The present invention belongs to the technical field of pesticides, and in particular relates to a pyridazinol compound, a derivative thereof, a preparation method therefor, a herbicidal composition and the use thereof. The pyridazinol compound is as represented by general formula I,

##STR00001##

wherein X represents

##STR00002##

and the ring is an unsubstituted or substituted aryl or unsubstituted or substituted heterocyclyl containing a carbon atom at the 1-position; Y represents haloalkyl; and Z represents halogen, cyano, hydroxy, etc. The derivative refers to an agriculturally acceptable derivative of the hydroxyl group at the 4-position of the pyridazine ring in the general formula I, including a salt, an ester, an oxime, a hydroxylamine and an ether derivative, etc. The compound, the derivative thereof and the composition thereof have good herbicidal activity and crop safety.

The present invention provides a method for controlling a soybean rust fungus having an amino acid substitution of F129L on mitochondrial cytochrome b protein. According to the present invention, a compound represented by formula (I) [wherein R.sup.1 represents a C1-C3 chain hydrocarbon group and so on, n is 0, 1, 2 or 3, and when is 2 or 3, a plural of R.sup.2 may be identical to or different from each other, and R.sup.2 represents a C1-C3 chain hydrocarbon group and so on, Q represents a group represented by Q1 (where • represents a binding site to a benzene ring) and so on, L.sup.1 represents CH.sub.2 or an oxygen atom, and E represents a C1-C6 alkyl group and so on.] can use to control a soybean rust fungus having an amino acid substitution of F129L on mitochondrial cytochrome b protein.

##STR00001##

##STR00002##

##STR00003##

##STR00004##

The present invention relates to compounds which are of use in the field of agriculture as fungicides.

A carbamate compound represented by formula (I),

wherein, R.sup.1 represents a hydrogen atom or a C1-C3 alkyl group; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each independently represents a hydrogen atom, a halogen atom, a C1-C3 alkyl group optionally having one or more halogen atoms, a C3-C4 cycloalkyl group optionally having one or more halogen atoms or a C1-C3 alkoxy group optionally having one or more halogen atoms; Z.sup.1 represents a C1-C3 alkyl group; and m represents any one of integers from 1 to 3;
has an excellent effect of controlling plant diseases.

##STR00001##

A carbamate compound represented by formula (I),

wherein, R.sup.1 represents a hydrogen atom or a C1-C3 alkyl group; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each independently represents a hydrogen atom, a halogen atom, a C1-C3 alkyl group optionally having one or more halogen atoms, a C3-C4 cycloalkyl group optionally having one or more halogen atoms or a C1-C3 alkoxy group optionally having one or more halogen atoms; Z.sup.1 represents a C1-C3 alkyl group; and m represents any one of integers from 1 to 3;
has an excellent effect of controlling plant diseases.

##STR00001##

Novel active compound combinations comprising a carboxamide of the general formula (I) (group 1) ##STR00001##
in which
A, R.sup.1, R.sup.2 and R.sup.3 are as defined in the description,
and the active compound groups (2) to (23) listed in the description have very good fungicidal properties.

Novel active compound combinations comprising a carboxamide of the general formula (I) (group 1) ##STR00001##
in which
A, R.sup.1, R.sup.2 and R.sup.3 are as defined in the description,
and the active compound groups (2) to (23) listed in the description have very good fungicidal properties.

The present invention provides a substituted pyridine compound of the formula I

##STR00001##

or an agriculturally suitable salt or N-oxide thereof, wherein the variables in the formula I are defined as in the description. Substituted pyridine compounds of formula I are useful as herbicides.

The present invention provides a substituted pyridine compound of the formula I

##STR00001##

or an agriculturally suitable salt or N-oxide thereof, wherein the variables in the formula I are defined as in the description. Substituted pyridine compounds of formula I are useful as herbicides.

A carbamate compound represented by formula (I),

wherein, R.sup.1 represents a hydrogen atom or a C1-C3 alkyl group; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each independently represents a hydrogen atom, a halogen atom, a C1-C3 alkyl group optionally having one or more halogen atoms, a C3-C4 cycloalkyl group optionally having one or more halogen atoms or a C1-C3 alkoxy group optionally having one or more halogen atoms; Z.sup.1 represents a C1-C3 alkyl group; and m represents any one of integers from 1 to 4;
has an excellent effect of controlling plant diseases.

##STR00001##