Pythium Root Rot
Pythium spp.
2 host plants
Last updated
This profile contains verified disease data from extension databases. Regional field notes and expert review are in progress.
Pythium root rot causes decay of roots and crown tissues, particularly in poorly drained soils. Remove infected plants. Improve drainage where possible. Avoid overwatering and ensure proper site selection. Select plants suited to site conditions. Rotate to different crops if disease persists. Proper drainage and good site selection are critical to prevent root disease problems. Monitor plants for early signs of decline or wilting.
Root rots thrive in waterlogged soil, so drainage is your most important intervention. Avoid overwatering and ensure the planting site drains well. Remove severely affected plants to prevent spread to neighbors through root contact or contaminated soil. When replanting, choose resistant species or improve soil structure before putting anything back in the ground.
Quick Reference
Management
Cultural Controls
- Improve drainage in propagation and planting areas; avoid waterlogged or overwatered conditions.
- Use well-drained potting media and containers with adequate drainage holes. Do not use compacted or poorly aerated soil.
- Avoid overwatering; water only when media begins to dry at the surface. Use drip irrigation at the soil line, not overhead.
- Sterilize propagation media, containers, and tools to eliminate pathogens. Do not reuse pots or media from infected crops without sterilization.
- Ensure excellent air circulation in propagation beds, greenhouses, and container nurseries to promote soil drying.
- Use disease-free cuttings and transplants. Inspect nursery stock carefully and discard any showing root rot symptoms.