Linseed (Linum usitatissimum) commonly known as flax is one of the oldest cultivated oilseed crop (in the world. Altrnaria blight of is an important disease of Linseed (Linum usitatissimum L) that hampers its productivity and oil content. During severe infections, spots coalesced and covered the large area of the leaves. Microscopic examination of pathogens in diseased tissue reveled that Alternaria linicola Groves & Skolko and Alternaia lini Dey were two fungi associated with the spots on leaves and capsules. Studies of relative dominance of pathogens associated with the diseased tissue...