Concentrate herbicidal composition

• US 6,165,939 A
• Filed: 03/08/1999
• Issued: 12/26/2000
• Est. Priority Date: 03/09/1998
• Status: Expired due to Term

• Current Assignee: Monsanto Technology LLC (Bayer AG)
• Original Assignee: Monsanto Company (Bayer AG)
• Inventors: Carter, Deborah J., Agbaje, Henry E., Brinker, Ronald J.
• Primary Examiner(s): CLARDY, S
• Application Number:
  US09/264,591
• Time in Patent Office: 659 Days
• Field of Search: 504/105, 504/107, 504/128
• US Class Current: 504/105
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 25/04 Dispersions, emulsions, suspoemulsions, suspension concentrates or gels foams A01N25/16
• CPC Class Codes: A01N 43/70 Diamino—1,3,5—triazines with only one oxygen, sulfur or halogen atom or only one cyano, thiocyano (—SCN), cyanato (—OCN) or azido (—N3) group directly attached to a ring carbon atom
• CPC Class Codes: A01N 57/20 containing acyclic or cycloaliphatic radicals

Abstract

There is provided a concentrate herbicidal composition comprising a first herbicide selected from glyphosate and glufosinate, a second herbicide that is a chloroacetamide, e.g., acetochlor or metolachlor, and a third herbicide that is a triazine, e.g., atrazine, wherein the composition is a suspoemulsion having an aqueous phase, an oil phase, and particles dispersed in the aqueous and/or oil phases, and is stabilized by a stabilizing amount of one or more emulsifiers. Also provided is a method of use of a composition of the invention for killing or controlling weeds in a field.

Claims

1. A concentrate herbicidal composition comprising a first herbicide selected from glyphosate and glufosinate, a second herbicide that is a chloroacetamide, and a third herbicide that is a triazine, wherein the composition is a suspoemulsion having an aqueous phase, an oil phase, and particles dispersed in the aqueous and/or oil phases, and is stabilized by a stabilizing amount of one or more emulsifiers.

2. A composition of claim 1 wherein said first herbicide is selected from the sodium, potassium, ammonium, dimethylammonium, isopropylammonium, monoethanolammonium and trimethylsulfonium salts of glyphosate.

3. A composition of claim 1 wherein said first herbicide is the ammonium salt of glufosinate.

4. A composition of claim 1 wherein

(a) said first herbicide is selected from the sodium, potassium, ammonium, dimethylammonium, isopropylammonium, monoethanolammonium and trimethylsulfonium salts of glyphosate;

(b) said chloroacetamide herbicide is acetochlor;

(c) said triazine herbicide is atrazine; and

(d) said emulsifiers comprise one or more emulsifiers selected from ethoxylated amines, alkyl ether sulfates, phosphate esters, sorbitan derivatives, alkylphenols, and block copolymers of propylene oxide and ethylene oxide.

5. A composition of claim 1 wherein said triazine herbicide is selected from ametryn, atrazine, cyanazine, desmetryn, dimethametryn, prometon, prometryn, propazine, simazine, simetryn, terbumetron, terbuthylazine, terbutryn and trietazine.

6. A composition of claim 5 wherein said triazine herbicide is atrazine.

7. A composition of claim 6 wherein said chloroacetamide herbicide is acetochlor.

8. A composition of claim 6 wherein said chloroacetamide herbicide is metolachlor.

9. A composition of claim 1 wherein said chloroacetamide herbicide is selected from acctochlor, alachlor, butachlor, dimethachlor, dimethenamid, metazachlor, metolachlor, pretilachlor, propachlor, propisochlor and thenylchlor.

10. A composition of claim 9 wherein the chloroacetamide herbicide is acetochlor.

11. A composition of claim 10 having no substantial amount of solvent for said acetochlor.

12. A composition of claim 10 that further comprises a safener in an amount effective to reduce injury to crop plants caused by said acetochlor.

13. A composition of claim 12 wherein said safener is furilazole.

14. A composition of claim 9 wherein the chloroacetamide herbicide is metolachlor.

15. A composition of claim 14 having no substantial amount of solvent for said metolachlor.

16. A composition of claim 14 that further comprises a safener in an amount effective to reduce injury to crop plants caused by said metolachlor.

17. A composition of claim 16 wherein said safener is selected from benoxacor, fenclorim, flurazole, fluxofenim, furilazole and oxabetrinil.

18. A composition of claim 17 wherein said safener is benoxacor or furilazole, and wherein said metolachlor and said safener are present in a ratio by weight of about 5:

1 to about 100;

1.

19. A method of controlling weeds in a field, comprising diluting a composition of claim 7 in a suitable volume of water in a spray tank to form a spray composition, and applying said spray composition at a time T₀ by means of a sprayer fed from the spray tank to a soil surface in the field and to foliage of weeds that have emerged above the soil surface, whereby (i) said emerged weeds are killed or controlled and (ii) emergence of weeds that would otherwise emerge during a period of about 10 days immediately following To is inhibited.

20. A method of controlling weeds in a field, comprising diluting a composition of claim 1 in a suitable volume of water in a spray tank to form a spray composition, and applying said spray composition at a time T₀ by means of a sprayer fed from the spray tank to a soil surface in the field and to foliage of weeds that have emerged above the soil surface, whereby (i) said emerged weeds are killed or controlled and (ii) emergence of weeds that would otherwise emerge during a period of about 10 days immediately following To is inhibited.

21. A method of claim 20 wherein the spray composition is applied to a field in which no crop is planted either shortly before or shortly after application.

22. A method of claim 20 wherein a crop is planted in the field within a period of time from shortly before T₀ until about 30 days after To.

23. A method of claim 22 wherein said crop is corn.

24. A method of claim 20 wherein the spray composition is applied to foliage of crop and weed plants and to the soil surface, and wherein said crop has tolerance of herbicidal activity of the foliar-active herbicide.

25. A method of claim 24 wherein said crop has been bred by methods involving genetic transformation.

26. A method of claim 25 wherein said crop is corn.