Helminthosporium gramineum

A further series of hydroxyanthraquinones were isolated by Raistrick at the same time from Helminthosporium species. These organisms are found on cereals and grasses. When Helminthosporium gramineum, the causative organisms of a leaf stripe disease of barley, was grown on a Czapek-Dox medium it imparted a deep-red colour to the medium. Under some conditions the underside of the mycelial mat was partially covered with dark-red needle-shaped crystals. The main constituent was a trihydroxyanthraquinone, helminthosporin (7.8). Its structure was... 

Helminthosporin and hydroxyhelminthosporin, metabolic products of the plant pathogen, Helminthosporium gramineum, J.H.V. Charles, H. Raistrick,... 

It is not phytotoxic. It does not affect the alcoholic fermentation of must (Lacroix et al, 1974). It is efficient against storage rot of apples (Bompeix et al., 1979). Combined with carbendazime it is very effective for the seed dressing of cereals. It gives excellent protection against Helminthosporium gramineum, H. avenae, H. sativum, Tilletia caries, Fusarium roseum and Septoria nodorum (Chalandon et al., 1979). 

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