Disclosed are compounds of Formula 1, including all geometric and stereoisomers, N oxides, and salts thereof, wherein A, X.sup.1, X.sup.2, X.sup.3 and R.sup.2 are as defined in the disclosure. Also disclosed are compositions containing the compounds of Formula 1 and methods for controlling an invertebrate pest comprising contacting the invertebrate pest or its environment with a biologically effective amount of a compound or a composition of the invention.

##STR00001##

The present invention relates to herbicidally active cinnolinium derivatives of formula (I), as well as to processes and intermediates used for the preparation of such derivatives. The invention further extends to herbicidal compositions comprising such derivatives, as well as to the use of such compounds and compositions in controlling undesirable plant growth: in particular the use in controlling weeds, in crops of useful plants.

The present invention relates to herbicidally active cinnolinium derivatives of formula (I), as well as to processes and intermediates used for the preparation of such derivatives. The invention further extends to herbicidal compositions comprising such derivatives, as well as to the use of such compounds and compositions in controlling undesirable plant growth: in particular the use in controlling weeds, in crops of useful plants.

The present invention provides a compound having an excellent control effect against harmful arthropods, which is represented by formula (I) [wherein A.sup.1 represents CR.sup.1b etc., A.sup.2 represents CR.sup.1c etc., T represents a C1-C10 chain hydrocarbon group which is substituted with one or more halogen atoms etc., Q represents an oxygen atom etc., R.sup.1a, R.sup.1b and R.sup.1c are identical to or different from each other, and each represents a C1-C6 alkyl group etc., R.sup.2 represents a C1-C6 alkyl group etc., R.sup.3 represents a C1-C6 chain hydrocarbon group etc., n is 0, 1 or 2, and q is 0, 1, 2 or 3.],

as well as a composition for controlling harmful arthropod comprising the same compound, and a method for controlling harmful arthropod comprising applying the same compound.

##STR00001##

The present invention provides novel inhibitors of cystathionin gamma synthase (CGS), their use as selective and non-selective herbicides, agricultural and non-agricultural herbicides, herbicides in integrated pest management, herbicides for gardening, clearing waste ground, clearing industrial or constructions sites, clearing railways and railway embankments, pesticide, fungicide, agricultural plant stimulant or antimicrobial agent. Also provided is a method for the control of undesired vegetation or clearing areas from the undesired vegetation comprising applying to the locus of said undesired vegetation, to the undesired plants or to a habitat thereof, a herbicidally effective amount of the compound of the present invention.

The present invention provides novel inhibitors of cystathionin gamma synthase (CGS), their use as selective and non-selective herbicides, agricultural and non-agricultural herbicides, herbicides in integrated pest management, herbicides for gardening, clearing waste ground, clearing industrial or constructions sites, clearing railways and railway embankments, pesticide, fungicide, agricultural plant stimulant or antimicrobial agent. Also provided is a method for the control of undesired vegetation or clearing areas from the undesired vegetation comprising applying to the locus of said undesired vegetation, to the undesired plants or to a habitat thereof, a herbicidally effective amount of the compound of the present invention.

Compounds of the formula (I), wherein the substituents are as defined in claim 1. The invention further relates to herbicidal compositions which comprise a compound of Formula (I) and to the use of compounds of Formula (I) for controlling weeds, in particular in crops of useful plants.

##STR00001##

Compounds of the formula (I), wherein the substituents are as defined in claim 1. The invention further relates to herbicidal compositions which comprise a compound of Formula (I) and to the use of compounds of Formula (I) for controlling weeds, in particular in crops of useful plants.

##STR00001##

Pesticidal mixtures comprising as active compounds 1) 1-[(1RS)-1,2-dimethylpropyl]-N-ethyl-5-methyl-N-pyridazin-4-yl-1H-pyrazole-4-carboxamide and 2) at least one further compound B selected from B.1) Succinate dehydrogenase inhibitors as defined in the specification; B.2) Inhibitors of oxysterol binding protein as defined in the specification; B.3) Inhibitors of complex III at Qi site selected from: a) florylpicoxamid, and b) fenpicox-amid; B.4) Strobilurins as defined in the specification; B.5) Inhibitors of C14-demethylase in sterol biosynthesis as defined in the specification; B.6) Inhibitors of cell division and cytoskeleton as defined in the specification, B.7) Other compounds of unknown mode of action as defined in the specification; and B.8) N-[[2-fluoro-4-[(2S,3S)-2-hydroxy-3-(3,4,5-trichlorophenyl)-3-(trifluoromethyl)pyrrolidin-1-yl]phenyl]methyl]cyclopropanecarboxamide; wherein component 1) and component 2) are present in a weight ratio of from 1000:1 to 1:1000; methods and use of these mixtures for combating invertebrate pests such as insects, arachnids, nematodes and/or harmful fungi in and on plants, and for protecting such plants being infested with pests and/or harmful fungi.

Pesticidal mixtures comprising as active compounds 1) 1-[(1RS)-1,2-dimethylpropyl]-N-ethyl-5-methyl-N-pyridazin-4-yl-1H-pyrazole-4-carboxamide and 2) at least one further compound B selected from B.1) Succinate dehydrogenase inhibitors as defined in the specification; B.2) Inhibitors of oxysterol binding protein as defined in the specification; B.3) Inhibitors of complex III at Qi site selected from: a) florylpicoxamid, and b) fenpicox-amid; B.4) Strobilurins as defined in the specification; B.5) Inhibitors of C14-demethylase in sterol biosynthesis as defined in the specification; B.6) Inhibitors of cell division and cytoskeleton as defined in the specification, B.7) Other compounds of unknown mode of action as defined in the specification; and B.8) N-[[2-fluoro-4-[(2S,3S)-2-hydroxy-3-(3,4,5-trichlorophenyl)-3-(trifluoromethyl)pyrrolidin-1-yl]phenyl]methyl]cyclopropanecarboxamide; wherein component 1) and component 2) are present in a weight ratio of from 1000:1 to 1:1000; methods and use of these mixtures for combating invertebrate pests such as insects, arachnids, nematodes and/or harmful fungi in and on plants, and for protecting such plants being infested with pests and/or harmful fungi.