Method for weed control in lawn or turf

A method for improving the quality of turf or lawn, the method comprising:

• applying to the turf or lawn a herbicidally effective amount of a composition comprising one or more compounds of formula (I), or salts thereof,
• wherein,
• R1 and R2 each represent hydrogen;
• R3 represents (C1-C5)-alkyl, (C3-C6)-cycloalkyl, (C2-C5)-alkenyl, (C2-C5)-alkynyl or (C1-C5)-alkoxy each optionally substituted;
• G represents OR4, where
• R4 represents hydrogen, or represents (C1-C12)-alkyl, (C3-C7)-cycloalkyl, (C3-C7)-cycloalkyl-(C1-C8)-alkyl, (C2-C8)-alkenyl, (C5-C6)-cycloalkenyl, (C1-C4)-alkylphenyl or (C2-C8)-alkynyl each optionally substituted;
• Z represents a five-membered heterocycle containing an oxygen atom;
• X2, X4 and X6 independently of one another represent hydrogen or fluorine;
• X3 and X5 independently of one another represent hydrogen, chlorine, cyano or fluorine;
• or represent (C1-C3)-Alkyl, (C1-C3)-Alkoxy each optionally substituted.