Use of 4-chloroindole-3-acetic acid for controlling unwanted plants
View Patent ↗The present application relates to compositions comprising 4-chloroindole-3-acetic acid (4Cl-IAA) or an analogue thereof, or a combination of the latter, in acid, salt or ester form. For example, such compositions can be used to curb weeds.
1. A method for selectively causing damage or mortality to weed, said method comprising applying on said weed an aqueous composition comprising 4-chloroindole-3-acetic acid (4Cl-IAA), in acid, salt or ester form, wherein the 4Cl-IAA, in acid, salt or ester form, is present in a concentration varying from 1.5 g/L to 40 g/L.
2. The method of claim 1 , wherein said composition is spreaded on said weed.
3. The method of claim 1 , wherein said composition is in the form of a viscous liquid.
4. The method according to claim 1 , wherein the composition further comprises a chelating agent chosen from cyclohexanediaminetetraacetic acid (CDTA), ethylenediamine-N,N′-disuccinic acid (EDDS), EDTA, ethanol diglycine (EDG), HEDTA, methylglycinediacetic acid, glutamicadiacetic acid, trans-1,2-diaminocyclohexane-N,N,N′,N′tetraacetic acid, diethylenetriaminepentaacetic acid (DTPA), iminodisuccinic acid, salts thereof, and combinations thereof.
5. The method according to claim 1 , wherein the 4Cl-IAA, is present, in acid, salt or ester form, in a concentration varying from 2 g/L to 10 g/L.
6. The method according to claim 5 , wherein the composition further comprises a chelating agent chosen from EDDS, EDTA, DTPA, HEDTA, salts thereof and combinations thereof.
7. The method according to claim 1 , wherein said composition further comprises a co-ingredient that is a chelated or non-chelated metal, at a concentration varying from 0.1 to 5% on a weight basis.
8. The method according to claim 1 , wherein said composition further comprises a co-ingredient that is sodium chloride, at a concentration varying from 1 to 36% on a weight basis.
9. The method according to claim 1 , wherein said composition further comprises a co-ingredient that is urea, at a concentration varying from 1 to 50% on a weight basis.
10. The method according to claim 1 , wherein said composition further comprises a co-ingredient is a fatty acid, at a concentration varying from 1 to 20% on a weight basis.
11. The method of claim 1 , wherein said composition is applied on said weed and on a desirable plant for selectively causing an herbicide effect on said weed over said desirable plant.
12. The method of claim 1 , wherein said composition is applied on said weed and on a desirable plant for selectively causing damage or mortality to said weed over said desirable plant.
13. The method of claim 12 , wherein said composition comprises 4-chloroindole-3-acetic acid as a potassium salt.
14. The method of claim 1 , wherein said composition is sprayed on said weed.
15. The method of claim 14 , wherein said potassium salt of 4-chloroindole-3-acetic acid is present in a concentration varying from 2 g/L to 10 g/L.
16. The method of claim 1 , wherein said composition comprises 4-chloroindole-3-acetic acid as a potassium salt.
17. The method of claim 16 , wherein said potassium salt of 4-chloroindole-3-acetic acid is present in a concentration varying from 2 g/L to 10 g/L.
18. A method for selectively causing damage or mortality to weed, said method comprising applying on said weed a composition comprising (i) 4-chloroindole-3-acetic acid (4Cl-IAA), in acid, salt or ester form, and (ii) a chelating agent chosen from EDDS, EDTA, DTPA, HEDTA, salts thereof, and combinations thereof.
19. The method of claim 18 , wherein the 4Cl-IAA, in acid, salt or ester form, is present in an aqueous composition in a concentration varying from 1.5 g/L to 40 g/L.
20. The method according to claim 18 , wherein the 4Cl-IAA, in acid, salt or ester form, is present in said composition at a concentration varying from 1.5 g/L to 40 g/L.
21. The method according to claim 20 , wherein said composition further comprises a surfactant, a preservative, a buffer or combinations thereof.
22. The method according to claim 18 , wherein the 4Cl-IAA, in acid, salt or ester form, is applied at a dose greater than or equal to 0.2 g/m 2 and less than or equal to 0.8 g/m 2 for a spreading application.
23. The method of claim 20 , wherein said composition comprises 4-chloroindole-3-acetic acid as a potassium salt.
24. A method for selectively causing damage or mortality to weed, said method comprising applying on said weed 4-chloroindole-3-acetic acid (4Cl-IAA), in acid, salt or ester form, wherein the 4Cl-IAA, in acid, salt or ester form, is applied at a dose greater than or equal to 0.005 g/plant and less than or equal to 0.1 g/plant for a targeted application.
25. The method of claim 24 , wherein the 4Cl-IAA, in acid, salt or ester form, is applied in the form of a powdered or granular solid.
26. The method of claim 24 , wherein the 4Cl-IAA is further used in combination with a chelating agent.
27. The method according to claim 26 , wherein the chelating agent is chosen from cyclohexanediaminetetraacetic acid (CDTA), ethylenediamine-N,N′-disuccinic acid (EDDS), EDTA, ethanol diglycine (EDG), HEDTA, methylglycinediacetic acid, glutamicadiacetic acid, trans-1,2-diaminocyclohexane-N,N,N′,N′tetraacetic acid, diethylenetriaminepentaacetic acid (DTPA), iminodisuccinic acid, salts thereof, and combinations thereof.