A formulation for controlling undesired plants comprising (i) pinoxaden, its stereoisomers, salts or solvates thereof and (ii) above 50 w/w% to 99 w/w % of an oil carrier; characterized in that the oil carrier has a pH of 5.0 or more, as measured by a process consisting of the steps of a) making a deionized water mixture having 1 w/w% of oil; b) stirring the mixture of the previous step with a magnetic stirrer at 1,500 RPM for 10 minutes at 25°C; c) allowing the phases in the mixture to separate for 10 min at 25°C, d) collecting into a separate vial the lower aqueous phase; e) measuring at 25°C the pH of aqueous phase collected using a JENWAY 3510 pH meter, with an AgCl, liquid filled single junction electrode, such that the electrode and the thermocouple of the pH meter are inserted into the vial containing the aqueous water phase until the measured pH value is stable for 10s; wherein the water content in the oil is less than 0.2 w/w%, with respect to the total weight of the oil, as measured by Karl-Fischer titration; and wherein said formulation is an oil dispersion. (i) pinoxaden, its stereoisomers, salts or solvates thereof and (ii) above 50 w/w% to 99 w/w % of an oil carrier; characterized in that the oil carrier has a pH of 5.0 or more, as measured by a process consisting of the steps of a) making a deionized water mixture having 1 w/w% of oil; b) stirring the mixture of the previous step with a magnetic stirrer at 1,500 RPM for 10 minutes at 25°C; c) allowing the phases in the mixture to separate for 10 min at 25°C, d) collecting into a separate vial the lower aqueous phase; e) measuring at 25°C the pH of aqueous phase collected using a JENWAY 3510 pH meter, with an AgCl, liquid filled single junction electrode, such that the electrode and the thermocouple of the pH meter are inserted into the vial containing the aqueous water phase until the measured pH value is stable for 10s; wherein the water content in the oil is less than 0.2 w/w%, with respect to the total weight of the oil, as measured by Karl-Fischer titration; and wherein said formulation is an oil dispersion. characterized in that the oil carrier has a pH of 5.0 or more, as measured by a process consisting of the steps of a) making a deionized water mixture having 1 w/w% of oil; b) stirring the mixture of the previous step with a magnetic stirrer at 1,500 RPM for 10 minutes at 25°C; c) allowing the phases in the mixture to separate for 10 min at 25°C, d) collecting into a separate vial the lower aqueous phase; e) measuring at 25°C the pH of aqueous phase collected using a JENWAY 3510 pH meter, with an AgCl, liquid filled single junction electrode, such that the electrode and the thermocouple of the pH meter are inserted into the vial containing the aqueous water phase until the measured pH value is stable for 10s; a) making a deionized water mixture having 1 w/w% of oil; b) stirring the mixture of the previous step with a magnetic stirrer at 1,500 RPM for 10 minutes at 25°C; c) allowing the phases in the mixture to separate for 10 min at 25°C, d) collecting into a separate vial the lower aqueous phase; e) measuring at 25°C the pH of aqueous phase collected using a JENWAY 3510 pH meter, with an AgCl, liquid filled single junction electrode, such that the electrode and the thermocouple of the pH meter are inserted into the vial containing the aqueous water phase until the measured pH value is stable for 10s; wherein the water content in the oil is less than 0.2 w/w%, with respect to the total weight of the oil, as measured by Karl-Fischer titration; and wherein said formulation is an oil dispersion.