A mixture, comprising (A) thidiazuron (or thidiazuron and diuron), and (B) one or more compounds from the group of the herbicidal 1,2,4-triazinone, preferably metribuzin and/or metamitron, is suitable for use as a defoliant and/or a composition for reducing regrowth, in particular in crops of cotton.
1. A mixture, comprising
(A) thidiazuron and optionally diuron, and
(B) metribuzin,
wherein the ratio by weight of components (A):(B) is 1:0.1 to 10.
2. The mixture as claimed in claim 1 wherein component (A) comprises thidiazuron and diuron.
3. A mixture as claimed in claim 1 that is capable of defoliating a cotton plant.
4. A mixture as claimed in claim 1 that is capable of reducing the regrowth of a cotton plant.
5. A mixture as claimed in claim 3 , wherein the cotton plant comprises a transgenic cotton plant.
6. A defoliant, comprising
(A) thidiazuron and optionally diuron, and
(B) metribuzin and
(C) at least one formulation auxiliary,
wherein the ratio by weight of components (A):(B) is 1:0.1 to 10.
7. The defoliant as claimed in claim 6 , wherein component (A) comprises thidiazuron and diuron.
8. A method for defoliating a cotton plant comprising treating the plant with a mixture as claimed in claim 1 .
9. A method for reducing the regrowth of a cotton plant comprising treating the plant with a mixture as claimed in claim 1 .
10. The method as claimed in claim 8 , wherein the cotton plant is a transgenic cotton plant.
11. The method as claimed in claim 9 , wherein the cotton plant is a transgenic cotton plant.
12. A method for defoliating a cotton plant and reducing regrowth of a cotton plant, comprising treating the cotton plant with
(A) thidiazuron and optionally diuron, and
(B) metribuzin,
wherein the ratio by weight of components (A):(B) is 1:0.1 to 10.
13. The method according to claim 12 , wherein component (A) and component (B) are applied by successive applications.
14. A method according to claim 12 , wherein component (A) is applied at a rate of 20 to 150 g of a.i/ha, and component (B) is applied at a rate of 5 to 500 g of a.i./ha.