カイコの殺虫剤抵抗性に関する研究 : II DDT および Sumithion 抵抗性の遺伝様式

概要

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Interstrain differences in the resistance of the silkworm larvae, Bombyx mori L., to DDT and Sumithion and the mode of inheritance of the resistance were studied. Responses to DDT and Sumithion varied markedly in 269 silkworm strains, and the LD_<50> values (μg/g) of DDT in the susceptible and the most resistant strains were 0.2 and 40.0,respectively, whereas the LD_<50> values of Sumithion in these strains varied from 0.3 to 13.2 When frequency of 269 strains was plotted against log LD_<50> value of each toxicant, a normally distributed curve was obtained. The mean LD_<50> values (μg/g) of DDT and Sumithion were 2.1 and 1.5,respectively, and both the insecticides seemed to have about the same toxicity to the silkworm. However, a significantly negative correlation was obtained (r=-0.42) between the LD_<50> values of DDT and Sumithion. The results of study on the dose-mortality lines of resistant and susceptible strains and their F_1,F_2 and backcrosses indicated that DDT-resistant and Sumithion-resistant characters were inherited as in multifactorial genic systems.
日本応用動物昆虫学会の論文
1966-12-25