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Septoria & The Importance of T1 Sprays

Symptoms and diagnosis of septoria

Septoria symptoms can be spotted very early in the growing season most years. Young autumn-sown wheat, water-soaked patches, which quickly turn brown and necrotic may be present by early December and throughout winter on the lower leaves. These contain visible black pycindia which are the most characteristic feature of Zymoseptoria tritici. These are particularly common on dead over-wintering leaves of winter wheat. On the mature plant, lesions are brown and sometimes restricted by veins giving a retangular appearance. The black pycnidia become more visible in the lesions as the symptoms develop. Lesions may coalesce leading to large areas of necrotic brown tissue.

What situations favour septoria?

  • Long distance spread of airborne ascospores throughout the winter and early spring.
  • In the spring, the lower leaves of the most susceptible varieties are infected and have actively sporulating lesions.
  • Most disease spread to upper leaves occurs by rain-splash from the lower-leaves during heavy rainfall.
  • This is the most important foliar disease on winter wheat in the UK.
  • Losses of 50% have been reported in severely affected crops.

Find out more about our Cereal Fungicide T1 products

Adexar®

Adexar®

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Librax®

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