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Downy Mildew in Watercress
How to identify and treat downy mildew in Watercress.
potted_plant
Watercress care requirements
water
Requires consistently wet or waterlogged soil—essentially mimicking shallow stream conditions. Keep roots submerged or in perpetually moist soil. Standing water or hydroponic systems work well.
soil
Prefers sandy or silty, well-draining soil with high moisture retention. Can also grow in gravel or hydroponic media. Rich organic content is beneficial but not essential; watercress tolerates poor soils.
light
Partial shade to full sun; prefers 4–6 hours of direct light. Too much intense sun can stress the plant; dappled light is ideal.
symptoms
Symptoms to look for in Watercress
- fiber_manual_recordYellow patches on upper leaf surface
- fiber_manual_recordGrey-purple fuzzy growth on undersides
- fiber_manual_recordWilting
help
Common causes in Watercress
Caused by Peronospora and Pseudoperonospora species. Spreads in cool, humid conditions.
healing
How to treat downy mildew in Watercress
Remove affected material. Apply copper fungicide or phosphonate.
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Preventing downy mildew in Watercress
Avoid overcrowding. Water in morning. Choose resistant varieties.