Herbicidal composition

Abstract

A herbicidal composition that, in addition to comprising customary inert formulation adjuvants, comprises either a) a compound of formula I wherein R is C 1 -C 2 alkyl or chlorine, R 1 is hydrogen or C 1 -C 4 alkyl and R 2 is C 1 -C 4 alkyl, or an agronomically acceptable salt of such a compound, and b) a synergistically effective amount of one or more compounds of formulae 2.1 to 2.51 and also an amount, effective for herbicide antagonism, of a safener, or a) a compound of formula I and b) an amount, effective for herbicide antagonism, of a safener.

1 . A selectively herbicidal composition that, in addition to comprising inert formulation adjuvants, comprises as active ingredient a mixture of 
 a) a herbicidally effective amount of a compound of formula I                          wherein R is C 1 -C 2 alkyl or chlorine, R 1  is hydrogen or C 1 -C 4 alkyl and R 2  is C 1 -C 4 alkyl, or an agronomically acceptable salt of such a compound, and    b) optionally, a synergistically effective amount of one or more compounds selected from a compound of formula 2.1                          wherein R 51  is CH 2 —OMe, ethyl or hydrogen; R 52  is hydrogen or R 51  and R 52  together are the group —CH═CH—CH═CH—;    and a compound of formula 2.2                          wherein R 53  is ethyl, R 54  is methyl or ethyl and R 55  is —CH(Me)—CH 2 OMe, <S>—CH(Me)—CH 2 OMe, CH 2 OMe or CH 2 O—CH 2 CH 3 ;    and a compound of formula 2.3                          wherein R 56  is CH(Me)—CH 2 OMe or <S>CH(Me)—CH 2 OMe;    and a compound of formula 2.4                          wherein R 57  is chlorine, methoxy or methylthio, R 58  is ethyl and R 59  is ethyl, isopropyl, —C(CN)(CH 3 )—CH 3  or tert-butyl;    and a compound of formula 2.5                          wherein R 60  is ethyl or n-propyl, R 61  is COO −  ½ Ca ++ , —CH 2 —CH(Me)S—CH 2 CH 3  or the group                          and X is oxygen, N—O—CH 2 CH 3  or N—O—CH 2 CH═CH—Cl;    and a compound of formula 2.6                          wherein R 62  is hydrogen, methoxy or ethoxy, R 63  is hydrogen, methyl, methoxy or fluorine, R 64  is COOMe, fluorine or chlorine, R 65  is hydrogen or methyl, Y is methine, C—F or nitrogen, Z is methine or nitrogen and R 66  is fluorine or chlorine;    and a compound of formula 2.7                          wherein R 67  is hydrogen or —C(O)—S-n-octyl;    and a compound of formula 2.8                          wherein R 68  is either bromine or iodine;    and a compound of formula 2.9                          wherein R 69  is chlorine or nitro;    and a compound of formula 2.10                          wherein R 70  is fluorine or chlorine and R 71  is —CH 2 —CH(Cl)—COOCH 2 CH 3  or —NH—SO 2 Me;    and a compound of formula 2.11                          wherein R 72  is trifluoromethyl or chlorine;    and a compound of formula 2.12                          wherein R 73  is NH 2  or <S>NH 2 ;    and a compound of formula 2.13                          wherein Y 2  is nitrogen, methine, NH—CHO or N—Me, Y 1  is nitrogen, methine or C—I, Y 3  is methine, Y 4  is methine or Y 3  and Y 4  together are sulfur or C—Cl, Y 5  is nitrogen or methine, Y 6  is methyl, difluoromethoxy, trifluoromethyl or methoxy, Y 7  is methoxy or difluoromethoxy and R 74  is CONMe 2 , COOMe, COOC 2 H 5 , trifluoromethyl, CH 2 —CH 2 CF 3  or SO 2 CH 2 CH 3 , or a sodium salt thereof;    and the compound of formula 2.13.c                          and the compound of formula 2.14                          and the compound of formula 2.15                          and the compound of formula 2.16                          and the compound of formula 2.17                          and the compound of formula 2.18                          and the compound of formula 2.19                          and the compound of formula 2.20                          and the compound of formula 2.21                          and the compound of formula 2.22                          and the compound of formula 2.23                          and the compound of formula 2.24                          and the compound of formula 2.25                          and the compound of formula 2.26                          and the compound of formula 2.27                          and the compound of formula 2.28                          and the compound of formula 2.29                          and the compound of formula 2.30                          and the compound of formula 2.31                          and the compound of formula 2.32                          and the compound of formula 2.33                          and the compound of formula 2.34                          and the compound of formula 2.35                          and the compound of formula 2.36                          and the compound of formula 2.37                          and the compound of formula 2.38                          and the compound of formula 2.39                          and the compound of formula 2.40                          and the compound of formula 2.41                          and the compound of formula 2.42                          and the compound of formula 2.43                          and the compound of formula 2.44                          and the compound of formula 2.45                          and the compound of formula 2.46                          and the compound of formula 2.47                          and the compound of formula 2.48                          and the compound of formula 2.49                          and the compound of formula 2.50                          and the compound of formula 2.51                          and    c) an amount, effective for herbicide antagonism, of a compound selected from the compound of formula 3.1                          and the compound of formula 3.2                          and the compound of formula 3.3                          and the compound of formula 3.4                          and the compound of formula 3.5                          and the compound of formula 3.6                          and the compound of formula 3.7                          and the compound of formula 3.8                          and formula 3.9      Cl 2 CHCON(CH 2 CH═CH 2 ) 2    (3.9),    and of formula 3.10                          and of formula 3.11                          and of formula 3.12                          and its ethyl ester,    and of formula 3.13                          and of formula 3.14                          and of formula 3.15                          
   
   
       2 . A method of controlling undesired plant growth in crops of useful plants, which comprises allowing a herbicidally effective amount of a composition according to  claim 1  to act on the crop plant or the locus thereof.  
   
   
       3 . A method according to  claim 2 , wherein the crop plant is maize or sugar cane.  
   
   
       4 . A method according to  claim 2 , wherein the crops of useful plants are treated with said composition at rates of application corresponding to a total amount of active ingredient of from 1 to 5000 g per hectare.  
   
   
       5 . A selectively herbicidal composition that, in addition to comprising customary inert formulation adjuvants, such as carriers, solvents and wetting agents, comprises as active ingredient a mixture of 
 a) a herbicidally effective amount of a compound of formula I according to  claim 1  and    b) an amount, effective for herbicide antagonism, of a compound selected from the compound of formula 3.1                          and the compound of formula 3.2                          and the compound of formula 3.3                          and the compound of formula 3.4                          and the compound of formula 3.5                          and the compound of formula 3.6                          and the compound of formula 3.7                          and the compound of formula 3.8                          and of formula 3.9      Cl 2 CHCON(CH 2 CH═CH 2 ) 2    (3.9),    and of formula 3.10                          and of formula 3.11                          and of formula 3.12                          and its ethyl ester,    and of formula 3.13                          and of formula 3.14                          and of formula 3.15                          
   
   
       6 . A method for the selective control of weeds and grasses in crops of useful plants, which comprises treating the useful plants, seeds or cuttings thereof, or the area of cultivation thereof, with a herbicidally effective amount of a composition according to  claim 5 .  
   
   
       7 . A method according to  claim 6 , wherein the rate of application of herbicides is from 1 to 5000 g/ha and the rate of application of safener is from 0.001 to 0.5 kg/ha.  
   
   
       8 . A method according to  claim 6 , wherein the useful plant crop is maize or sugar cane.