Control of aquatic weeds with endothall and ALS-inhibiting agent
View Patent ↗Described are preferred methods and compositions for controlling aquatic weeds that involve the use of an ALS-inhibiting herbicidal agent such as penoxsulam in combination with endothall. Preferred herbicidal combinations allow for enhanced control when treating a body of water to control a target weed population, such as hydrilla.
1. 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.
2. The method of claim 1 , wherein said providing comprises providing the endothall at a level of about 1.4 ppm or less in the body of water.
3. The method of claim 2 , wherein the ALS-inhibiting herbicide is penoxsulam.
4. The method of claim 2 , wherein the ALS-inhibiting herbicide is imazamox.
5. The method of claim 2 , wherein the ALS-inhibiting herbicide is bispyribac sodium.
6. The method of claim 1 , wherein aquatic weeds include hydrilla.
7. The method of claim 1 , wherein said providing comprises applying the endothall and ALS-inhibiting herbicide to the body of water simultaneously.