Glume blotch

Phaeosphaeria nodorum

The disease mainly attects wheat, but occasionally barley and rye.


S. nodorum can be seed borne and infect seedlings, resulting in water-soaked, dark green areas on the coleoptile, later becoming necrotic. Twisted, distorted and stunted seedlings may also occur. On mature leaf tissue the first symptoms of infection are small necrotic lesions.  Later these develop into brown oval lesions surrounded by a chlorotic halo.  These lesions frequently coalesce to produce large areas of dead, dry and sometimes split tissue.

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