The present invention is directed to a method of spraying an aqueous solution of an agrochemical comprising at least one cellulose ether, wherein the cellulose ether is a methyl hydroxyethyl cellulose (MHEC) polymer. The present invention is also directed to a method for reducing spray drift during the spraying of an aqueous solution. The methods comprise: providing a MHEC polymer； combining the MHEC polymer with at least one agricultural chemical and water to obtain an aqueous solution； and spraying the aqueous solution. Further, the present invention is also directed to a method for providing good resistance to rain wash-off of an agricultural chemical which was deposited onto a surface by spraying. This method comprises: providing a MHEC polymer； combining the MHEC polymer with at least one agricultural chemical and water to obtain an aqueous solution； spraying the aqueous solution onto a surface； and evaporating at least part of the water of the droplets of the aqueous solution which were deposited onto the surface by said spraying.
