Novel compounds of the formula ##STR1## in which: R.sub.1 and R.sub.2 independently of one another are hydrogen, halogen, C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.2 halogenoalkyl, C.sub.1 -C.sub.3 alkoxy or C.sub.1 -C.sub.3 halogenoalkoxy; R.sub.3 is C.sub.3 -C.sub.6 cycloalkyl or C.sub.3 -C.sub.6 cycloalkyl which is substituted by up to three identical or different methyl or halogen groups; R.sub.4 is halogen, thiocyano, --OR.sub.5, --SR.sub.5 or --NR.sub.5 R.sub.6, in which R.sub.5 and R.sub.6 are halogen groups; R.sub.4 is halogen, thiocyano, --OR.sub.5, --SR.sub.5 or --NR.sub.5 R.sub.6, in which R.sub.5 and R.sub.6 are as defined herein, are novel active compounds for preventing attack of plants by microorganisms. The compounds can be employed as microbicides as such or in the form of suitable agents.
公式为##STR1##的新化合物,其中:R.sub.1和R.sub.2彼此独立地是氢、卤素、C.sub.1-C.sub.3烷基、C.sub.1-C.sub.2卤代烷基、C.sub.1-C.sub.3烷氧基或C.sub.1-C.sub.3卤代烷氧基;R.sub.3是C.sub.3-C.sub.6环烷基或C.sub.3-C.sub.6环烷基,其被多达三个相同或不同的甲基或卤素基取代;R.sub.4是卤素、
硫氰基、--OR.sub.5、--SR.sub.5或--NR.sub.5R.sub.6,其中R.sub.5和R.sub.6是卤素基;R.sub.4是卤素、
硫氰基、--OR.sub.5、--SR.sub.5或--NR.sub.5R.sub.6,其中R.sub.5和R.sub.6如上所定义,是用于预防植物受微
生物攻击的新型活性化合物。这些化合物可以作为微
生物杀剂本身或以适当的剂型使用。