Abstract
During summer and autumn of 1964, a field test of fly control with residual treatments of Baytex and dimethoate was carried out in a poultry ranch of Osaka prefecture. Sixteen species of flies were collected in a poultry ranch (Table 1). The dominant species were Sarcophaga peregrina, Fannia scalaris and Ophyra nigra. Emulsion of Baytex was applied in the southern part of the ranch, and wettable dust of dimethoate in the northern part. 0.5% emulsion or suspension of each insecticide was sprayed on the ceiling and walls, at the rate of 50ml per square meter. These applicalions were made with motor compression sprayer. Population density of each flies was estimated by counting the flies adhering to sticky fly tapes which were located at poultry ranch or dwellings. In the results, the population of flesh flies, Sarcophaga peregrina, was markedly decreased after those applications. The reduction of fly populations was also observed in the neighboring houses, but the effect was not limited to flesh flies. It was supposed that the decrease may be attributable mainly to the effect of residues treated on the poultry ranch, and its effect was given for a month.
