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Barley powdery mildew — OCR GCSE Combined Science A Definition

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Combined Science
Key terms
Barley powdery mildew

GCSE Combined Science · key term

Barley powdery mildew

Definition

A fungal disease of barley caused by Erysiphe graminis, now called Blumeria graminis, which produces white or grey powdery growth on leaves.

Used by OCR

How each exam board covers it

OCR GCSE Combined Science A · J250

Specification B6.3f · Biology Paper 2

Three examples show how different pathogens produce different symptoms: tobacco mosaic virus, barley powdery mildew and crown gall disease.
Revise: Viral, Fungal and Bacterial Plant Diseases

OCR Combined Science A past papers

Related key terms

Crown gall disease
Fungicide
Gall
Pathogen
Spore

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Tobacco mosaic virus (TMV)