On the basis of new data an estimation was made for the determination of the fraction of the imaginal moment: this is 0,1 to less than 1%, probably about 0,5%. A trial is made for the first time to evaluate the importance of the imagoes and of the larvae developing in droppings synchronously. Any application of nonselective larvicides on pastures is strongly rejected.Journal: Folia entomologica hungaricaJournal abbreviation: Folia ent. hung.ISSN: 0373-9465Publisher: , Editor(s): Mahunka, S.