Studies on rodenticides : VI. Feeding preference of Norway rats for scilliroside baits and lethal doses of the baits

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  • 殺そ剤に関する研究 : VI. Scilliroside ベイトに対するドブネズミの摂食性とその致死量
  • 殺そ剤に関する研究-6-Scillirosideベイトに対するドブネズミの摂食性とその致死量
  • サッソザイ ニ カンスル ケンキュウ 6 Scilliroside ベイト ニ タイスル ドブネズミ ノ セッショクセイ ト ソノ チシリョウ

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The lethal doses and the feeding preference of scilliroside baits to Norway rats, Rattus norvegicus, were studied in the laboratory. The lethal doses of scilliroside in dry baits were higher than those in wet baits. The approximate lethal doses of scilliroside in dry baits represented per kilogramme body weight of the rats were as follows : male 3.1mg and female 1.7mg for 0.017% bait; male 1.5mg and female 1.0mg for 0.03% bait; male 1.5mg and female 1.0mg for 0.05% bait. The lethal doses in wet baits were as follows : male 1.6mg and female 1.0mg for 0.017% bait; male 1.0mg and female 1.0mg for 0.03% and 0.05% baits. Some of the rats used in the present study tended to avoid feeding dry baits at lethal doses and more males survived than the females; i.e., about 70% of the males and 30% of the females survived with 0.017% dry bait, and about 30% of the males and 15% of the females did with 0.03% and 0.05% dry baits. Some of the rats survived also with the wet baits.

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