TWI812850B

Provided is a one-liquid-type aqueous aerosol composition having excellent solubility in an aerosol composition of a pyrethrum extract, and having excellent stability and insecticidal efficacy as a one-liquid-type aqueous aerosol composition. This one-liquid-type aqueous aerosol composition contains: an undiluted aerosol solution containing (a) a pyrethrum extract, (b) a surfactant, (c) a C8-C16 aliphatic hydrocarbon, and (d) water; and (e) liquid petroleum gas (LPG) serving as a propellant. The (b) surfactant contains (f) a polyethylene glycol alkyl ester and (g) a sorbitan fatty acid ester, the blended weight ratio thereof [(f)/(g)] being 0.5 ≤ [(f)/(g)] ≤ 2.5, the blended amount of the (d) water relative to the total amount of the undiluted aerosol solution being 15-53 mass% (w/v), and the blended amount of the (e) propellant relative to the total amount of the one-liquid-type aqueous aerosol composition being 40-70 vol% (v/v).