Herbicidal composition
The present invention provides a method for post-emergence selective weed control in turf sites by applying an herbicidal composition comprising sulfentrazone and quinclorac to a locus where weeds are present.
1. A method for post-emergence control of weeds in a turf site wherein the weeds are selected from the group consisting of clover, nutsedge, violet, chickweed, sesbania, kochia, morningglory and pigweed, said method comprising applying a composition comprising a mixture of sulfentrazone and quinclorac in a ratio of from 1:5 to 1:1, at a rate of from 0.375 pound of sulfentrazone and quinclorac/acre to 1.5 pounds of sulfentrazone and quinclorac/acre, provided that the amount of sulfentrazone applied is equal to at least 0.09 lb/acre.
2. The method of claim 1 wherein the ratio of sulfentrazone to quinclorac is 1:3.
3. The method of claim 2 wherein the mixture of sulfentrazone and quinclorac is applied at a rate of from 0.75 pound of sulfentrazone and quinclorac/acre to 1.25 pounds of sulfentrazone and quinclorac/acre.
4. The method of claim 1 whereby the mixture provides extended duration of control over said weeds compared with applying the individual components of the mixture to said weeds.
5. The method of claim 4 wherein the method provides extended duration of control for at least 14 days after treatment.
6. The method of claim 5 wherein the weed is clover and wherein extended duration of control comprises control of clover for at least 21 days after treatment.