A screening technique of repellents of cockroaches

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  • ゴキブリの忌避剤の試験法について
  • ゴキブリ ノ キヒザイ ノ シケンホウ ニ ツイテ

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A screening method of cockroach repellents was described. A filter paper (Toyo No.2., 10×9.6cm) impregnated with repellent at one prescribed concentration was set into a paper tube (10cm long by 3.0cm in diameter). The paper tubes were placed in a plastic cage (30×23×6cm), and then 50 adults of the German cockroach, Blattela germanica L., were released. Repellency was evaluated from number of the roaches in tube after 24 hours as follows; Repellency (%)={(Number of roaches in untreated tube)-(Number of roaches in treated tube)}×100/(Number of roaches in untreated tube).

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