Common crops affected
What is it?
Damping-off is caused by several soil pathogens, most commonly Pythium and Phytophthora, along with Rhizoctonia and Fusarium. They attack germinating seeds and young seedlings, rotting the stem at the soil line. Cool, wet, overcrowded, poorly drained conditions strongly favor the disease.
How to identify it
- Seedlings that suddenly fall over with a pinched, water-soaked, dark stem at the soil line
- Seeds that fail to emerge (pre-emergence rot)
- White or gray mould on the soil surface or seedling base
- Patches of collapse spreading through a tray or bed
Damage and how it spreads
Damping-off can wipe out an entire tray or seedbed quickly, and surviving seedlings are often stunted. Because the pathogens live in soil, water, and reused containers, the disease recurs wherever conditions are wet and crowded. Prevention is far more effective than rescue once seedlings start collapsing.
How to control it
- Use clean, well-draining media and sanitized trays and tools.
- Avoid overwatering; provide good airflow and don't sow too densely.
- Bottom-water and let the surface dry between waterings.
- Apply a protective natural fungicide drench to protect germinating seedlings.
Recommended Vegalab solution: Spore Control
Vegalab Spore Control (Thymol) lists damping-off (Pythium, Phytophthora) among its targets; it forms a protective film and inhibits spore germination and mycelium proliferation. Apply per the label to protect seedlings during the vulnerable germination and early-growth window, alongside clean media and careful watering. Building healthy soil biology with Charge Bioboost and strong early roots with Root Boost further reduces risk.
| Role | Product | Use |
|---|---|---|
| Primary control | Spore Control | Broad-spectrum protective fungicide |
| Companion / broader pressure | Charge Bioboost | Soil biology / suppressive soil |
| Plant support | Root Boost | Root development / establishment |
Preventing it next season
Start with clean media and sanitized trays, water carefully, give airflow, avoid overcrowding, and protect seedlings preventively. Healthy soil biology suppresses these pathogens — support it with Charge Bioboost.
Claims and product availability vary by jurisdiction. Always read and follow the product label.