Phytophthora Root and Runner Rot
Phytophthora spp.
13 host plants
Last updated
This profile contains verified disease data from extension databases. Regional field notes and expert review are in progress.
You'll see root and runner rot on strawberry and other hosts as wilting and decline despite adequate water. Improve drainage in affected areas. Rotate to new land if possible. Select resistant varieties offer the best solution. Remove infected plants to prevent spread. Avoid planting in poorly drained locations. 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
- Plant on well-drained soil and beds. Avoid excessive irrigation. # Source: PNW Handbooks
- In container production, use raised benches or gravel-covered beds sloped to drain excess water quickly. # Source: PNW Handbooks
- Never reuse pots from previous crops without sterilization. # Source: PNW Handbooks
- Quarantine new plants for at least 1 year before planting in landscape beds. # Source: PNW Handbooks
- Monitor for symptoms (slow growth, wilting, brown roots). Remove and discard infected plants and surrounding soil. # Source: PNW Handbooks
- Improve air circulation around plants with proper spacing to reduce humidity. # Source: PNW Handbooks