Contacting a plant with tetrahydropyridizin (THP), a compound including at least one of 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid or its salts or 1-methyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid or its salts, to plants can cause an increase in parameters such as germination, seedling emergence, growth, drought tolerance and recovery, yield, rhizobia induced root nodulation as compared to untreated wild type plants. 1-Methyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid or its salts is chemically the simplest 1-alkyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid and as such is an example showing the effectiveness of a 1-alkyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid. Higher series derivatives such as 1-alkyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acids also induce beneficial effects on treated plants.

Contacting a plant with tetrahydropyridizin (THP), a compound including at least one of 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid or its salts or 1-methyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid or its salts, to plants can cause an increase in parameters such as germination, seedling emergence, growth, drought tolerance and recovery, yield, rhizobia induced root nodulation as compared to untreated wild type plants. 1-Methyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid or its salts is chemically the simplest 1-alkyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid and as such is an example showing the effectiveness of a 1-alkyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid. Higher series derivatives such as 1-alkyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acids also induce beneficial effects on treated plants.

Contacting a plant with tetrahydropyridizin (THP), a compound including at least one of 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid or its salts or 1-methyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid or its salts, to plants can cause an increase in parameters such as germination, seedling emergence, growth, drought tolerance and recovery, yield, rhizobia induced root nodulation as compared to untreated wild type plants. 1-Methyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid or its salts is chemically the simplest 1-alkyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid and as such is an example showing the effectiveness of a 1-alkyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acid. Higher series derivatives such as 1-alkyl 6-oxo-1,4,5,6-tetrahydropyridizin-3-carboxylic acids also induce beneficial effects on treated plants.

A heterocyclic compound is represented by formula (I): ##STR00001##
in which R.sup.2 represents a C1-C6 alkyl group optionally having one or more halogen atoms, n is 0, R.sup.3 represents a C1-C6 chain hydrocarbon group optionally having one or more substituents selected from Group B, q is 0, Het represents a group represented by the formulae Het 1 or Het 2, A.sup.1 represents a nitrogen atom, and Q.sup.2 represents an oxygen atom. The compound has excellent efficacy for controlling harmful arthropods. A composition is provided which contains the compound of formula (I) and one or more additional ingredients.

A heterocyclic compound is represented by formula (I): ##STR00001##
in which R.sup.2 represents a C1-C6 alkyl group optionally having one or more halogen atoms, n is 0, R.sup.3 represents a C1-C6 chain hydrocarbon group optionally having one or more substituents selected from Group B, q is 0, Het represents a group represented by the formulae Het 1 or Het 2, A.sup.1 represents a nitrogen atom, and Q.sup.2 represents an oxygen atom. The compound has excellent efficacy for controlling harmful arthropods. A composition is provided which contains the compound of formula (I) and one or more additional ingredients.

A heterocyclic compound is represented by formula (I): ##STR00001##
in which R.sup.2 represents a C1-C6 alkyl group optionally having one or more halogen atoms, n is 0, R.sup.3 represents a C1-C6 chain hydrocarbon group optionally having one or more substituents selected from Group B, q is 0, Het represents a group represented by the formulae Het 1 or Het 2, A.sup.1 represents a nitrogen atom, and Q.sup.2 represents an oxygen atom. The compound has excellent efficacy for controlling harmful arthropods. A composition is provided which contains the compound of formula (I) and one or more additional ingredients.

The present invention relates to herbicidal combinations and their use in controlling plants or inhibiting plant growth. In particular, herbicidal combinations comprising at least one pyridazine derivative of Formula (I) as defined herein, in combination with at least one further herbicide that is a compound of Formula (II) as defined herein.

##STR00001##

The present invention relates to herbicidal combinations and their use in controlling plants or inhibiting plant growth. In particular, herbicidal combinations comprising at least one pyridazine derivative of Formula (I) as defined herein, in combination with at least one further herbicide that is a compound of Formula (II) as defined herein.

##STR00001##

The present invention relates to herbicidal combinations and their use in controlling plants or inhibiting plant growth. In particular, herbicidal combinations comprising at least one pyridazine derivative of Formula (I) as defined herein, in combination with at least one further herbicide that is a compound of Formula (II) as defined herein.

##STR00001##

The invention relates to an aqueous agrochemical composition comprising a) suspended particles of an active ingredient; and b) ethoxylated ricinolein; wherein the active ingredient has a water-solubility of at least 1 g/l at 25° C.; and wherein the ethoxylated ricinolein contains 35 to 50 molecules of ethylene oxide per molecule of ricinolein in polymerized form. It also relates to a method of stabilizing an aqueous agrochemical composition comprising the suspended particles of the active ingredient; to uses and methods of application of the agrochemical composition; and to a method for preparing the agrochemical composition; and to plant propagation material comprising the agrochemical composition.