Aqueous concentrated herbicidal compositions containing glyphosate salts and dicamba salts

1. An aqueous herbicidal concentrate composition comprising:

(a) a glyphosate component comprising the monoethanolamine salt of glyphosate;

(b) a dicamba component comprising the diglycolamine salt of dicamba; and

(c) a surfactant system, wherein (i) the composition contains a total active herbicide loading of glyphosate monoethanolamine salt and dicamba diglycolamine salt of at least about 360 grams acid equivalent per liter; (ii) the pH of the concentrate composition is from 4.8 to 5.7; and (iii) the acid equivalent weight ratio of glyphosate monoethanolamine salt to dicamba diglycolamine salt is from about 1:1 to about 3:1; and wherein the surfactant system comprises an alkoxylated tertiary etheramine having the structure of formula (II):

wherein R 1 is a hydrocarbyl or substituted hydrocarbyl having from about 4 to about 22 carbon atoms; R 2 and R 3 are each independently a hydrocarbylene having 2, 3, or 4 carbon atoms; each R 4 is independently hydrogen or C 1-6 alkyl, m is an average number from about 1 to about 10; and the sum of x and y is an average value ranging from about 2 to about 60; and an alkylpolysaccharide surfactant having the structure of formula (III):

R 5 —O-(sug) u   (III)

wherein R 5 is a straight or branched chain substituted or unsubstituted hydrocarbyl selected from alkyl, alkenyl, alkylphenyl, alkenylphenyl having from about 4 to about 22 carbon atoms; the sug moiety is a saccharide residue; and u is an average number from 1 to about 10.

2. The composition of claim 1 wherein the pH of the concentrate composition is from 4.8 to 5.6.

3. The composition of claim 1 wherein the pH of the concentrate composition is from about 5 to 5.5.

4. The composition of claim 1 wherein R 1 is an alkyl having an average value ranging from about 4 to about 22 carbon atoms; R 2 and R 3 are independently ethylene, propylene, isopropylene; R 4 is hydrogen; m is an average value ranging from about 1 to 5; and the sum of x and y is an average value ranging from about 2 to about 25.

5. The composition of claim 1 wherein R 1 is C 12-14 ; R 2 is isopropyl; R 3 is ethylene; R 4 is hydrogen; m is 2; and the sum of x and y is 5.

6. The composition of claim 5 wherein the surfactant system constitutes from about 2.5 wt. % to about 10 wt. % of the composition.

7. The composition of claim 1 wherein the alkylpolysaccharide surfactant is an alkylpolyglucoside wherein R 5 is a branched or straight chain alkyl group having from 4 to 22 carbon atoms or a mixture of alkyl groups having an average value within the given range; sug is a glucose residue; and u is from 1 to about 5.

8. The composition of claim 1 wherein the surfactant system constitutes from about 2.5 wt. % to about 15 wt. % of the concentrate composition.

9. The composition of claim 1 wherein the pH of the concentrate composition is from 5 to 5.7.

10. The composition of claim 1 wherein the surfactant system constitutes from about 2.5 wt. % to about 10 wt. % of the composition.

11. The composition of claim 1 wherein the total active herbicide loading of glyphosate monoethanolamine salt and dicamba diglycolamine salt is at least about 450 grams acid equivalent per liter.

12. The composition of claim 1 wherein the total active herbicide loading of glyphosate monoethanolamine salt and dicamba diglycolamine salt is from about 360 g/l to about 550 g/l on an acid equivalent basis.

13. The composition of claim 1 wherein the total active herbicide loading of glyphosate monoethanolamine salt and dicamba diglycolamine salt is from about 480 g/l to about 540 g/l on an acid equivalent basis.

14. The composition of claim 1 wherein the total active herbicide loading of glyphosate monoethanolamine salt and dicamba diglycolamine salt is from about 480 g/l to about 520 g/l on an acid equivalent basis.

15. The composition of claim 1 wherein the composition does not include a polybasic polymer.

16. An aqueous herbicidal concentrate composition comprising:

(a) a glyphosate component comprising the monoethanolamine salt of glyphosate;

(b) a dicamba component comprising the diglycolamine salt of dicamba; and

(c) a surfactant system comprising an alkoxylated tertiary etheramine surfactant and an alkylpolyglucoside surfactant, wherein (i) the composition contains a total active herbicide loading of glyphosate monoethanolamine salt and dicamba diglycolamine salt of at least about 360 grams acid equivalent per liter; (ii) the pH of the concentrate composition is from 4.8 to 5.7; (iii) the acid equivalent weight ratio of glyphosate monoethanolamine salt to dicamba diglycolamine salt is from about 1:1 to about 3:1, (iv) the composition contains at least about 2.5 wt. % of the alkoxylated tertiary etheramine surfactant, and (v) the composition contains a total surfactant concentration that is from about 2.5 wt. % to about 10 wt. %.

17. The composition of claim 16 wherein the alkoxylated tertiary etheramine has the structure of formula (II):

wherein R 1 is a hydrocarbyl or substituted hydrocarbyl having from about 4 to about 22 carbon atoms; R 2 and R 3 are each independently a hydrocarbylene having 2, 3, or 4 carbon atoms; each R 4 is independently hydrogen or C 1-6 alkyl, m is an average number from about 1 to about 10; and the sum of x and y is an average value ranging from about 2 to about 60.

18. The composition of claim 16 wherein the alkylpolysaccharide surfactant has the structure of formula (III):

R 5 —O-(sug) u   (III)

wherein R 5 is a straight or branched chain substituted or unsubstituted hydrocarbyl selected from alkyl, alkenyl, alkylphenyl, alkenylphenyl having from about 4 to about 22 carbon atoms; the sug moiety is a saccharide residue; and u is an average number from 1 to about 10.

19. The composition of claim 16 wherein the composition does not include a polybasic polymer.