Th object of this invention provides a plant-pest controlling agent which has superior effectiveness, especially a compound useful for a rice blast disease controlling agent which is applied on the water surface, than those in the prior art.In particular, the invention provides a thiazolylcarboxamide deriviate represented by the general formula (I): [wherein, R1 represents a hydrogen atom, a halogen atom, an alkyl group or an haloalkyl group Y represents O, S, SO, SO2, -N(R3)-, or -N=C(R3)- (R3 represents a hydrogen atom, an alkyl group a formyl group, an alkoxyalkyl group and the like), when Y represents O, S, SO, SO2, -N(R3)-, R2 represents an aminoalkyl group, a monoalkylaminoalkyl group, a dialkylaminoalkyl group, a hydroxyalkyl group, an alkoxyalkyl group, an alkoxyalkoxyalkyl group and the like, and when Y represents -N=C(R3)-, R2 represents an alkyl group, an alkoxy group and the like R4, R5, R6, R7 and R8 are the same or different, and represent a hydrogen atom, an alkyl group and the like X1, X2 and X3 are the same or different, and represent a hydrogen atom, a halogen atom, an alkyl group, a haloalkyl group, a cycloalkyl group and the like] or a salt thereof, and a plant-pest controlling agent containing the deriviate.本發明是,提供比以往的技術有優異的性能的植物病害防治劑,特別是做為在水面施用的稻熱病防治劑有用的化合物為目的。依本發明,可提供一般式(I)表示的噻唑羧醯胺衍生物或其鹽類,以及含有該衍生物的植物病害防治劑。(式中,R1表示,氫原子,鹵原子,烷基或鹵烷基;Y表示,O,S,SO,SO2,-N(R3)-,或-N=C(R3)-(R3表示,氫原子,烷基;甲醯基,烷氧烷基等。),Y表示,O,S,SO,SO2,-N(R3)-時,R2表示,胺基烷基,單烷胺基烷基,二烷胺基烷基,羥基烷基,烷氧烷基,烷氧烷氧烷基等,Y表示,-N=C(R3)-時,R2表示,烷基,烷氧基等;R4,R5,R6,R7及R8是可以相同或不相同,表示氫原子,烷基等;X1,X2及X3是可以相同或不相同,表示氫原子,鹵原子,烷基,鹵烷基,環烷基等。)
