Synergistic herbicidal mixtures for glyphosate-resistant volunteer corn control
The present invention relates to methods for enhancing the herbicidal activity of 2-((3-(2-chloro-4-fluoro-5-(3-methyl-2,6-dioxo-4-(trifluoromethyl)-2,3-dihydropyrimidin-1(6H)-yl)phenoxy)pyridin-2-yl)oxy)acetic acid, methyl 2-((3-(2-chloro-4-fluoro-5-(3-methyl-2,6-dioxo-4-(trifluoromethyl)-2,3-dihydropyrimidin-1(6H)-yl)phenoxy)pyridin-2-yl)oxy)acetate, and ethyl [3-[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-3-yl)phenoxy]-2-pyridyloxy]acetate and to methods for controlling volunteer glyphosate-resistant corn comprising applying synergistic mixtures of 2-((3-(2-chloro-4-fluoro-5-(3-methyl-2,6-dioxo-4-(trifluoromethyl)-2,3-dihydropyrimidin-1(6H)-yl)phenoxy)pyridin-2-yl)oxy)acetic acid, methyl 2-((3-(2-chloro-4-fluoro-5-(3-methyl-2,6-dioxo-4-(trifluoromethyl)-2,3-dihydropyrimidin-1(6H)-yl)phenoxy)pyridin-2-yl)oxy)acetate, ethyl [3-[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-3-yl)phenoxy]-2-pyridyloxy]acetate, or a combination thereof and glyphosate, or a salt thereof, to an area where volunteer glyphosate-resistant corn is growing.
1. A method for enhancing the herbicidal activity of ethyl [3-[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-3 -yl)phenoxy]-2-pyridyloxy]acetate comprising applying a synergistic mixture of ethyl [3-[2-chloro-4 -fluoro-5 -(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3 ,4-tetrahydropyrimidin-3-yl)phenoxy]-2-pyridyloxy]acetate and glyphosate, or a salt thereof, to an area where volunteer glyphosate-resistant corn is growing,
wherein the rate of application of ethyl [3 -[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-3-yl)phenoxy]-2-pyridyloxy]acetate is from about 0.001 to about 10 grams per hectare, and the rate of application of glyphosate, or a salt thereof, is from about 1054 to about 2,000 grams per hectare.
2. The method of claim 1 wherein the glyphosate salt is selected from the group consisting of a potassium salt, a sodium salt, an isopropylamine salt, a trimesium salt, an ammonium salt, and a diammonium salt.
3. The method of claim 2 wherein the glyphosate salt is potassium.
4. The method of claim 1 wherein a glyphosate-resistant crop plant other than corn is growing in the area where the volunteer glyphosate-resistant corn is growing.
5. The method of claim 4 wherein the glyphosate-resistant crop plant is soybeans.
6. A method for controlling volunteer glyphosate-resistant corn comprising applying a synergistic mixture of ethyl [3 -[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-3-yl)phenoxy]-2-pyridyloxy]acetate and glyphosate, or a salt thereof, to an area where volunteer glyphosate-resistant corn is growing,
wherein the rate of application of ethyl [3 -[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-3-yl)phenoxy]-2-pyridyloxy]acetate is from about 0.001 to about 10 grams per hectare, and the rate of application of glyphosate, or a salt thereof, is from about 1054 to about 2,000 grams per hectare.
7. The method of claim 6 wherein the glyphosate salt is selected from the group consisting of a potassium salt, a sodium salt, an isopropylamine salt, a trimesium salt, an ammonium salt, and a diammonium salt.
8. The method of claim 7 wherein the glyphosate salt is potassium.
9. The method of claim 6 wherein a glyphosate-resistant crop plant other than corn is growing in the area where the volunteer glyphosate-resistant corn is growing.
10. The method of claim 9 wherein the glyphosate-resistant crop plant is soybeans.
11. A method for controlling glyphosate-resistant weeds comprising applying a synergistic mixture of ethyl [3-[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-3-yl)phenoxy] -2 -pyridyloxy]acetate-and glyphosate, or a salt thereof, to an area where a glyphosate-resistant weed is growing,
wherein the rate of application of ethyl [3-[2-chloro-4-fluoro-5-(1-methyl-6-trifluoromethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-3-yl)phenoxy]-2-pyridyloxy]acetate is from about 0001 to about 10 grams per hectare, and
the rate of application of glyphosate, or a salt thereof, is from about 1054 to about 2,000 grams per hectare.
12. The method of claim 11 wherein the glyphosate-resistant weed is selected from the group consisting of Lolium multiflorum, Amaranthus palmeri, Amaranthus rudis, Amaranthus tuberculatus, Ambrosia artemisiifolia , and Kochia scoparia .