Dispersal of a termiticide foam beneath concrete slabs

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  • THOMAS Claude R.
    Urban Pest Control Research Center, Department of Entomology, Virginia Polytechnic Institute and State University
  • BARLOW Robert A.
    Urban Pest Control Research Center, Department of Entomology, Virginia Polytechnic Institute and State University
  • ROBINSON William H.
    Urban Pest Control Research Center, Department of Entomology, Virginia Polytechnic Institute and State University

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Other Title
  • コンクリートスラブの下に注入した泡状防蟻剤の分散
  • コンクリートスラブの下に注入した泡状防蟻剤の分散〔英文〕
  • コンクリート スラブ ノ シタ ニ チュウニュウシタ アワジョウ ボウギザイ

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Description

A 1% (AI) chlorpyrifos termiticide foam was applied beneath concrete slabs through holes spaced 30 and 45cm apart, and 10,and 20cm from a wall. Application was made to slabs with no void between the underside of the concrete and the top of the gravel fill, and to slabs with a 4cm void between the concrete and gravel. Foam was applied at the rate of 15 liters/3 linear m with a straight-tip nozzle. After 24hr 5g samples of the top 2.5cm of soil were taken from four locations : directly beneath the application hole, at the wall in front of the application hole, equal distance between two application holes, and at the wall, equal distance between two application holes. A continuous band of insecticide-treated soil resulted from the foam application using the three hole spacings. There was no significant difference in the amount of chlorpyrifos in the soil at the four sampling locations for the three hole spacings, and for slabs with and without a void beneath the slab.

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