PROCESS FOR PRODUCING FUNGICIDAL COMPOUNDS AND APPLICATION THEREOF IN THE CONTROL OF SEEDS AGAINST PLANT DISEASES TRANSMITTED BY SEEDS

摘要

Fungi which infect seeds and grains are controlled by treatment with 4,4'-azodipyridine (I) or its acid salts of formula (Ia) (where A is acid of Ka1 x 10-6; and p is no. of H atoms in A having Ka1 x 10-6). Salts (Ia) are new; specifically 4,4'-azodipyridinium 1,2-benzenedicarboxylate. (I) and (Ia) are specifically used for control of Helminthosporium species of cereal grains; i.e. as replacement for Hg-contg. cpds. The rate of application is 10-500, esp. 20-250g per kg.