| 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 R1 is C1-C6alkyl, C1-C6haloalkyl or C3-C6cycloalkyl; R2 is hydrogen or an optionally substituted alkyl, aryl or heteroaryl; R3 is hydrogen, C1-C6alkyl or C1-C6haloalkyl; R4 is hydrogen, C1-C6alkyl or C1-C6haloalkyl; or R3 and R4 together can be part of a carbocyclic or heterocyclic 3- to 8-membered ring; R5 is optionally substituted aryl or heteroaryl; and R6 is hydroxy, halogen, C1-C6alkoxy, C1-C6haloalkoxy, C1-C6alkylthio or C1-C6haloalkylthio; or an agrochemically usable salt form thereof. |