Septoria nodorum blotch

Septoria nodorum

Septoria nodorum blotch lesions are often lens-shaped with a yellow-green border surrounding the dead tissue area. Pycnidia may or may not appear within the centre of the lesion, but are more common on nodes and stems, leaf sheaths and glumes. Pycnidium distribution is random and does not follow the stomatal pattern distribution in line as does Septoria tritici blotch. Whenever nodes are infected, it may cause distortion and bending of the straw with a possibility of lodging and breakage of the straw at the node with subsequent losses in yield.

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