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Phytophthora Blight in Peony

How to identify and treat phytophthora blight in Peony.

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Peony care requirements

water
Regularly when establishing. Drought tolerant once established.
soil
Deep, fertile, well-draining soil.
light
Full sun to partial shade.
symptoms

Symptoms to look for in Peony

  • fiber_manual_recordSudden wilting of foliage and stems despite moist soil
  • fiber_manual_recordWater-soaked, dark lesions on stems near the soil line
  • fiber_manual_recordRapid collapse and death of affected plants, especially after heavy rain
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Common causes in Peony

Caused by Phytophthora species that thrive in waterlogged or poorly drained soil, spreading via water-borne spores that infect stems and roots, especially during warm, wet weather.

healing

How to treat phytophthora blight in Peony

Remove and destroy affected plants promptly, improve drainage in the planting area, and apply a suitable fungicide preventively on remaining plants in high-risk conditions.

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Preventing phytophthora blight in Peony

Avoid overwatering and waterlogged soil, use raised beds or improve drainage, and avoid working in wet soil around susceptible plants.