Polymer film impregnated with lamda-cyhalothrin was installed beneath concrete slabs of 200 x 200 x 14 cm and covered with a simple roof structure. Disks of film and core samples of sand beneath the polymer film were obtained annually for bioassay. Bioassay result indicated that 6 years after the installation, sufficient quantity of lamda-cyhalothrin exits beneath the film to repel termite penetration.
Species 1: Isoptera Rhinotermitidae Coptotermes formosanus (Formosan subterranean termite)
Species 2: Isoptera Rhinotermitidae Reticulitermes flavipes (eastern subterranean termite)
Keywords: field degradation, sub-slab barrier
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