| 摘要 |
<p>The present invention relates to novel pyridazine derivatives of formula (I) as active ingredients which have microbiocidal activity, in particular fungicidal activity: wherein R1 is hydrogen, C<sub>1</sub>-C<sub>6</sub>alkyl, C<sub>1</sub>-C<sub>6</sub>haloalkyl or C<sub>3</sub>-C<sub>6</sub>cycloalkyl; R2 is an optionally substituted hereroaryl; R3 is an optionally substituted heteroaryl; and R4 is hydrogen, halogen, C<sub>1</sub>-C<sub>6</sub>alkyl, C<sub>1</sub>-C<sub>6</sub>haloalkyl, C<sub>1</sub>-C<sub>6</sub>alkoxy, C<sub>1</sub>-C<sub>6</sub>haloalkoxy, hydroxy or cyano; or an agrochemically usable salt form thereof.</p> |
