Solvents and Insecticidal Efficacy of the Aerosol Containing Tetramethrin and <i>d</i>-Phenothrin

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  • TSUDA Shigenori
    Takarazuka Research Center, Pesticides Division, Sumitomo Chemical Co., Ltd.
  • OKUNO Yoshitoshi
    Takarazuka Research Center, Pesticides Division, Sumitomo Chemical Co., Ltd.

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Other Title
  • テトラメスリンと<i>d</i>-フェノスリンを含むエアゾール製剤の溶剤と殺虫効力
  • テトラメスリンとd-フェノスリンを含むエアゾール製剤の溶剤と殺虫効力〔英文〕
  • テトラメスリン ト d フェノスリン オ フクム エアゾール セイザイ ノ ヨ
  • Factors Which Affect the Insecticidal Efficacy of Aerosol Formulation (Part 1)

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Abstract

Effects of solvents on the insecticidal efficacy of spray formulation against houseflies, mosquitos and cockroaches were determined. Among the solvents examined, kerosene with its boiling point of 200°C to 250°C was relatively more effective than others. The gas chromatographic analysis showed the main components of the effective kerosene were paraffins such as dodecane, tridecane and tetradecane. The detailed comparison of the insecticidal efficacy was conducted by employing various paraffins, and tetradecane was found most effective for knockdown efficacy against all the insects. Each paraffin showed different killing efficacy against different insects: Tetradecane showed the strongest killing effect against mosquitos and cockroaches whereas octane to dodecane showed the strongest killing effect against houseflies. The difference in knockdown and killing efficacy against houseflies was considered to be caused by the different behavior of the particles of each paraffin in the air after sprayed.

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