Susceptibility of certain stage of the German and American cockroaches to lindane, chlordane and dieldrin

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  • Hirakoso Shunnosuke
    Department of Parasitology, Institute for infectious Diseases, University of Tokyo:Chuo Kagaku Co, LTD.
  • Mizutani Kiyoshi
    Department of Parasitology, Institute for infectious Diseases, University of Tokyo

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Other Title
  • チヤバネゴキブリ, ワモンゴキブリ各期幼虫及び成虫の lindane, chlordane, dieldrin に対する感受性について
  • チャバネゴキブリ,ワモンゴキブリ各期幼虫及び成虫のlindane,chlordane,dieldrinに対する感受性について
  • チャバネゴキブリ , ワモンゴキブリ カク キ ヨウチュウ オヨビ セイチュウ ノ lindane , chlordane , dieldrin ニ タイスル カンジュセイ ニ ツイテ

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Description

Males, females and larvae of certain stage of German and American cockroaches were brought into contact with filter paper treated by 5% lindane, 5% chlordane and 5% dieldrin xylene solution at rate of 50cc per m^2, and the knokdown percentage of the roaches was recorded. After the results, younger stage of the larvae was more susceptible than that of the older ones, though the adult of males gave higher knockdown percentages than the old or last instar larvae. The susceptibility of German and American roaches of the same body weight was nearly in the same level to lindane or dieldrin. To chlordane German roaches were more tolerant than American ones. With the ten-fold increase of the body weight in the larval German and American roaches, the LT-50's increase 2.5 and 2.5 times with lindane, 1.9 and 2.0 times with chlordane and 2.0 and 4.0 times with dieldrin, respectively.

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