O-substituted 3-oxypridinium salts, their preparation and their use as fungicides for crop protection

摘要

O-substituted 3-oxypyridinium salts of the formula <IMAGE> I where R1 is unsubstituted alkyl, alkenyl or alkynyl, or is aralkyl, R3 is hydrogen, alkyl, alkenyl or alkoxy, R2 is substituted or unsubstituted alkyl, alkenyl or alkynyl, or is aralkyl, and X(-) is an anion, and fungicides for crop protection containing these compounds.