Novel compounds of the formula ##STR1## wherein R.sub.1 is chlorine, bromine or nitro, R.sub.2 is chlorine or bromine, R.sub.3 is hydrogen or fluorine, R.sub.4 is C.sub.1 -C.sub.9 alkyl which is unsubstituted or substituted by halogen or C.sub.1 -C.sub.3 alkoxy, or is C.sub.2 -C.sub.7 alkenyl, C.sub. 2 -C.sub.4 alkynyl or C.sub.3 -C.sub.6 cycloalkyl, each of which is unsubstituted or substituted by halogen or aryl, or is phenyl which is unsubstituted or substituted by halogen, nitro or C.sub.1 -C.sub. 4 alkyl, or is a 5- membered heterocyclic ring system which contains a hetero-atom, or is X-R.sub.5, wherein X is oxygen or sulfur and R.sub.5 is C.sub.1 -C.sub.6 alkyl or C.sub.3 -C. sub.6 alkenyl, each of which is unsubstituted or substituted by halogen or C. sub.1 -C.sub.3 alkoxy, or is phenyl which is unsubstituted or substituted by halogen, nitro, C.sub.1 - C.sub.3 alkyl or C.sub.1 -C.sub.3 alkoxy, or is benzyl which is unsubstituted or substituted by halogen or nitro. PP These compounds possess useful microbicidal properties and can be used for controlling phytopathogenic microorganisms, especially phytopathogenic fungi. They have, for practical purposes, a very advantageous curative, preventive and systemic action for protecting cultivated plants, without adversely affecting these by undesirable side- effects.
展开▼
