Fungicidal combinations comprising glyoxalic acid methyl ester-O-methyloxime derivatives

Abstract

A method of combating phytopathogenic diseases on crop plants which comprises applying to the crop plants or the locus thereof being infested with said phytopathogenic disease an effective amount of a combination of a) 2-[α{[(α-methyl-3-trifluoromethyl-benzyl)imino]-oxy}-o-tolyl]-glyoxalic acid methyl ester-O methyloxime (I) in association with b) a broad variety of otherplant fungicides is particularly effective in combating or preventing diseases of crop plants. These combinations exhibit synergistic fungicidal activity.

What is claimed is:  
     
         1 . A method of combating phytopathogenic diseases on crop plants which comprises applying to the crop plants or the locus thereof being infested with said phytopathogenic disease, in admixture or separately, an effective amount of a combination of a first component 
 a) 2-[α-{[(α-methyl-3-trifluoromethyl-benzyl)imino]-oxy}-o-tolyl]-glyoxalic acid methyl ester-O-methyloxime (I)    in association with    b) a second component selected from either    an anilide of formula IIB                          wherein R 1  is fluorine or chlorine; or    a carbamate of formula IIC                          wherein X is N or CH, and R 2  is 4-CH 3 , 4-Cl or 2,4-dichloro; or    a compound IID    methyl(2)-2-{2-[6-(trifluoromethyl)pyrid-2-yloxymethyl]-phenyl}-3-methoxyacrylate; or    a compound IIE    (E)-N-methyl-2-[2-(2,5-dimethylphenoxymethyl)phenyl]-2-methoxy-iminoacetamide; or    a compound of formula IIF                          wherein R 3  is methyl or ethyl; or    a (S)-valinamide of formula IIG                          wherein    R 4  is isopropyl, sec.-butyl or tert.-butyl, and    R 5  is 4-chlorophenyl, 4-methylphenyl, 4-methoxyphenyl or β-naphthyl, and    wherein the asymmetric center is preferably (R); or    a (S)-valinamide of formula IIH                          wherein R 6  is isopropyl, sec.-butyl or tert.-butyl, R 7  is halogen, methyl or methoxy and n is 0,1 or 2; or    a compound IIJ    N-methyl-2-[2-{α-methyl-3-(trifluoromethyl)benzyloximinomethyl}phenyl]-2-methoximinoacetamide; or    a compound of formula IIK                          wherein R 8  is halogen or C 1 -C 4 -alkyl, preferably chlorine; or    a compound IIL    N-(3′-(1′-chloro-3-methyl 2′-oxopentan))-3,5-dichloro-4-methylbenzamide; or    a compound IIM    (S)-1-anilino-4-methyl-2-methylthio-4-phenylimidazolin-5-one; or    a compound of formula IIN                          a compound of formula IIP                          a compound IIQ    N-methyl-2-[α-{[(α-methyl-3-trifluoromethyl-benzyl)imino]-oxy}-o-tolyl]-glyoxalic acidamide-O-methyloxime.    
     
     
         2 . A method according to  claim 1  wherein the components b) is selected from the compounds of formula IIB, IIG, IIH, IIK and IIL.  
     
     
         3 . A method according to  claim 1  wherein the component b) is selected from the group comprising IIC, IID, IIE, IIF and IIJ.  
     
     
         4 . A method according to  claim 1  wherein the component b) is selected from the group comprising IIM, IIN, IIP or IIQ.  
     
     
         5 . A method according to any of  claims 1  to  4  wherein the components a) and b) are applied in a quantity producing a synergistic disease controlling effect, specially a fungicidal effect.  
     
     
         6 . A fungicidal composition comprising a fungicidally effective combination of 
 a) a compound I according to  claim 1  in association with    b) either a compound of formula IIB, or    a compound of formula IIC, or    a compound IID, or    a compound IIE, or    a compound of formula IIF, or    a compound of formula IIG, or    a compound of formula IIH, or    a compound IIJ, or    a compound of formula IIK, or    a compound IIL, or    a compound of formula IIM, or    a compound of formula IIN, or    a compound of formula IIP, or    a compound IIQ    as defined in  claim 1 .    
     
     
         7 . A composition according to  claim 6  the weight ratio of a) to b) is between 10:1 and 1:20.  
     
     
         8 . A composition according to  claim 6  wherein the component b) is selected from the group comprising IIB, IIG, IIH, IIK and IIL.  
     
     
         9 . A composition according to  claim 6  wherein the component b) is selected from the group comprising IIC, IID, IIE, IIF and IIJ.  
     
     
         10 . A composition according to  claim 6  wherein the component b) is selected from the group comprising IIM, IIN, IIP and IIQ.