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Downy Mildew in Romanesco

How to identify and treat downy mildew in Romanesco.

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Romanesco care requirements

water
Consistent, even moisture; water deeply 1–1.5 inches per week. Avoid drought stress and waterlogging.
soil
Rich, fertile, well-draining soil with pH 6.0–7.5. Incorporate compost or aged manure; high nitrogen content needed.
light
Full sun; requires 6–8 hours of direct sunlight daily for proper head development and color.
symptoms

Symptoms to look for in Romanesco

  • fiber_manual_recordYellow patches on upper leaf surface
  • fiber_manual_recordGrey-purple fuzzy growth on undersides
  • fiber_manual_recordWilting
help

Common causes in Romanesco

Caused by Peronospora and Pseudoperonospora species. Spreads in cool, humid conditions.

healing

How to treat downy mildew in Romanesco

Remove affected material. Apply copper fungicide or phosphonate.

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Preventing downy mildew in Romanesco

Avoid overcrowding. Water in morning. Choose resistant varieties.