The present invention relates to an emulsifiable concentrate composition, comprising (i) the pesticide tefluthrin; (ii) a solvent for dissolving tefluthrin; (iii) a water-soluble emulsifying surfactant system enabling an oil in water emulsion to be formed when the emulsifiable concentrate composition is diluted with an aqueous solution; (iv) a non-aqueous polar solvent for diluting the water-soluble emulsifying surfactant system; (v) a C2-C10-alcohol to provide physical compatibility between (a) hydrophobic component (ii)) and (b) hydrophilic components (iii) and (iv); to the preparation thereof and to a method of using such a composition to control pests in crops of useful plants.