Maculansins, Cryptic Phytotoxins from Blackleg Fungi

The phytotoxins and other metabolites produced by isolates L2/M2 of the fungal species Leptosphaeria maculansunder different culture conditions, together with those of two new, but related isolates are disclosed. The common metabolic characteristics suggest a phylogenetic similarity between these isolates with potential to become widespread in mustard growing areas.