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Powdery Mildew in Acorn Squash

How to identify and treat powdery mildew in Acorn Squash.

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Acorn Squash care requirements

water
Water deeply 1–2 inches per week; maintain consistent moisture during fruit development; reduce watering as fruits mature and begin hardening off
soil
Well-draining, fertile soil with pH 6.0–6.8; incorporate 2–3 inches of compost before planting; avoid compacted soil
light
Full sun; requires minimum 6–8 hours of direct sunlight daily for vigorous growth and fruit quality
symptoms

Symptoms to look for in Acorn Squash

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

Common causes in Acorn Squash

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

healing

How to treat powdery mildew in Acorn Squash

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

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Preventing powdery mildew in Acorn Squash

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