Lindane-resistance to the so-called Takatsuki strain of the common house fly, Musca domestica vicina. Problems on the breeding of insects for biological assay of insecticides. 3X

Nagasawa, S.

Botyu Kagaku 27(4): 108-112

1962


Accession: 024953137

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Abstract
to a previous paper, some bioassay experiments on the DDT-resistance of the "Takatsuki" strain of the common house fly were carried out using 13 populations which were divided from the original strain and bred separately in different institutions for about 2 years. The results of experiments show that the median lethal dosages of DDT to the common house fly of the "Takatsuki" strain vary considerably with population. Lindane-resistance of the same populations was discussed. The rearing method of the house fly, topical application method of acetone solution of lindane, and the experimental design of the balanced imcomplete blocks based upon a 7 by 7 latin square are all the same as that adopted in the experiment of DDT-resistance. The median lethal dosages of lindane to those populations were in the range from 0.05 to 1.08 μg/female. From the result of lindane and DDT resistance obtained, it was assumed that the populations K, H and A are close to the original population of the "Takatsuki" strain which was reared in the Institute for Chemical Research, Kyoto University at Takatsuki until May 1959. It is impossible to prove this assumption as the original population is not now kept at the institute mentioned above. A general rule strains made DDT-resistant by DDT pressure show no significant cross-resistance to γ-BHC. Among DDT-resistant populations found in the previous paper, only population B seemed to be affected by DDT pressure.