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Story: Arable farming

Powdery mildew

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Powdery mildew

Powdery mildew on peas can be widespread and severe in warm, dry seasons. Initial leaf infection appears as small, white lesions. Severely infected leaves become grey-green as spores are produced. Resistant cultivars should be grown, and systemic fungicides are also available.

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How to cite this page

Sue Zydenbos, Arable farming – Diseases and pests, Te Ara – the Encyclopedia of New Zealand, https://teara.govt.nz/en/photograph/17595/powdery-mildew (accessed 23 June 2026).

Story by Sue Zydenbos, published 1 March 2009.