A Field Study on the Effects of Residual Spray of Encapsulated Fenitrothion on Anopheles minimus Population in Phare Province, Northern Thailand.

概要

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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 ®) on Anopheles minimus populations. In the treatment village, houses were sprayed with 1 g/m2 of fenitrothion, except for 2 houses which were selected to spray with 0.5 g/m2 of fenitrothion for comparative bio-assay test. The results of bio-assay test showed that mortality of An. minimus was 100% in 1 g/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.
日本熱帯医学会の論文