A water-borne aerosol composition containing an oil soluble insecticidal component (A), a hydrophobic organic solvent (B), water (C), a non-ionic surfactant (D) and a propellant (E), wherein the oil soluble component (A) is 4-methoxymethyl-2,3,5,6-tetrafluorobenzyl 3-(2-cyano-1-propenyl)-2,2-dimethylcyclopropanecarboxylate and wherein the non-ionic surfactant (D) has a HLB in the range of 4.1 to 7.0, shows an excellent insecticidal activity and is useful.本發明提供水性氣溶膠組成物,其含有油溶性殺蟲成分(A)、疏水性有機溶劑(B)、水(C)、非離子界面活性劑(D)以及推進劑(E),其中,該油溶性成分(A)為3-(2-氰基-1-丙烯基)-2,2-二甲基環丙烷羧酸4-甲氧基甲基-2,3,5,6-四氟苯甲酯,且該非離子界面活性劑(D)具有範圍為4.1至7.0的HLB,該水性氣溶膠組成物展現優良的殺蟲活性且為有用的。
