Liquid sulfonylurea herbicide formulations
Disclosed are single liquid-phase herbicide compositions comprising by weight, from 0.1 to 20% of one or more sulfonylurea herbicides, from 0 to 40% of one or more biologically active agents other than sulfonylurea herbicides, from 0.1 to 20% of one or more lignosulfonates, from 0 to 99.8% of one or more fatty acid esters of C 1 -C 4 alkanols, and from 0 to 50% of one or more additional formulating ingredients.
1. A single liquid-phase herbicide composition comprising by weight relative to the total weight of the composition:
(a) from 0.1 to 20% of nicosulfuron, metsulfuron-methyl, thifensulfuron-methyl, or rimsulfuron, or mixtures thereof;
(b) from about 1 to about 8% of one or more lignosulfonates;
(c) from 40 to 99.8% of methyl esters of one or more fatty acids; and
(d) from 6 to 50% of nonionic surfactant polyoxyethylated sorbitol esters,
wherein the single liquid-phase herbicide composition does not contain an ethoxylated fatty amine surfactant; and
the single liquid-phase herbicide composition excludes emulsions.
2. The composition of claim 1 further comprising one or more nonsulfonylurea herbicides and/or herbicide safeners.
3. The composition of claim 2 further comprising atrazine.
4. The composition of claim 1 wherein the one or more lignosulfonates of component (b) is one or more ammonium, alkali metal or alkaline earth metal lignosulfonate salts.
5. The composition of claim 4 wherein the one or more lignosulfonates of component (b) is sodium lignosulfonate.
6. The composition of claim 1 wherein the composition further comprises a clay.
7. The composition of claim 1 wherein component (b) is from 3 to about 8% of the composition by weight relative to the total weight of the composition.
8. The composition of claim 1 wherein the composition contains no more than 1% water by weight relative to the total weight of the composition.
9. A single liquid-phase herbicide composition comprising by weight relative to the total weight of the composition
(a) from 0.1 to 20% of nicosulfuron, or salts thereof;
(b) from 3 to about 8% of one or more lignosulfonates; and
(c) from 40 to 99.8% of methyl esters of one or more fatty acids; and
(d) from 6 to 50% of nonionic surfactant polyoxyethylated sorbitol esters;
wherein the single liquid-phase herbicide composition does not contain an ethoxylated fatty amine surfactant; and
the single liquid-phase herbicide composition excludes emulsions.
10. The composition of claim 9 wherein the composition further comprises a clay.
11. The composition of claim 9 wherein the one or more lignosulfonates of component (b) is one or more ammonium, alkali metal or alkaline earth metal lignosulfonate salts.
12. The composition of claim 11 wherein the one or more lignosulfonates of component (b) is sodium lignosulfonate.