Spraying many times but the mealybugs survive? You may not be combining products correctly!
Mealybugs are hard to control fully with a single product or incorrect spraying. Because they hide deep – have a thick wax layer – live within the plant and below the roots, combining a targeted product with a suitable adjuvant is key to improving mealybug control.
Why combine products and adjuvants for mealybug control?
1. Mealybugs have a thick wax layer – blocking product penetration
- Many active ingredients slide off or evaporate on contact with the wax → mealybugs are not affected.
- Solution: Combine a sticker and penetrant to open the wax layer and carry the active ingredient into the mealybug's body tissue.
2. Mealybugs hide deep in sheaths – roots – stems
- A single product without systemic action often cannot reach where mealybugs hide.
- Solution: Use a two-way systemic product + a spreading aid, helping the active ingredient move through the plant's vascular tissue.
3. Efficacy improves with the right combination
- According to Vietcropchem trials: Pilaravia 155SC + Viet-up 90 gave higher mealybug control than Pilaravia 155SC alone.
✅ A recommended combination: Pilaravia 155SC + Viet-up 90
| Product | Specific role |
|---|---|
| Pilaravia 155SC | Mealybug product, two-way systemic, penetrates to act at the source |
| Viet-up 90 | Sticker – penetrant adjuvant that helps the product spread evenly, adhere to the wax layer and resist wash-off in rain |
Viet-up 90 also helps save product, reduces evaporation, and suits Vietnam's wet conditions.
How to mix the combination correctly
- Fill the 25L tank with water
- Add 20–25ml Pilaravia 155SC
- Add 20ml Viet-up 90 (last)
- Stir well and spray immediately after mixing
- Spray evenly to wet the canopy – stems – sheaths – base – roots
✅ Larger volumes can be mixed for motorised sprayers at the equivalent ratio.
When to use the combination
- As soon as mealybugs are found on leaves – stems – base
- At the start of the rainy season (to prevent recurrence)
- After each pruning and canopy shaping
- Every 14–21 days if the orchard regularly has mealybugs
Possible results
- After 1 combined spray, a reduction of 80–90%
- After 2 sprays, numbers reduced by >90% with no reinfestation after 14 - 21 days
- Plants recover quickly
Conclusion
The right combination = good results + cost savings.
Pilaravia 155SC and Viet-up 90 are a recommended combination for mealybug prevention and control programmes, with practical results reported on many key crops.
Read next: A real story: https://vietcropchem.com/tin_tuc/Cau-chuyen-thuc-te:-Nong-dan-xu-ly-sach-ray-chich-hut-nho-Pilaravia-155SC A farmer treats sap-sucking leafhoppers with Pilaravia 155SC
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