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Downy Mildew in Acorn Squash
How to identify and treat downy mildew in Acorn Squash.
potted_plant
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_recordYellow patches on upper leaf surface
- fiber_manual_recordGrey-purple fuzzy growth on undersides
- fiber_manual_recordWilting
help
Common causes in Acorn Squash
Caused by Peronospora and Pseudoperonospora species. Spreads in cool, humid conditions.
healing
How to treat downy mildew in Acorn Squash
Remove affected material. Apply copper fungicide or phosphonate.
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Preventing downy mildew in Acorn Squash
Avoid overcrowding. Water in morning. Choose resistant varieties.