Automatic monitoring using laser sensor devices for circadian activity and aversion behavior of German cockroach, <i>Blattella germanica</i>

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  • HASHIMOTO Tomoyuki
    Depatment of Environmental Biology, Japan Environmental Sanitation Center
  • ITO Yasutada
    Depatment of Environmental Biology, Japan Environmental Sanitation Center

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Other Title
  • レーザー光センサーを用いたチャバネゴキブリの俳徊行動の日周性と薬剤忌避行動の観察
  • レーザー光センサーを用いたチャバネゴキブリの徘徊行動の日周性と薬剤忌避行動の観察
  • レーザーコウ センサー オ モチイタ チャバネゴキブリ ノ ハイカイ コウドウ ノ ニッシュウセイ ト ヤクザイ キヒ コウドウ ノ カンサツ

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Description

An automatic recording system using laser sensor devices was designed for monitoring the behavior of the German cockroach, Blattella germanica, under laboratory conditions. The apparatus was composed of laser sensor units, a programmable logic controller and a data-storage unit. Using this device, the circadian activities were observed under several photoperiods. In 14L:10D, the number of males, females and 1st instar nymphs passing under the laser sensor in scotophase was significantly greater than in photophase. In addition, the activity rhythm of males under the conditions of 24D (total darkness) or 24L (total light) seemed to be broken down. The aversion behavior of the German cockroach against deet- or permethrin- treated plywood was also investigated. Deet with a concentration of 4 g/m2 almost completely inhibited the passage of cockroaches in scotophase. Permethrin, however, could not completely stop the passage at a concentration of 0.8 g/m2, although more than 30% of the test cockroaches were knocked down one day after treatment. In conclusion, this automatic monitoring system could provide accurate information on cockroach behavior and help estimate the repellency of chemicals.

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