Patent ID: 8716183

Claim:
A method for controlling aquatic weeds in a body of water, comprising: providing in the body of water a synergistically effective amount of a herbicidal combination including an ALS-inhibiting herbicide and endothall, so as to control the aquatic weeds; wherein said providing comprises adding the endothall to the body of water prior to adding the ALS-inhibiting herbicide or simultaneously with the ALS-inhibiting herbicide to the body of water; wherein the ALS-inhibiting herbicide is selected from the group consisting of penoxsulam, imazamox, and bispyribac sodium; wherein said providing comprises providing the endothall at a level of about 0.1 to about 3.5 ppm in the body of water; and with the further proviso that: (i) where the ALS-inhibiting herbicide is penoxsulam, the penoxsulam is applied to the body of water to provide a penoxsulam level of about 2.5 to 50 ppb in the body of water; (ii) where the ALS-inhibiting herbicide is imazamox, the imazamox is applied to the body of water to provide an imazamox level of about 0.02 to about 0.15 ppm in the body of water: and (iii) where the ALS-inhibiting herbicide is bispyribac sodium, the bispyribac sodium is applied to the body of water to provide a bispyribac sodium level of about 0.01 to about 0.25 ppm in the body of water.