A method of controlling phytopathogenic diseases on useful plants or on propagation material thereof, which comprises applying to the useful plants, the locus thereof or propagation material thereof a combination of components (A) and (B) in a synergistically effective amount, wherein component (A) is a compound of formula I

compound of formula I

##STR00001##

wherein

R is hydrogen or methoxy;

Q is

##STR00002##

R.sub.1 is hydrogen, halogen or C.sub.1-C.sub.6alkyl;

R.sub.2 is hydrogen, halogen, C.sub.1-C.sub.6alkyl, C.sub.2-C.sub.6alkenyl, C.sub.3-C.sub.6alkinyl, C.sub.3-C.sub.6cycloalkyl-C.sub.3-C.sub.6alkinyl, halophenoxy, halophenyl-C.sub.3-C.sub.6alkinyl, C(C.sub.1-C.sub.4alkyl)=NO—C.sub.1-C.sub.4alkyl, C.sub.1-C.sub.6haloalkyl,

C.sub.1-C.sub.6haloalkoxy, C.sub.2-C.sub.6haloalkenyl, or C.sub.2-C.sub.6haloalkenyloxy;

R.sub.3 is hydrogen, halogen, C.sub.1-C.sub.6alkyl;

R.sub.4, R.sub.5 and R.sub.6, independently from each other, are hydrogen, halogen or -≡-R.sub.7 with the proviso that at least one of R.sub.4, R.sub.5 and R.sub.6 is different from hydrogen;

R.sub.7 is hydrogen, C.sub.1-C.sub.6alkyl, C.sub.1-C.sub.6haloalkyl or C.sub.1-C.sub.4alkoxyalkyl; and

R.sub.8 is hydrogen or methoxy;

and agrochemically acceptable salts/isomers/structural isomers/stereoisomers/diastereoisomers/enantiomers/tautomers and N-oxides of those compounds; and component (B) is a compound selected from compounds known for their fungicidal and/or insecticidal activity, is particularly effective in controlling or preventing fungal diseases of useful plants.

A fungicidal composition containing a fungicidally effective amount of the compound of Formula I:

##STR00001##

5-fluoro-4-imino-3-methyl-1-tosyl-3,4-dihydropyrimidin-2(1H)-one, and at least one fungicide to provide synergistic control of selected fungi wherein the at least one fungicide is a fungicidal sterol biosynthesis-inhibitor.

A fungicidal composition containing a fungicidally effective amount of the compound of Formula I:

##STR00001##

5-fluoro-4-imino-3-methyl-1-tosyl-3,4-dihydropyrimidin-2(1H)-one, and at least one fungicide to provide synergistic control of selected fungi wherein the at least one fungicide is a fungicidal sterol biosynthesis-inhibitor.

A fungicidal composition containing a fungicidally effective amount of the compound of Formula I:

##STR00001##

5-fluoro-4-imino-3-methyl-1-tosyl-3,4-dihydropyrimidin-2(1H)-one, and at least one fungicide to provide synergistic control of selected fungi wherein the at least one fungicide is a fungicidal sterol biosynthesis-inhibitor.

A fungicidal composition containing a fungicidally effective amount of the compound of Formula I:

##STR00001##

5-fluoro-4-imino-3-methyl-1-tosyl-3,4-dihydropyrimidin-2(1H)-one, and at least one fungicide to provide synergistic control of selected fungi, wherein the at least one fungicide is a succinate dehydrogenase-inhibitor.

A fungicidal composition containing a fungicidally effective amount of the compound of Formula I:

##STR00001##

5-fluoro-4-imino-3-methyl-1-tosyl-3,4-dihydropyrimidin-2(1H)-one, and at least one fungicide to provide synergistic control of selected fungi, wherein the at least one fungicide is a succinate dehydrogenase-inhibitor.

A fungicidal composition containing a fungicidally effective amount of the compound of Formula I:

##STR00001##

5-fluoro-4-imino-3-methyl-1-tosyl-3,4-dihydropyrimidin-2(1H)-one, and at least one fungicide to provide synergistic control of selected fungi wherein the at least one fungicide is a multi-site inhibitor or a strobilurin inhibitor.

A fungicidal composition containing a fungicidally effective amount of the compound of Formula I:

##STR00001##

5-fluoro-4-imino-3-methyl-1-tosyl-3,4-dihydropyrimidin-2(1H)-one, and at least one fungicide to provide synergistic control of selected fungi wherein the at least one fungicide is a multi-site inhibitor or a strobilurin inhibitor.

A fungicidal composition containing a fungicidally effective amount of the compound of Formula I:

##STR00001##

5-fluoro-4-imino-3-methyl-1-tosyl-3,4-dihydropyrimidin-2(1H)-one, and at least one fungicide to provide synergistic control of selected fungi wherein the at least one fungicide is a multi-site inhibitor or a strobilurin inhibitor.

An object of the present invention is to provide novel means and method for efficiently controlling a harmful organism that is difficult to control by treatment with a single agrochemical compound. This object can be achieved by a harmful organism control composition comprising an active ingredient being a compound represented by the general formula (I):

##STR00001##

{wherein R.sup.1 represents a (C.sub.1-C.sub.6) alkyl group, R.sup.2 represents a halogen atom, a halo (C.sub.1-C.sub.6) alkyl group, or a (C.sub.3-C.sub.6) cycloalkyl group, R.sup.3 represents a hydrogen atom or a (C.sub.1-C.sub.6) alkylcarbonyl group, R.sup.4 represents a halogen atom, a (C.sub.1-C.sub.6) alkoxy group, or a (C.sub.1-C.sub.6) alkoxycarbonyl group, R.sup.5 represents a halogen atom, a (C.sub.1-C.sub.6) alkyl group, a halo (C.sub.1-C.sub.6) alkyl group, a halo (C.sub.1-C.sub.6) alkoxy group, or a (C.sub.3-C.sub.6) cycloalkyl group, and m represents 0, 1, or 2} or a salt thereof; and another active ingredient being one or more other compounds having harmful organism control activity or salts thereof as well as by a method for using the harmful organism control composition.