At present, emulsifiable concentrates, wettable powders, suspension concentrates, and water dispersible formulations are widely used in the pesticide industry. These traditional formulations have proven effective under specific conditions, but as environmental awareness grows, so do the expectations for safer and more sustainable pest control solutions. This has led to increasing limitations in conventional dosage forms.
To meet these evolving demands, researchers and pesticide experts are continuously exploring new, more efficient, and eco-friendly formulations. Among them, dry suspensions (DF) have emerged as a promising alternative. In many developed Western countries, dry suspension technology is now well-established and widely adopted. Dry suspensions offer several key advantages:
- **Rapid dispersion and excellent suspension stability**: For example, products like Jinrun 7ODF and Tsuibei 5ODF and 8ODF from German manufacturers disintegrate instantly in water and form a stable suspension within seconds. They require minimal stirring, show no sedimentation or caking, and do not block nozzles, making them ideal for efficient application.
- **Fine particle size ensures even coverage and long-lasting protection**: The ultra-fine particles can adhere uniformly to plant surfaces, forming a dense protective layer. With the addition of good adhesion agents, the formulation resists being washed away by rain. For instance, Nongliling 5ODF, when used against gray mold, provides protection for up to 10–14 days—significantly longer than standard bactericides. Similarly, 70% ODF formulations are effective for over 10 days in preventing diseases like downy mildew and anthracnose.
- **Optimized particle size distribution enhances efficacy**: By ensuring proper particle size, the formulation can deliver both immediate and sustained effects. It also improves contact between the active ingredient and the crop surface, maximizing the overall effectiveness of the pesticide.
- **High safety profile**: Unlike some wettable powders that may cause phytotoxicity due to larger particles, dry suspensions like Nongli 5ODF are less likely to harm plants. This makes them suitable for use even during flowering stages, when crops are most vulnerable. For example, Nongliling 50DF is particularly effective against gray mold, which commonly occurs during flowering. Another example is 8ODF, which contains sulfur and offers superior safety and performance compared to traditional sulfur-based formulations, allowing broader crop applications.
- **Environmentally friendly**: Dry suspensions reduce reliance on organic solvents, minimize dust, and prevent unwanted adhesion. This makes them safer for both operators and the surrounding environment, while also improving product utilization efficiency.
Overall, dry suspensions represent a significant advancement in pesticide formulation, offering improved performance, safety, and environmental compatibility. As the industry continues to evolve, they are expected to play an increasingly important role in sustainable agriculture.
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