Method for control of cyanobacterial algae, mosses, liverworts, hornworts and other bryophytes

1. A method for controlling unwanted Bryum agrenteum on golf course grass comprising applying an effective amount of protoporphyrinogen oxidase enzyme-inhibiting herbicides selected from the group consisting of carfentrazone ethyl and metabolites of carfentrazone ethyl to the golf course grass.

2. The method of claim 1 , wherein said metabolites of carfentrazone ethyl are selected from i) α,2-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzenepropanoic acid, ii) 2-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzenepropenoic acid, 2-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzoic acid, and iv) 2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzenepropanoic acid.

3. The method of claim 1 , wherein said carfentrazone ethyl is in a 1.9 EW formulation and used at a rate of from about 3.4 fluid ounces per acre to about 13.4 fluid ounces per acre.

4. The method of claim 3 , wherein said rate is about 6.7 fluid ounces per acre.

5. The method of claim 1 , wherein said protoporphyrinogen oxidase enzyme-inhibiting herbicide is combined with a second herbicide.

6. The method of claim 5 , wherein said second herbicide is selected from the group consisting of amines, esters, and salts of 2,4-D, dichloprop, dicamba, mecoprop, 2-methyl-4-chlorophenoxyacetic acid and various combinations of these products and atrazine, clopyralid, foransulfuron, glufosinate, glyphosate, halosulfuron-methyl, imazaquin, metsulfuron, quinclorac and triclopyr.

7. The method of claim 1 , wherein said protoporphyrinogen oxidase enzyme-inhibiting herbicide is combined with a dispersing agent.

8. The method of claim 7 , wherein said dispersing agent is X-77 Spreader present in a concentration of about 0.25% volume/volume.