An emulsion includes at least one polymeric surfactant, water and at least one organophosphorous compound. The emulsion may include from about 1% to about 40% of the polymeric surfactant and from about 40% to about 80% of the organophosphorous compound. The emulsion may further include at least one salt or additional surfactant. The at least one polymeric surfactant may include silicone-based surfactants, polyoxypropylene-based surfactants, graft copolymers of polysaccharides, and combinations thereof. The at least one polymeric surfactant may account for about 25% to about 100% by weight of the surfactant content in the emulsion and the at least one secondary surfactant, if present, may account for up to about 75% by weight of the surfactant content in the emulsion. The emulsion may have an average dispersed phase drop size of less than about 5 micron, or less than about 1 micron, after 6 months.