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Ring spot

Ring spot

Description

  • Ring spot is a foliar fungal disease of cereals and most grass species

  • It is normally distributed fairly evenly through the crop

Symptoms

  • Scattered, yellow leaves across paddock.

  • Leaves have small brown spots 1-4 mm with dark brown rims and pale brown centres.

  • Spiky fungal structures are produced from previously infected grass seeds

Damage

  • Yield penalty is very minor, often no yield loss occurs

Control

  • Fungicide treatment is rarely required.

  • Control grass weeds, particularly brome and barley grass, in the year before sowing cereals

  • Avoid successive cereal crops

 

Links and Resources

DAFWA - Ring Spot

Introduction, what to look for, other similar diseases, where did it come from, and treatments.