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Powdery Mildew in Swiss Chard

How to identify and treat powdery mildew in Swiss Chard.

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Swiss Chard care requirements

water
Keep soil consistently moist, providing 1–1.5 inches of water per week. Water deeply at the base to encourage strong root development. Reduce frequency slightly in cool seasons but never allow soil to dry completely.
soil
Rich, well-draining soil with pH 6.0–7.5. Incorporate 2–3 inches of compost or aged manure before planting. Swiss chard appreciates fertile soil but adapts to moderate fertility.
light
Full sun preferred; 6–8 hours of direct sunlight daily. Tolerates partial shade but produces fewer, slower-growing leaves. Some afternoon shade in hot climates reduces bolting.
symptoms

Symptoms to look for in Swiss Chard

  • fiber_manual_recordWhite powdery patches on leaves
  • fiber_manual_recordDistorted new growth
  • fiber_manual_recordPremature leaf drop
help

Common causes in Swiss Chard

Caused by various fungal species. Spreads in warm, dry conditions with high humidity nights.

healing

How to treat powdery mildew in Swiss Chard

Remove affected leaves. Apply neem oil, potassium bicarbonate, or sulphur-based fungicide. Improve air circulation.

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Preventing powdery mildew in Swiss Chard

Space plants for good airflow. Avoid overhead watering. Choose resistant varieties.

Powdery Mildew in Swiss Chard — Symptoms & Treatment | GreenScout