The present invention relates to the use of herbicidal substituted phenyl-pyridazinediones and substituted phenyl-pyridazinone derivatives of formula (I), in combination with herbicidal pyrrolidinone derivatives of the formula (II) to control undesirable plant growth, in controlling weeds, including broad-leaved and/or narrow-leaved, monocotyledonous and/or dicotyledonous weeds, in crops of useful plants.

The present invention relates to the use of herbicidal substituted phenyl-pyridazinediones and substituted phenyl-pyridazinone derivatives of formula (I), in combination with herbicidal pyrrolidinone derivatives of the formula (II) to control undesirable plant growth, in controlling weeds, including broad-leaved and/or narrow-leaved, monocotyledonous and/or dicotyledonous weeds, in crops of useful plants.

Crop production in agriculture, horticulture, and the like has still been significantly damaged by pests and the like, and pests that are resistant to existing drugs have appeared. Due to such concerns, it is desired to develop novel insecticidal agents and acaricides.

The present invention has found that a compound represented by general formula (1):

##STR00001##

wherein X and Y represent an oxygen atom or a sulfur atom, R.sup.1 represents a hydrogen atom or the like, R.sup.2 represents a substituted phenyl group or the like, R.sup.3 represents a hydrogen atom or the like, and R.sup.4 represents a phenyl group or the like, or a salt thereof has a high insecticidal effect on pests in agriculture and horticulture, and the like. The present invention provides an agricultural and horticultural insecticidal agent containing the compound or a salt thereof as an active ingredient, and a method of use thereof.

Crop production in agriculture, horticulture, and the like has still been significantly damaged by pests and the like, and pests that are resistant to existing drugs have appeared. Due to such concerns, it is desired to develop novel insecticidal agents and acaricides.

The present invention has found that a compound represented by general formula (1):

##STR00001##

wherein X and Y represent an oxygen atom or a sulfur atom, R.sup.1 represents a hydrogen atom or the like, R.sup.2 represents a substituted phenyl group or the like, R.sup.3 represents a hydrogen atom or the like, and R.sup.4 represents a phenyl group or the like, or a salt thereof has a high insecticidal effect on pests in agriculture and horticulture, and the like. The present invention provides an agricultural and horticultural insecticidal agent containing the compound or a salt thereof as an active ingredient, and a method of use thereof.

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##

The present invention relates to the use of herbicidal substituted phenyl-pyridazine-diones and substituted phenyl-pyridazinone derivatives of formula (I), in combination with herbicidal pyrazolo-lactam-carboxamides of formula (II) to control undesirable plant growth, in controlling weeds, including broad-leaved and/or narrow-leaved, monocotyledonous and/or dicotyledonous weeds, in crops of useful plants.

##STR00001##

The present invention relates to the use of herbicidal substituted phenyl-pyridazine-diones and substituted phenyl-pyridazinone derivatives of formula (I), in combination with herbicidal pyrazolo-lactam-carboxamides of formula (II) to control undesirable plant growth, in controlling weeds, including broad-leaved and/or narrow-leaved, monocotyledonous and/or dicotyledonous weeds, in crops of useful plants.

##STR00001##

A compound represented by Formula (1): ##STR00001##
The compound can be used as insecticides.

A compound represented by Formula (1): ##STR00001##
The compound can be used as insecticides.