著者

Suwonkerd Wannapa Prajakwong Somsak 津田 良夫 高木 正洋

出版者

日本熱帯医学会

雑誌

日本熱帯医学会雑誌 (ISSN:03042146)

巻号頁・発行日

vol.25, no.3, pp.113-115, 1997-09-15

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A field study was carried out in 2 villages of Phare Province, Thailand to evaluate effect of the residual spraying of a microcapsulated formulation of 20% fenitrothion (Sumithion 20 MC(R)) on Anopheles minimus populations. In the treatment village, houses were sprayed with 1g/m2 of fenitrothion, except for 2 houses which were selected to spray with 0.5g/m2 of fenitrothion for comparative bio-assay test. The results of bio-assay test showed that mortality of An. minimus was 100% in 1g/m2-30 miniutes until 4 months after the spray. The growth rate of An. minimus population during the first 4 months of the study period in the treatment village was lower than that in the control area. These results suggested that the residual spray of fenitrothion microcapsules at the beginning of the dry season was effective at least for 4 months after the spray and could suppress the density of An. minimus.