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Downy Mildew in Pak Choi

How to identify and treat downy mildew in Pak Choi.

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Pak Choi care requirements

water
Consistent moisture; water deeply 1–2 times per week; keep soil evenly moist but not waterlogged
soil
Rich, well-draining soil with high organic matter; pH 6.0–7.5
light
Full sun to partial shade; 6 hours of direct sun optimal; can tolerate shade in warm seasons
symptoms

Symptoms to look for in Pak Choi

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

Common causes in Pak Choi

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

healing

How to treat downy mildew in Pak Choi

Remove affected material. Apply copper fungicide or phosphonate.

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Preventing downy mildew in Pak Choi

Avoid overcrowding. Water in morning. Choose resistant varieties.