Pepper leaf yellowing and node drop: How to identify and treat it
Warning: yellow leaves and node drop are a sign the vine is in trouble
Leaf yellowing and node drop on pepper vines are common:
- After harvest
- At the start of the rainy season – high humidity
- When the vines are attacked by nematodes or fungi
- With severe nutrient deficiency (especially potassium, magnesium, calcium)
If not treated correctly, the vine shrinks, its base rots and it gradually dies – causing significant losses.
Identifying the causes of leaf yellowing and node drop on pepper
| Symptom | Cause | How to recognise |
|---|---|---|
| Leaves yellow from the base, dry and brittle | Potassium deficiency | Leaves break easily, do not wilt softly |
| Patchy yellowing in the middle of the leaf | Magnesium deficiency | Yellow between veins, veins still green |
| Whole vine yellow + base rot | Fungi – nematodes | Soft base, bad smell, oozing sap |
| Nodes dropping along the vine | Vine exhausted after harvest | No clear signs of pests or disease |
Check each part carefully to identify the exact cause before treating.
How to treat leaf yellowing and node drop on pepper
✅ 1. Correct nutrition
- Apply potassium (K), magnesium (Mg), calcium (Ca) – as foliar spray or soil drench
- Use well-composted organic fertiliser, combined with microbial products to improve the soil
✅ 2. Prevent and treat nematodes and root fungi
- Use nematicides and fungicides based on Metalaxyl + Fosetyl-Al
- Spray or drench at the base, repeat after 7–10 days
Combine with Viet-up 90 for foliar sprays to improve penetration
✅ 3. Prune and clean the garden
- Remove yellowed vines with node drop
- Prune old leaves and weak branches → a more open canopy
- Clear weeds around the base → less disease spread
Integrated treatment programme
| Stage | Measure | Suggested products |
|---|---|---|
| As soon as detected | Use a specific fungicide | Metalaxyl-based |
| After 7 days | Spray foliar fertiliser with K – Mg – micronutrients | KNO₃ + magnesium sulfate |
| Regular maintenance | Drench with microbial products, organic fertiliser | Depending on garden conditions |
Need a quick diagnosis of yellowing pepper leaves?
Call the Vietcropchem technical team for free support: +84 86 210 5050
SEO keywords used in this article: #TieuVangLa #TieuRungDot #BenhTieu #Besviet002SP #VietUp90 #PhucHoiCayTieu #Vietcropchem
[NEWS 01/10/2025]