Corrosion inhibitors for aqueous pesticide formulations
View Patent ↗The present invention relates to aqueous-containing pesticide concentrates containing an ionic nitrate salt additive as a corrosion inhibitor as well as pesticide compositions prepared from these concentrates and to the use of said compositions for controlling pests.
1. A pesticide concentrate comprising:
a) 2-85% by weight water;
b) 5-90% by weight of at least one pesticide comprising mesotrione, an agriculturally acceptable salt of mesotrione or a metal chelate of mesotrione;
c) an amount of an ionic nitrate salt additive effective in reducing corrosion of metal surfaces, said ionic nitrate salt additive comprising ammonium nitrate; and
d) optionally, other formulation auxiliaries;
wherein the ratio of component c) to component b) is less than or equal to 0.3:1.
2. The concentrate of claim 1 wherein the pH of the composition is 6 or less.
3. The concentrate of claim 1 wherein the at least one pesticide is in the form of a salt of mesotrione or a metal chelate of mesotrione.
4. The concentrate of claim 1 comprising at least one formulation auxiliary in the form of a salt.
5. The concentrate of claim 4 wherein the formulation auxiliary in the form of a salt comprises at least one alkali metal or alkaline earth metal chloride.
6. The concentrate of claim 1 wherein the at least one pesticide comprises a copper or zinc chelate of mesotrione.
7. A pesticidal composition obtained by diluting a concentrate according to claim 1 into a suitable amount of carrier.
8. A pesticidal composition according to claim 7 wherein the carrier is water.
9. The pesticidal composition of claim 7 further comprising at least one member selected from the group consisting of herbicides, fungicides, insecticides, acaricides, and nematicides.
10. A method for the selective control of pests in crops of useful plants, which method comprises treating the useful plants, their seeds or seedlings or the crop area thereof with a pesticidal composition according to claim 7 .
11. The concentrate of claim 1 wherein the pesticide concentrate comprises from 0.001 to 10 wt % of the ionic nitrate salt additive.
12. A pesticide concentrate comprising:
a) 2-85% by weight water;
b) 5-90% by weight of at least one pesticide comprising mesotrione, an agriculturally acceptable salt of mesotrione or a metal chelate of mesotrione;
c) an amount of an ionic nitrate salt additive effective in reducing corrosion of metal surfaces, said ionic nitrate salt additive comprising ammonium nitrate; and
d) one or more other formulation auxiliaries;
wherein the ratio of component c) to component b) is less than or equal to 0.3:1.
13. The concentrate of claim 12 wherein the at least one pesticide comprises a copper or zinc chelate of mesotrione.
14. The concentrate of claim 12 wherein the pH of the composition is 6 or less.
15. The concentrate of claim 12 wherein the pesticide concentrate comprises from 0.001 to 10 wt % of the ionic nitrate salt additive.
16. A pesticidal composition obtained by diluting a concentrate according to claim 12 into a suitable amount of carrier.
17. A pesticide concentrate comprising:
a) 2-85% by weight water;
b) 5-90% by weight of at least one pesticide comprising a copper or zinc chelate of mesotrione;
c) 0.001 to 10 wt % of an ionic nitrate salt additive effective in reducing corrosion of metal surfaces, said ionic nitrate salt additive comprising ammonium nitrate; and
d) optionally, other formulation auxiliaries;
wherein the ratio of component c) to component b) is less than or equal to 0.3:1.
18. A pesticidal composition obtained by diluting a concentrate according to claim 17 into a suitable amount of carrier.
19. The concentrate of claim 12 wherein said one or more other formulation auxiliaries comprise an alkali metal salt, an alkaline earth metal chloride, a surfactant, a thixotropic agent, an antifoaming agent, an antifreezing agent, a preservative, or any combination thereof.
20. The concentrate of claim 12 wherein said one or more other formulation auxiliaries comprise a surfactant, a thixotropic agent, and an antifoaming agent.