{HEAD ~ A method} for controlling weeds comprising administering {TAIL ~ an effective amount} for controlling said weeds of at least one compound of formula 1 or a salt thereof to the weeds or their habitat 
comprising administering
{ HEAD ~ A method } for controlling weeds comprising administering { TAIL ~ an effective amount } for controlling said weeds of at least one compound of formula 1 or a salt thereof to the weeds or their habitat
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH