{HEAD ~ A method} for controlling {TAIL ~ weeds} comprising administering 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 
for controlling
{ HEAD ~ A method } for controlling { TAIL ~ weeds } comprising administering 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 REL REL 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 OTH OTH OTH OTH OTH