Process for the preparation of antibiotic AB 021, antibiotics (ab - 021b microorganism Streptomyces S.P., biologically pure culture, compound and compositions fungicides or bactericides and /

摘要

The AB-021 antibiotics and the main components thereof, AB-021a antibiotic and AB-021b antibiotic, obtained by means of the controlled aerobic cultivation of Streptomyces s p. NCIB 40068 in an aqueous nutrient cultivation medium, are disclosed. Said antibiotics show a biological activity against pathogenic fungi of agrarian cultivations, pathogenic human fungi and bacteria.