Introduction
Harvesting pyrethrum is only half the journey—how the flowers are dried plays a critical role in determining the final quality and market value of the extract. Improper drying can lead to loss of pyrethrin, mold growth, and reduced shelf life. By adopting the right post-harvest practices, farmers can safeguard the potency of their pyrethrum flowers and ensure maximum returns.
1. Harvest at the Right Stage
The drying process starts with timely harvesting. Flowers should be picked:
- When they are fully open but not yet wilted.
- Early in the morning after dew has evaporated.
- Using clean hands or tools to prevent contamination.
Harvested flowers that are too young or over-mature tend to have lower pyrethrin content, reducing quality.
2. Use Shade Drying, Not Direct Sunlight
Direct sunlight can damage delicate flower compounds. Instead:
- Spread flowers thinly on drying mats, trays, or racks.
- Keep them under well-ventilated shade.
- Avoid stacking too many flowers together to ensure airflow.
✅ Shade drying helps preserve the natural pyrethrin levels critical for insecticide production.
3. Ensure Proper Airflow and Ventilation
Good ventilation prevents mold growth during drying. Farmers should:
- Choose drying areas with free air circulation.
- Turn flowers gently every day to promote even drying.
- Keep flowers away from damp or enclosed spaces.
4. Monitor Moisture Levels
Pyrethrum flowers must be dried to the right moisture content for safe storage. Best practices include:
- Ensuring flowers are crisp but not powdery.
- Avoiding over-drying, which causes flowers to lose oil content.
- Storing dried flowers in clean, airtight bags once moisture is reduced to safe levels.
5. Store Carefully After Drying
The final step in quality preservation is proper storage.
- Use airtight, moisture-free containers or bags.
- Keep in a cool, dry place away from direct sunlight.
- Label bags with harvest dates for proper tracking.
Conclusion
Proper drying is essential to maintain the quality, potency, and market value of pyrethrum flowers. By focusing on shade drying, good airflow, correct moisture levels, and safe storage, farmers can safeguard their harvest and deliver top-quality natural insecticide raw material to processors.
With careful post-harvest handling, every flower harvested translates into higher returns and stronger competitiveness in the global market.
