Herbicide/safener combination

Abstract

A composition comprising (A) one or more compounds of the formula (I) or salts thereof, in which the individual indices have the meaning defined in the description and (B) one or more safeners is described.

1 . A herbicidal composition comprising
 (A) 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropyridine-2-carboxylate or a salt, ester, acyl hydrazide, imidate, thioimidate, amidine, amide, orthoester, acyl cyanide, acyl halide, thio ester, thione ester, dithiol ester, or nitrile derivative thereof that (a) does not impair the herbicidal effect of the 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropyridine-2-carboxylate or derivative thereof and (b) is or can be hydrolyzed, oxidized, or metabolized in plants or in the earth to give 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropyridine-2-carboxylate, and   (B) one or more safeners selected from the group consisting of cyprosulfamide and 1-[4-(N-2-methoxybenzoylsulfamoyl)phenyl]-3-methylurea.   
     
     
         2 . A method for controlling undesired plants, in which
 (A) 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropyridine-2-carboxylate or a salt, ester, acyl hydrazide, imidate, thioimidate, amidine, amide, orthoester, acyl cyanide, acyl halide, thio ester, thione ester, dithiol ester, or nitrile derivative thereof that (a) does not impair the herbicidal effect of the 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropyridine-2-carboxylate or derivative thereof and (b) is or can be hydrolyzed, oxidized, or metabolized in plants or in the earth to give 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropyridine-2-carboxylate, and   (B) one or more safeners selected from the group consisting of cyprosulfamide and 1-[4-(N-2-methoxybenzoylsulfamoyl)phenyl]-3-methylurea   are applied together or separately, to the undesired plants in the presence of crop plants, crop plant seed material, or the area on which the crop plants grow.   
     
     
         3 . The method as claimed in  claim 2 , wherein the crop plants are transgenic or are tolerant owing to selective cultivation. 
     
     
         4 . The composition as claimed in  claim 1  comprising an antidotically effective amount of one or more of said safeners, wherein an antidotically effective amount is an amount of one or more safeners which is suitable for reducing the phytotoxic effect on crop plants of 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyI)-5-fluoropyridine-2-carboxylate or a salt, ester, acyl hydrazide, imidate, thioimidate, amidine, amide, orthoester, acyl cyanide, acyl halide, thio ester, thione ester, dithiol ester, or nitrile derivative thereof that (a) does not impair the herbicidal effect of the 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropyridine-2-carboxylate or derivative thereof and (b) is or can be hydrolyzed, oxidized, or metabolized in plants or in the earth to give 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropyridine-2-carboxylate. 
     
     
         5 . The method as claimed in  claim 2 , wherein the application rate of (A) is 0.1 to 800 g of a.i./ha and the application rate of (B) is 0.001 to 5 kg of a.i./ha. 
     
     
         6 . The method as claimed in  claim 2 , wherein the application rate of (A) is 10 to 400 g of a.i./ha and the application rate of (B) is 0.005 to 2.5 kg of a.i./ha. 
     
     
         7 . The method as claimed in  claim 2 , wherein the application rate of (A) is 25 to 100 g of a.i./ha and the application rate of (B) is 50 to 200 g of a.i./ha. 
     
     
         8 . The composition as claimed in  claim 1 , wherein the weight ratio of (A) to (B) is 1:1000 to 1000:1. 
     
     
         9 . The composition as claimed in  claim 1 , wherein the safener is cyprosulfamide. 
     
     
         10 . The composition as claimed in  claim 1 , wherein the safener is 1-[4-(N-2-methoxybenzoylsulfamoyl)phenyl]-3-methylurea.