Abstract
Since insecticides have been used for controlling insect pests, many species among them have become resistant. Such a phenomenon is presumed to be an example of “rapid evolution”. Then, it should be interesting to study insecticide resistance by the method of population genetics from the view points of evolution mechanism. Although the fruit fly, Drosophila, is not included in the insect pests, it is the best material for a genetic analysis of its resistance by utilizing its many mutant genes. The experimental results obtained with Drosophila could furnish useful information for studying the resistance of insect pests, such as house fly, mosquito etc.
