abstract |
An insecticidal composition comprises (a) 2, 4-dioxo-1-(2-propynyl)-imidazolidin-3-ylmethyl chrysanthemate and (b) at least one mono- or di-carboxylic acid ester having 16 to 19 carbon atoms, the weight ratio of (a) to (b) being from 3:1 to 1:100. The ester strengthens the activity of (a). |