Common coffee pests and diseases – how to manage them
Why manage pests and diseases well in coffee?
Coffee is a perennial crop; without timely prevention, trees will:
- Lose vigour, drop leaves, produce small fruit
- Flower unevenly
- Give lower yields and bean quality
- Be reinfested easily, with fast spread in the rainy season
Common insect pests on coffee
1. Mealybugs (Planococcus spp.)
- Concentrate on young tips, leaf stalks and feeder roots
- Suck sap and excrete honeydew that favours sooty mould
- Cause stunted tips, weak flowering and fruit drop
Solution:
Use Pilaravia 155SC – a product with two-way systemic action, reaching pests on stems and roots
Combine with Viet-up 90 for better penetration and adhesion, especially in the rainy season
2. Black citrus aphid (Toxoptera aurantii)
- Damage young leaves, causing curling and distortion
- Multiply quickly in the early dry season
Solution:
Use systemic products; spray early when density is low
Use a sticker to reduce product loss when spraying
3. Stem and branch borers (Xyleborus spp.)
- Bore into stems, causing dieback and shortening tree life
- Very hard to treat if not detected early
Solution:
Cut off bored branches and destroy them away from the garden
Spray preventively with strongly systemic products
Common diseases
1. Pink disease (Erythricium salmonicolor)
- Causes branch rot, wilting and gradual leaf drop
- Common in the wet rainy season
Measures:
Prune for good airflow
Spray contact or systemic fungicides (early stage)
2. Cercospora leaf spot
- Round greyish-brown spots appear on leaves
- Causes mass leaf drop → affects flowering and fruit set
Measures:
Spray preventively early; rotate active ingredients
Add micronutrient fertiliser to strengthen resistance
Suggested pest and disease management calendar
| Stage | Main pests and diseases | Suggested treatment |
|---|---|---|
| Start of rainy season | Aphids, leaf spot | Preventive spray with systemic product + adjuvant |
| Mid rainy season | Mealybugs, pink disease | Use Pilaravia 155SC + Viet-up 90 |
| End of rainy season | Stem borers, leaf spot | Garden sanitation, preventive spray + foliar fertiliser |
Tips for better pest and disease control
✅ Rotate active ingredients to avoid resistance
✅ Spray at the right time – low densities are easier to control
✅ Do not spray in rain or strong sun
✅ Add the Viet-up 90 sticker to reduce wash-off and save costs
Need advice on coffee pests and diseases and suitable solutions?
Call +84 86 210 5050 or visit www.vietcropchem.com
Read more:
Common coffee pests and diseases and how to manage them
Planting and caring for high-yield coffee
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[NEWS 16/8/2025]
