| abstract |
ABSTRACT The present invention refers to the technical field of pesticides, and refers, in particular, to a pyrazole compound or a salt thereof, a method of preparation thereof, a herbicidal composition and its use. A pyrazole compound of formula (I) or one of its salts: wherein, R 1 represents hydrogen or C 1 -C 4 alkyl; R2 represents C1-C3 alkyl; R3 represents a linear chain or C1-C6 cyclic group containing one or more heteroatoms selected from O, S and N; R4 represents a halogen or C1-C3 alkyl; R5 represents a pyrazole ring or a pyrazole ring substituted with one or more groups selected from alkyl, alkoxy, halogen, halogenated alkyl, amino and nitro. The pyrazole compound is an excellent herbicide with broad spectrum biological activity and excellent crop safety. |