Stable single phase pesticidal emulsifiable concentrates are provided which comprise (a) a pesticide mixture comprising a major amount of a water insoluble pesticide and a minor amount of a water soluble pesticidal salt (b) a solvent system comprising (i) a major amount of an organic solvent comprising at least one non aqueous polar solvent and (ii) a minor amount of water and optionally (c) an emulsifying surfactant system enabling an oil in water emulsion to be formed when the concentrate formulation is diluted upon addition to water.
