Spraying coffee in the rainy season – Which sticker works well?
Rainy season – a major challenge when spraying coffee
Spraying in the rainy season often leads to:
- Wash-off – the product does not stay on the leaves
- Poor pest and disease control – repeated re-spraying
- Higher costs, more labour and time
That is why sticker – spray adjuvants have become a valuable aid for growers in the rainy season.
What is a sticker? Why does coffee need one?
A sticker is mixed with crop protection products to:
- Help the product adhere firmly to the leaf surface (including smooth, waxy leaves such as coffee)
- Improve penetration into leaf tissue
- Reduce losses from rain, dew and strong sun
Coffee leaves are glossy, thick and waxy, so sprays run off easily – which makes a sticker very important.
Viet-up 90 – a sticker option for the rainy season
✅ Features of Viet-up 90:
- Good adhesion, even on waxy and older leaves
- Fast penetration, supports systemic products
- Reduces wash-off and losses from early rain
- Gentle on crops when used as directed, mixes easily with many crop protection products
How to use Viet-up 90 when spraying coffee
| Crop protection product type | Mixing guidance |
|---|---|
| Insecticides, mealybug/aphid products | Add Viet-up 90 at 5–10ml/20L tank |
| Fungicides | Viet-up 90 improves adhesion and penetration into leaf tissue |
| Foliar fertilisers | Use together to improve nutrient uptake |
Note: Spray early in the morning or in the cool afternoon
Need advice on using Viet-up 90 on coffee?
Call the Vietcropchem agronomy team for support
Phone: +84 86 210 5050
Read more:
Products for mealybugs and aphids on coffee – a two-way systemic approach
Common coffee pests and diseases and how to manage them
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[NEWS 28/8/2025]
