Dr. Murai Éva szerk.: Parasitologia Hungarica 22. (Budapest, 1989)

In places which are cleaned properly and regularly, fly emergence Is Improbable since manure is removed from the stables. PAPP (1975) called attention to the fact that breeding sites form a low ratio of the stable floor surface; this was why treatments against larvae seemed promising. An experiment aimed at surveying the fly breeding sites and control spraying with Methoprene was performed by EROS et al. (1977> in pig farrowing boxes, fattening pens and in a heifer stable. The compound used proved extremely effective in every type of stable (very few fly hatched out from samples taken on the treated sites). a: boxes; b: paddocks

} c: hayracks; d: drinking troughs Fig. 1. Groundplan of the calf house Measurements of the calf house (in m): Breadth of boxes 4. 50 Length of boxes 7.00 Breadth of hayracks 0.50 Length of hayracks 4.80 Breadth of feeding troughs 0.50 Length of feeding troughs 2.30 Breadth of drinking troughs 0.30 Length of drinking troughs 0.67 MATERIAL AND METHODS The survey was carried out in a calf house and three cow barns of a dairy farm in Apai (near Dömsöd, Central Hungary) in the summer of 1984 (see groundplan of the buildings in Figs 1 and 2). The calf house was divided into 10 boxes with a joining paddock with concrete floor. The thick straw bedding applied inside remained there for about a month. Manure was removed from the paddocks every day. There were 10-15 calves in a box. All three cow barns had the same construction (50-50 stalls in two lines, concrete floor, central feeding way, self-drinkers, dung-conduit). Cows were tied up in the barn only during milking and feeding, otherwise they were staying in an outdoor confine 80-100 meters away from the barns. Manure was removed from the cow barns and carried away every day„ Sampling The first sampling took place on 1 June, 1984. Samples were taken from places which were hardly cleanable as well as from places where feed waste and/or manure were accumulated.