| abstract |
The invention belongs to the field of pesticides, and in particular relates to a pyrazole compound or a salt thereof, a preparation method, a herbicide composition and use. The pyrazole compound or its salt has the structure of formula (I): In formula (I), R represents Among them, R', R", R"' represent a hydrogen atom, C1-C4 alkyl, C1-C4 haloalkyl, C1-C4 alkoxy or halogen, R', R", R"' can be the same or different ; R 1 represents a C1-C3 alkyl group; R 2 represents a hydrogen atom or a C1-C4 alkyl group; R 3 represents a hydrogen atom or a C1-C6 alkyl group, a phenyl group that may be substituted, a pyridyl group that may be substituted, and a phenyl group that may be substituted Substituted alkenyl, optionally substituted alkynyl, C1-C6 alkylcarbonyl, C1-C6 alkoxycarbonyl, C1-C6 alkylcarbonylmethyl and the like. The pyrazole structure not only has excellent effect on barnyardgrass, but also is safe for rice when applied after emergence. What is even more surprising is that the barnyardgrass that is resistant to major barnyard-killing agents such as penoxsulam, quinclorac, cyhalofop-ethyl, and propanil is equally effective. |