Toxic Properties of Nematocides to American Cockroach

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  • MORIKAWA Osamu
    Laboratory of Applied Entomology and Nematology, Faculty of Agriculture, Nagoya University

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  • 殺線虫剤のワモンゴキブリに対する毒性ならびに中毒症状の解析
  • サツセンチュウザイ ノ ワモンゴキブリ ニ タイスル ドクセイ ナラビニ チュウドク ショウジョウ ノ カイセキ

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Abstract

The experiments were done to clarify the modes of action of some nematocides to American cockroach, Periplaneta americana. The LD-50 values of the nematocides for the adult male of the roach, 72 hours after injection, were as follows: ethylene dibromide (EDB) 0.398μg; 1, 2-dibromo-3-chloropropane (DBCP) 0.955μg; cis-1, 3-dichloropropene (cis-D) 0.059μg.<br>EDB poisoned insects paralyzed slowly anddied, while insects poisoned with cis-D or DBCP showed hyperactivity and paralysis, and then died. From the entomographic study of nematocide poisoning of the insect, it was found that the insect treated with DBCP or cis-D showed hyperactivity and tremor simultaneously, being similar to the case of DFP poisoning. On the other hand, the insect treated with EDB showed a response of tremor alone.

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