| abstract |
An insecticidal composition containing as an active ingredient an insecticidally effective amount of 10 to 30 % by weight of (+)-cis- and 70 to 90 % by weight of (+)-trans-chrysanthemate of the formula O PARALLEL CH3 ROC-CH-CH-CH=C ANGLE CH3 (I) ANGLE C ANGLE CH3CH3 wherein R is IN WHICH R1 is an allyl or propargyl group, R2 is a propargyl, benzyl or phenoxy group, R3 is a hydrogen atom or a methyl group, R4 is a hydrogen atom or an ethynyl group and Y is an oxygen atom or -CH=CH- group; and An insecticidal composition containing as an active ingredient an insecticidally effective amount of (a) at least one of above-mentioned (+)-cis,trans-chrysanthemates having said cis to trans ratio and (b) at least one of chrysanthemates prepared from a chrysanthemic acid having a cis to trans ratio different from that of the (+)-cis,trans-chrysanthemic acid moiety of the above formula (I) and an alcohol moiety of the above formula (I) having a structure different from that of the alcohol moiety of the (+)-cis,trans-chrysanthemates of above (a). |