| 摘要 |
PURPOSE:The titled composition, containing a specific compound as an active constitutent and further a specific phosphite based compound as a stabilizer, and capable of enhancing the stability of high insecticidal and acaricidal efficacy of the active constituent and putting the composition into practical use as a heating fumigant. CONSTITUTION:A stable injurious insect exterminating composition containing 3-(2-methoxyphenyl)-5-methoxy-1,3,4- oxadiazol-2(3H)-one known to have a high injurious insect exterminating activity as an active constituent and a phosphite based compound expressed by formula I [n is 1 or 2; R1-R3 are alkyl or (alkyl- substituted) phenyl when n is 1, and when n is 2, R1 is same as R1 when n is 1; R2 and R3 together form a gorup expressed by formula II], e.g. a compound expressed by formula III, IV or V, as a stabilizer. The above-mentioned composition is capable of sufficiently exterminating various injurious insects, e.g. houseflies, mosquitoes, cockroaches, aphids, leaf-hoppers, mites, etc., without deteriorating the efficacy even in preservation for a long period and heating fumigation.
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