Compounds of the formula I ##STR1## in which a) X is CH and Y is N; or b) X is N and Y is CH; and in which Z is a C.sub.1 group to which there are bonded 1-3 halogen atoms or 1-3 substituted or unsubstituted hetero atoms O, S and/or N are suitable for controlling and preventing microbial attack on plants.
公式I的化合物 ##STR1## 在该公式中 a) X为CH且Y为N; 或者 b) X为N且Y为CH; Z是一个C.sub.1基团,其中有1-3个卤素原子或1-3个取代或未取代的杂原子O、S和/或N与之结合,适用于控制和预防植物上的微生物攻击。