A mixture, which comprises (A) thidiazuron (or thidiazuron and diuron), and (B) one or more compounds from the group of the N-phenylsulfonyl(het)arylamides, if appropriate also in salt form, of the formula below: in which R 21 is cyclopropyl and R 22 is H, R 21 is cyclopropyl and R 22 is 5-Cl, R 21 is ethyl and R 22 is H, R 21 is isopropyl and R 22 is 5-Cl or R 21 is isopropyl and R 22 is H; is suitable for use as a defoliant, in particular in crops of cotton.
1. A mixture, which comprises
(A) thidiazuron and
(B) at least one compound from the group of the N-phenylsulfonyl(het)arylamides, if appropriate also in salt form, of the formula below:
in which
R 21 is cyclopropyl and R 22 is H,
R 21 is cyclopropyl and R 22 is 5-Cl,
R 21 is ethyl and R 22 is H,
R 21 is isopropyl and R 22 is 5-Cl or
R 21 is isopropyl and R 22 is H,
wherein a ratio of the component (A) to the component (B) is 1:2 to 1:10.
2. The mixture as claimed in claim 1 which comprises, as component (B), cyprosulfamide.
3. A method for defoliating plants comprising applying a mixture according to claim 1 to a plant.
4. A method as claimed in claim 3 , wherein the plant is a cotton plant.
5. A method as claimed in claim 4 , wherein the cotton plant is a transgenic cotton plant.
6. A defoliant, which comprises
(A) thidiazuron and
(B) at least one compound selected from the group of the N-phenylsulfonyl(het)arylamides, if appropriate also in salt form, of the formula below:
in which
R 21 is cyclopropyl and R 22 is H
R 21 is cyclopropyl and R 22 is 5-Cl,
R 21 is ethyl and R 22 is H,
R 21 is isopropyl and R 22 is 5-Cl or
R 21 is isopropyl and R 22 is H; and
(C) one or more formulation auxiliaries,
wherein a ratio of the component (A) to the component (B) is 1:2 to 1:10.
7. The defoliant as claimed in claim 6 which comprises, as component (B), cyprosulfamide.
8. A method for defoliating a plant comprising treating the plant with the defoliant as defined in claim 6 .
9. The method as claimed in claim 8 , wherein the plant is a cotton plant.
10. The method as claimed in claim 9 , wherein the cotton plant is a transgenic cotton plant.
11. The mixture as claimed in claim 1 , wherein component (B) comprises 4-isopropylaminocarbonyl-N-(2-methoxybenzoyl)benzenesulfonamide.
12. The mixture as claimed in claim 6 , wherein component (B) comprises 4-isopropylaminocarbonyl-N-(2-methoxybenzoyl)benzenesulfonamide.
13. The mixture as claimed in claim 6 , wherein component (C) comprises one or more of the formulation auxiliaries selected from the group consisting of adhesives, wetting agents, dispersants, emulsifiers, penetrants, preservatives, antifreeze agents, solvents, fillers, carriers, colorants, antifoams, evaporation inhibitors, pH regulators, and viscosity regulators.
14. A mixture, consisting essentially of:
(A) thidiazuron and
(B) at least one compound from the group of the N-phenylsulfonyl(het)arylamides, if appropriate also in salt form, of the formula below:
in which
R 21 is cyclopropyl and R 22 is H,
R 21 is cyclopropyl and R 22 is 5-Cl,
R 21 is ethyl and R 22 is H,
R 21 is isopropyl and R 22 is 5-Cl or
R 21 is isopropyl and R 22 is H,
wherein a ratio of the component (A) to the component (B) is 1:2 to 1:10.