Herbicide compatibility improvement
A herbicidal composition comprises an aqueous solution of a plurality of salts of glyphosate wherein said glyphosate is in anionic form accompanied by low molecular weight non-amphiphilic cations, wherein a major amount but less than 100% of the low molecular weight non-amphiphilic cations are potassium cations, and wherein the composition has a measured pH of at least about 4.8.
1. A herbicidal composition comprising:
an aqueous solution of a plurality of salts of glyphosate wherein (a) said glyphosate is in anionic form accompanied by low molecular weight non-amphiphilic cations; (b) a major amount but less than 100% of the low molecular weight non-amphiphilic cations are potassium cations; (c) the aqueous solution has a measured pH of at least 4.8 to less than 6; and (d) the aqueous solution has a total glyphosate a.e. concentration of about 360 to about 650 g/l; and
a salt of 2,4-dichlorophenoxyacetic acid (2,4-D).
2. The composition of claim 1 , wherein the aqueous solution has a measured pH of 4.8 to about 5.5.
3. The composition of claim 1 , wherein the aqueous solution has a measured pH of 4.8 to about 5.2.
4. The composition of claim 1 , wherein the aqueous solution has a total glyphosate a.e. concentration of about 400 to about 600 g/l.
5. The composition of claim 1 , wherein the balance to 100% of the low molecular weight non-amphiphilic cations is provided in part or in whole by low molecular weight organic ammonium cations.
6. The composition of claim 5 , having a mole ratio of potassium to low molecular weight organic ammonium cations of about 55:45 to about 99:1.
7. The composition of claim 5 , wherein said low molecular weight organic ammonium cations comprise isopropylammonium cations.
8. The composition of claim 1 , further comprising at least one surfactant.
9. The composition of claim 8 , wherein the weight ratio of glyphosate a.e. to total surfactant is not greater than about 10:1.
10. The composition of claim 1 , wherein the salt of 2,4-D is a potassium, sodium, ammonium or organic ammonium salt.
11. The composition of claim 1 , wherein the salt of 2,4-D is selected from the group consisting of methylammonium, dimethylammonium, n-propylammonium, isopropylammonium, mono-, di- and triethanolammonium salts.
12. The composition of claim 1 , wherein the salt of 2,4-D is the dimethylammonium salt of 2,4-D.
13. The composition of claim 1 , having a glyphosate/2,4-D a.e. ratio of about 1:5 to about 20:1.
14. The composition of claim 1 , having a mole ratio of potassium to non-potassium low molecular weight non-amphiphilic cations of about 55:45 to about 99:1.
15. The composition of claim 14 , having a mole ratio of potassium to non-potassium low molecular weight non-amphiphilic cations of about 55:45 to about 95:5.
16. The composition of claim 1 , wherein more than 50% but less than 99% of the low molecular weight non-amphiphilic cations are potassium cations.
17. The composition of claim 1 , wherein more than 55% of the low molecular weight non-amphiphilic cations are potassium cations.
18. A herbicidal composition comprising:
an aqueous solution of a plurality of salts of glyphosate wherein (a) said glyphosate is in anionic form accompanied by low molecular weight non-amphiphilic cations; (b) more than 50% but less than 99% of the low molecular weight non-amphiphilic cations are potassium cations; (c) the aqueous solution has a measured pH of at least 4.8 to about 5.5; and (d) the aqueous solution has a total glyphosate a.e. concentration of about 360 to about 650 g/l; and
a salt of 2,4-D.