Slow Release – Long-Lasting Effect for 10 to 120 Days: Is It True?

In modern crop protection, CS (Capsule Suspension) formulations are being described as a “new revolution” thanks to their ability to release active ingredients slowly, extending effectiveness from 10 to 120 days after just one application. But is this really accurate, or just marketing hype?

Let’s break it down with scientific evidence and practical use cases below.

🧪 1. The Slow-Release Mechanism of CS Formulations

CS pesticides are developed using microencapsulation technology, in which the active ingredient is enclosed in tiny polymer capsules (nano or micrometer scale). When sprayed onto crops, these microcapsules gradually release the active ingredient, rather than dispersing all at once like traditional formulations such as EC (emulsifiable concentrate), SC (suspension concentrate), or WP (wettable powder).

Effects of this mechanism:

• Reduces evaporation and wash-off caused by sun or rain
• Keeps the active ingredient on plant surfaces longer
• Maintains an effective concentration long enough to kill pests and pathogens even after reinfection

📌 According to manufacturers’ technical documents and field trials:
"Some CS products can maintain effectiveness from 10 to 120 days, depending on the active ingredient and usage conditions."

📈 2. Practical Use: Does It Really Last 120 Days?

Not all CS formulations last 120 days. The duration depends on:

📌 With CS insecticides like Lambda-cyhalothrin CS, recorded efficacy can reach 8–12 weeks after application.
📌 In public health (e.g., mosquito control), some CS products remain effective for up to 3 months after a single spray.

🌿 3. Benefits of Long-Lasting Effect for Farmers

✅ Labor savings

• Instead of spraying 3–4 times, farmers may only need 1–2 sprays per crop cycle.

✅ Reduced leaf burn & residues

• Gradual release prevents chemical shock to plants and minimizes residue levels.

✅ Cost optimization – less waste

• Even though CS products are pricier per bottle, fewer applications and longer efficacy reduce overall seasonal costs.

✅ Sustainable farming compatibility

• Less wash-off into the environment
• Meets safe agricultural standards (VietGAP, GlobalGAP, Organic)

❗ Usage Notes for CS Products

• Shake or stir thoroughly before spraying
• Do not mix with spreaders/stickers unless recommended
• Apply when leaves are dry, in cool weather; avoid intense sunlight or heavy rain

👉 For best results, combine with proper cultivation practices, correct dosage, and the right product for each crop.

✅ Conclusion

Slow release – long-lasting effect from 10 to 120 days is not an empty promise. It is a proven advantage of CS crop protection products, validated in both agriculture and public health.

Especially under conditions of labor shortages, heavy rainfall, or perennial crops, CS formulations are a worthy investment because they help farmers:

• Maintain sustainable pest and disease control
• Reduce spray frequency
• Protect health, crops, and the environment