Pyridine and pyrazine derivatives, process for the preparation of these compounds, fungicides containing these compounds as active substances, use of these compounds or fungicides to combat fungi in agriculture and in horticulture, and ketones and fungicides containing them

摘要

the invention relates to new pyridine derivatives of the formula and pyrazinwherein r 1 to 3 halogenatomen substituiertes phenyl, with the two ortho positions are occupied at the same time, r 'haloge