WATER-SOLUBLE CONCENTRATE COMPOSITION

1 . A water-soluble concentrate composition comprising:

a) an agricultural active ingredient selected from phenoxy acid salts, wherein the phenoxy acid salt is selected from ammonium salts, alkaline earth or alkali metal salts or the combination thereof;

b) a co-solvent selected from the compound of formula (I)

R 1 OOC—R 2 —CONR 3 R 4   (I)

wherein

R 1 is a C 1 -C 3 alkyl;

R 2 is a divalent linear or branched C 1 -C 6 alkyl;

R 3 and R 4 are each independently methyl or ethyl groups; and

c) an adjuvant selected from the phosphate mono- or diesters of formula (II)

(R 5 O) m —P(═O)(OM) n   (II)

wherein

R 5 is an optionally polyalkoxylated alkyl group, m and n are equal to 1 or 2, provided that the sum of m and n is equal to 3, and

M is a hydrogen atom, alkaline metal cation, alkaline earth metal cation or ammonium ion.

2 . The water-soluble concentrate composition according to claim 1 , wherein the phenoxy acid is the one or more selected from the group consisting of 2-methyl-4-chlorophenoxyacetic acid (MCPA), 4-(4-chloro-o-tolyloxy)butyric acid (MCPB), methylchlorophenoxypropionic acid (MCPP), 2,4-dichlorophenoxyacetic acid (2,4-D), 4-(2,4-dichlorophenoxy)butyric acid (2,4-DB), 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), Dichlorprop, and Fenoprop.

3 . The water-soluble concentrate composition according to claim 2 , wherein the phenoxy acid is the one or more selected from the group consisting of 2-methyl-4-chlorophenoxyacetic acid (MCPA) and 2,4-dichlorophenoxyacetic acid (2,4-D).

4 . The water-soluble concentrate composition according to claim 1 , wherein R 2 is butylene group.

5 . The water-soluble concentrate composition according to claim 1 , wherein the compound of formula (I) is a blend comprising:

a compound of formula (I) wherein R 2 is —CH(CH 2 —CH 3 )—CH 2 —,

a compound of formula (I) wherein R 2 is —CH 2 —CH(CH 2 —CH 3 )—,

a compound of formula (I) wherein R 2 is —CH(CH 3 )—CH 2 —CH 2 —, and

a compound of formula (I) wherein R 2 is —CH 2 —CH 2 —CH(CH 3 )—.

6 . The water-soluble concentrate composition according to claim 1 , wherein R 5 is an optionally ethoxylated C 4 -C 12 alkyl.

7 . The water-soluble concentrate composition according to claim 1 , wherein the agricultural active ingredient has a load of greater than 800 g/l, based on the total volume of the water-soluble concentrate composition.

8 . The water-soluble concentrate composition according to claim 7 , wherein the total amount of the component b) and c) is in the range from 0.5 to 7.5 wt. %, based on the total weight of the water-soluble concentrate composition.

9 . The water-soluble concentrate composition according to claim 1 , wherein the water-soluble concentrate composition further comprises another adjuvant selected from

d) a betaine compound of the formula (III):

R 6 CONH—R 7 —N + —(R 8 R 9 )—CH 2 COO—  (III)

wherein

R 6 is a linear or branched C 3 -C 30 alkyl;

R 7 is a divalent linear or branched C 1 -C 4 alkyl;

R 8 and R 9 each are independently C 1 -C 3 alkyl.

10 . The water-soluble concentrate composition according to claim 9 , wherein the component d) has an amount ranging from 0.1 to 10 wt. %, based on the total weight of the water-soluble concentrate composition.

11 . A dilution prepared by diluting the water-soluble concentrate composition according to claim 1 with water for 10 to 2000 times.

12 . A method of controlling the growth of unwanted plants, comprising a step of applying to the plants or to the locus of unwanted plant an effective amount of the dilution according to claim 11 .