Disclosed is the use of a composition for seed treatment, wherein the composition comprises: active ingredient； polyarylphenol polyalkoxy ether phosphate and/or polyarylphenol polyalkoxy ether sulphate having the formula (I) e.g. pyraclostrobin, wherein in the variables is defined in the specification or an agriculturally acceptable base addition salt thereof； and a copolymer comprising: (i) monomer units of at least one ester of an ethylenically unsaturated carboxylic acid, wherein the carboxylic acid ester has an alkoxylate residue of the general formula (II) (R1)n-X-(CHR2CH2O)w-(CHR3CH2O)x-(CHR4(CH2)yO)z-, e.g. Altox 4913 in which the variable are defined in the specification and (ii) monomer units of at least one additional copolymerizable comonomer.
