A cyanoacetamide derivative of the formula, ##STR1## wherein R represents a C.sub.2 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.2 -C.sub.6 alkynyl or C.sub.3 -C.sub.6 cycloalky group, and X represents a chlorine or bromide atom or a trifluoromethyl or lower fluoroalkoxy group and a plant disease protectant comprising the same are disclosed. The cyanoacetamide derivative provided according to the present invention has an extremely high controlling activity against various plant diseases, particularly against rice blast (Pyricularia oryzae).
该公式的
氰乙酰胺衍
生物,其中R代表C.sub.2 -C.sub.6烷基,C.sub.2 -C.sub.6烯基,C.sub.2 -C.sub.6炔基或C.sub.3 -C.sub.6环烷基,X代表
氯或
溴原子或三
氟甲基或较低的氟烷氧基团,以及包括该衍
生物的植物病害防护剂被披露。根据本发明提供的
氰乙酰胺衍
生物对各种植物病害,特别是对
水稻纹枯病(Pyricularia oryzae)具有极高的控制活性。