| 摘要 |
<p>The invention is concerned with novel pyridine and pyrazine derivatives of the formula IMAGE , wherein R1, R2, R3 and R4 have the significance given in the description, and acid addition salts of these compounds, a process for their manufacture, fungicidal compositions which contain these compounds as the active substance, as well as the use of said compounds or compositions for the control of fungi in agriculture and in horticulture.</p> |
