Basic studies on chemical control of acaroid mites. IV : Practical control of the mites in Japanese house by the installation of tatami with the paper sheets treated with fenthion and fenitrothion

Abstract

A test was carried out to control the acaroid mites found in tatami (straw mats) in the dwellings during May to July in 1970, by using paper sheets impregnated with fenthion and fenitrothion, covering the entire upper and lower surface of the tatami. Results of the present test showed that the paper sheets with 0.37% dieldrin, 0.5% fenthion and 1.0% fenitrothion (100ml/m^2) produced reductions of 95% to 100%, 99% to 100%, and 100%, respectively, compared with the number of mites counted in the untreated tatami at the end of the test, two months after the installation of the sheets.