A survey of occurrence of tabanid flies at Toyota Municipal Livestock Center in Aichi Prefecture

Abstract

Seasonal prevalences of tabanid flies were surveyed by CO_2-baited mosquito-net traps at Toyota Municipal Livestock Center in Aichi Prefecture during the fly season of 1991. In total 839 flies belonging to 3 genera, 11 species, were collected. Tabanus trigeminus was the most abundant, occupying 41.7% of the total catches, followed by T. trigonus (19.2%), T. rufidens (18.2%) and Atylotus bivittateinus (9.5%). Tabanid flies occurred mostly during middle July to early September with a peak in late July. The fly season of T. kinoshitai and T. trigeminus lasted for about 4 months, while that of T. fulvimedioides was about 20 days. Single or double activity peak at the midday or higher activity in the late daytime was observed during middle July to early September.