PURPOSE: To control the vermin in an underground water tank, etc., easily, at a low dose, without exterminating the microorganisms of the activated sludge nor causing the problem of fish toxicity of the waste water, in a short time even in the case of the treatment of an underground water tank having complicate structure, by fumigating the underground water tank with a smoking fumigant, and leaving the tank to stand for ≥30min.
CONSTITUTION: A smoking fumigant is evaporated in an underground water tank, a sanitary tank or water contained therein, and left to stand for ≥30min to exterminate the imagoes, chrysalises, and larvae of vermin living in said underground water tank, sanitary tank and water or water surface contained therein. The smoking fumigant is e.g. 3-allyl-2-methylcyclopent-2-en-4-on-1-yl dl- cis/trans- chrysanthemate (ganeral name: allethrin, commercial name: Vinamin), etc. The smoking fumigant may be used in combination with an organic foaming agent emitting nitrogen gas, carbon dioxide gas, etc. The concentration of the active component in the atmosphere in the treating space is preferably 5W 50mg/m3.
ASANO MASASHI
KAGAWA YOSHIROU
KIMURA HIROSHI
| JPS5455731A | 1979-05-04 |
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