halo spot

'halo spot' can also refer to...


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  • Plant Sciences and Forestry
  • Ecology and Conservation


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A disease of barley and other cereals, caused by the fungus Septoria oxyspora (Selenophoma donacis). Lesions on upper leaves have pale centres with dark margins. The disease is important in only a few regions of Britain, including the wetter western regions of England, Wales, and Ireland.

Subjects: Plant Sciences and Forestry — Ecology and Conservation.

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