PLANT MALE STERILANT

A plant male sterilant, which comprises as an active ingredient a compound having the formula (I) : wherein M is an alkali metal cation, an alkaline earth metal cation or in which R , R and R are the same or different and each is hydrogen atom, a C1-C6 alkyl group, a C3-C4 alkenyl group, a C3-C4 alkynyl group, a C3-C8 cycloalkyl group, benzyl group or phenyl group; R is a C1-C9 alkyl group, a C3-C6 alkenyl group, a C3-C4 alkynyl group, a C1-C3 alkoxy (C1-C4)-alkyl group, a C1-C3 mono-or polyhaloalkyl group, a C3-C8 cycloalkyl group, benzyl group or phenyl group; and R and R are the same or different and each is hydrogen atom, a C1-C6 alkyl group, a C3-C4 alkenyl group, a C3-C4 alkynyl group, a C3-C8 cycloalkyl group, a benzyl group in which at most two of hydrogen atoms at the alpha -position thereof may be substituted by methyl group, a C2-C3 hydroxyalkyl group or a phenyl group in which at most three of hydrogen atoms thereof may be substituded by the same or different C1-C2 alkyl group or halogen atom; Y is fluorine atom, chlorine atom, a trihalomethyl group or a C1-C6 alkoxy group; A is a C1-C3 polyhaloalkyl group; A' is hydrogen atom or a halogen atom; and W and Z are C-F and N-H respectively with non-bonding or are taken together to form C-N, provided that X is OR in case that W and Z are C-F and N-H respectively. The plant male sterilant of the present invention can easily and efficiently induce male sterility in a plant without losing a pollination ability of the plant.