The present invention belongs to the field of pesticides, particularly relates to a pyrazolone compound or a salt thereof, a preparation method therefor, a herbicidal composition and use thereof. The pyrazolone compound is as described in formula I: ##STR00001## In the formula, R.sub.1R.sub.2N represents substituted or unsubstituted 3-8 membered nitrogen-containing heterocyclic group containing 1-3 heteroatoms; or R.sub.1 and R.sub.2 each represent hydrogen or C.sub.1-8 alkyl; R.sub.3 represents hydrogen, C.sub.1-4 alkyl, alkenyl, alkynyl, unsubstituted C.sub.3-6 cycloalkyl or C.sub.3-6 cycloalkyl substituted by C.sub.1-4 alkyl; R.sub.4 represents methyl, ethyl, n-propyl, isopropyl or cyclopropyl; X represents hydrogen, —S(O).sub.nR.sup.6, —R.sup.7 or substituted or unsubstituted 3-8 membered heterocyclic group containing 1-4 heteroatoms, wherein, n represents 1, 2 or 3, R.sup.6 represents substituted or unsubstituted alkyl or aryl, and R.sup.7 represents substituted or unsubstituted alkyl, aryl, alkyl acyl or aroyl. The active substance of the invention exhibits good herbicidal effect, and is convenient to use, low in cost and has great commercial value.

The present invention belongs to the field of pesticides, particularly relates to a pyrazolone compound or a salt thereof, a preparation method therefor, a herbicidal composition and use thereof. The pyrazolone compound is as described in formula I: ##STR00001## In the formula, R.sub.1R.sub.2N represents substituted or unsubstituted 3-8 membered nitrogen-containing heterocyclic group containing 1-3 heteroatoms; or R.sub.1 and R.sub.2 each represent hydrogen or C.sub.1-8 alkyl; R.sub.3 represents hydrogen, C.sub.1-4 alkyl, alkenyl, alkynyl, unsubstituted C.sub.3-6 cycloalkyl or C.sub.3-6 cycloalkyl substituted by C.sub.1-4 alkyl; R.sub.4 represents methyl, ethyl, n-propyl, isopropyl or cyclopropyl; X represents hydrogen, —S(O).sub.nR.sup.6, —R.sup.7 or substituted or unsubstituted 3-8 membered heterocyclic group containing 1-4 heteroatoms, wherein, n represents 1, 2 or 3, R.sup.6 represents substituted or unsubstituted alkyl or aryl, and R.sup.7 represents substituted or unsubstituted alkyl, aryl, alkyl acyl or aroyl. The active substance of the invention exhibits good herbicidal effect, and is convenient to use, low in cost and has great commercial value.

The current invention concerns a synergistically effective herbicide composition comprising as component (A) an herbicidally active amount of pyridate and as component (B) at least one 4-HPPD inhibitor selected from the group comprising triketones, pyrazolones, isoxazoles and other 4-HPPD inhibitors, wherein a weight ratio of components (A) and (B) is in a range up to 1000:1.

The invention further concerns a kit comprising pyridate and at least one 4-HPPD inhibitor and a use of a herbicide composition according to the invention in an amount effective for controlling one or more types of unwanted vegetation by applying the herbicide composition to the unwanted vegetation and/or a habitat thereof.

The current invention concerns a synergistically effective herbicide composition comprising as component (A) an herbicidally active amount of pyridate and as component (B) at least one 4-HPPD inhibitor selected from the group comprising triketones, pyrazolones, isoxazoles and other 4-HPPD inhibitors, wherein a weight ratio of components (A) and (B) is in a range up to 1000:1.

The invention further concerns a kit comprising pyridate and at least one 4-HPPD inhibitor and a use of a herbicide composition according to the invention in an amount effective for controlling one or more types of unwanted vegetation by applying the herbicide composition to the unwanted vegetation and/or a habitat thereof.

Disclosed is a wettable agrochemical composition comprising an agrochemical active component (A), which is a compound represented by the following formula (I) or an agriculturally and horticulturally acceptable acid addition salt thereof, one or more additives, and one or more surfactants, the wettable agrochemical composition being solid at 30° C. This wettable agrochemical composition has excellent physical properties of the formulation and storage stability.

##STR00001##

Disclosed is a wettable agrochemical composition comprising an agrochemical active component (A), which is a compound represented by the following formula (I) or an agriculturally and horticulturally acceptable acid addition salt thereof, one or more additives, and one or more surfactants, the wettable agrochemical composition being solid at 30° C. This wettable agrochemical composition has excellent physical properties of the formulation and storage stability.

##STR00001##

The present invention is directed to an aqueous composition comprising spirotetramat, pyriproxyfen, a solvent system comprising heavy aromatic naphtha, cottonseed oil and optionally, acetyl tributyl citrate, one or more poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymers and an acrylic type co-polymer having a backbone containing a carboxylated ethylenically unsaturated monomer and a non-carboxylated ethylenically unsaturated monomer and water. The present invention is further directed to methods of controlling pests by applying the compositions of the invention to an area in need thereof.

The present invention is directed to an aqueous composition comprising spirotetramat, pyriproxyfen, a solvent system comprising heavy aromatic naphtha, cottonseed oil and optionally, acetyl tributyl citrate, one or more poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymers and an acrylic type co-polymer having a backbone containing a carboxylated ethylenically unsaturated monomer and a non-carboxylated ethylenically unsaturated monomer and water. The present invention is further directed to methods of controlling pests by applying the compositions of the invention to an area in need thereof.

The present invention is directed to an aqueous composition comprising spirotetramat, pyriproxyfen, a solvent system comprising heavy aromatic naphtha, cottonseed oil and optionally, acetyl tributyl citrate, one or more poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymers and an acrylic type co-polymer having a backbone containing a carboxylated ethylenically unsaturated monomer and a non-carboxylated ethylenically unsaturated monomer and water. The present invention is further directed to methods of controlling pests by applying the compositions of the invention to an area in need thereof.

A pyrazole derivative having the following formula stru-1: ##STR00001##
The pyrazole derivative is used for prevention and control of pests.