| 摘要 |
PURPOSE:To provide an insecticide capable of keeping its activity over a long period at a low rate of application, by using menthone which is liquid at normal temperature and exhibits excellent insecticidal effect by its vapor or using the compound in combination with other sublimable insecticide. CONSTITUTION:The objective insecticide contains menthone as an active component. Menthone is a slightly viscous liquid naturally existing in peppermint, geranium, etc., and producible by the extraction and purification of the plant. The insecticide may be incorporated further with at least one kind of compound selected from naphthalene, p-dichlorobenzene and dimethyl fumarate. In the case of using menthone singly, it is impregnated in a carrier such as paper board, zeolite, perlite, etc., and put into an air-permeable bag made of Japanese paper or into a properly perforated bag made of a plastic or moistureproof cellophane. When menthone is used in combination with other sublimable insecticide, menthone is directly impregnated in the sublimable insecticide.
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