Monitoring and health effect assessment of spray drift following the application of fenitrothion EC by a radio-controlled helicopter over pine trees in Shizuoka prefecture

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  • Ichikawa Yujiro
    Laboratory of Pesticide Toxicology, Graduate School of Horticulture, Chiba University
  • Motoyama Naoki
    Laboratory of Pesticide Toxicology, Graduate School of Horticulture, Chiba University

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  • 静岡県で無人ヘリコプターで松林に散布されたフェニトロチオン乳剤の飛散状況ならびに健康影響評価
  • シズオカケン デ ムジン ヘリコプター デ マツバヤシ ニ サンプサレタ フェニトロチオン ニュウザイ ノ ヒサン ジョウキョウ ナラビニ ケンコウ エイキョウ ヒョウカ

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Abstract

The present study monitored the atmospheric concentration and deposition on the ground of fenitrothion and fenitro-oxon over time following fenitrothion application by a radio-controlled helicopter over pine trees in Shizuoka prefecture. In all cases, the fenitrothion concentration in the atmosphere was lower than the permissible limit of 10 μg/m3 assigned for residential areas. Fenitrothion deposition on the ground was higher within the sprayed area than the surrounding area, but in either area it was below the assumed no-adverse-effect level for dermal exposure. The mortality of houseflies placed within the sprayed area reached 100%, but was very low or insignificant in the surrounding area. Medical examination conducted before and after the application of 8 subjects engaged in drift monitoring as well as 2 subjects engaged in spraying showed no significant health effects.

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