| abstract |
The present invention relates to novel pyridazine derivatives of formula (I) as active ingredients which have microbiocidal activity, in particular fungicidal activity: formula (I) wherein R 1 is C 1 -C 6 alkyl, C 1 -C 6 haloalkyl or C 3 -C 6 cycloalkyl; R 2 is hydrogen or an optionally substituted alkyl, aryl or heteroaryl; R 3 is hydrogen, C 1 -C 6 alkyl or C 1 -C 6 haloalkyl; R 4 is hydrogen, C 1 -C 6 alkyl or C 1 -C 6 haloalkyl; or R 3 and R 4 together can be part of a carbocyclic or heterocyclic 3- to 8-membered ring; R 5 is optionally substituted aryl or heteroaryl; and R 6 is hydroxy, halogen, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, C 1 -C 6 alkylthio or C 1 -C 6 haloalkylthio; or an agrochemically usable salt form thereof. |