コガタアカイエカの殺虫剤感受性について

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タイトル別名
  • On the susceptibility of insecticides against the vector mosquito of Japanese encephalitis, Culex tritaeniorhynchus summorosus Dyar
  • コガタアカイエカ ノ サッチュウザイ カンジュセイ ニ ツイテ

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説明

Insecticide susceptibility of 4th instar larvae and adults of Culex tritaeniorhynchus summorosus was studied using dipping method and topical application method. The mosquitoes of OK7 strain were reared and maintained from eggs laid by wild-caught adults in Osaka district, 1967. The following results were obtained. 1. LC_<50> of 13 insecticides were determined and may be divided into four groups as follows in descending order : 1) dursban, karphos, abate, Dowco 214 and methyl-parathion 2) fenthion, pp'-DDT and trichlorfon 3) fenitrothion, fenchlorfos, diazinon and malathion 4) γ-BHC. Gamma BHC was most inferior to above chemicals. 2. The larvae of OK7 strain were highly resistant to DDT and BHC. The LC_<50> of pp'-DDT in OK7 strain was ten times more than that of Okayama colony, and that of γ-BHC 250 times more than that of Jindaiji colony. From the data of insecticide susceptibility of C. tritaeniorhynchus summorosus larvae reported by several workers from various localities in Japan, this mosquito seems to have developed more and more resistance to DDT and BHC with years. 3. Refering to the degree of susceptibility to the organophosphorous compounds, the OK7 strain seems to stand at the medium position among the strains reported. 4. The effect of temperature on the toxicity of insecticides was tested with larvae. The toxicity of pp'-DDT and γ-BHC was showed to increase with lower temperature and that of fenitrothion and fenthion to behave reversely.

収録刊行物

  • 衛生動物

    衛生動物 24 (3), 219-223, 1974

    日本衛生動物学会

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