At present, emulsifiable concentrates, wettable powders, suspension concentrates, and water dispersible formulations are widely used in pesticide applications. These traditional formulations have proven effective under specific conditions. However, with growing awareness of environmental protection and health concerns, the demand for safer and more sustainable pesticide options has increased. As a result, conventional formulations now face limitations in terms of safety, efficiency, and environmental impact.
To address these challenges, researchers and pesticide experts are continuously developing new and improved formulations that are more efficient, eco-friendly, and user-safe. Among these innovations, dry suspensions (DF) have gained significant attention and have been successfully developed. In many Western countries, dry suspension formulations are already well-established and widely adopted.
Dry suspensions offer several advantages over traditional dosage forms. First, they disintegrate quickly in water and provide excellent dispersion and suspension properties. For instance, products like Jinrun 7ODF and Tsuibei 5ODF and 8ODF from German companies dissolve instantly in water and form stable suspensions within just six seconds, requiring minimal stirring. They do not settle, cake, or clog nozzles, making them highly convenient for application.
Second, the fine particle size of dry suspensions allows for even adhesion to plant surfaces, forming a dense protective layer. When combined with effective adhesion promoters, the formulation resists washing away by rain. For example, Nongliling 5ODF can control gray mold for up to 10–14 days, significantly longer than traditional bactericides. This extended efficacy makes it an ideal choice for disease prevention, offering protection for over ten days against downy mildew and anthracnose.
Third, the controlled particle size distribution ensures both rapid action and long-lasting effectiveness. It also enhances contact between the active ingredient and the plant surface, improving overall performance and efficiency.
Fourth, dry suspensions are much safer than some wettable powders. Unlike larger particles that may cause localized high concentrations on plant surfaces, dry suspensions reduce the risk of phytotoxicity. For example, Nongli 5ODF is suitable for use even during flowering, which is a critical time for gray mold infection. Products like 8ODF, containing sulfur as the active ingredient, benefit from advanced formulation technology, making them safer and more effective than traditional sulfur-based products. This allows for broader crop applications while maintaining high efficacy with low dosages.
Finally, dry suspensions are environmentally friendly. They eliminate the need for organic solvents, reduce dust, and minimize residue. This not only improves operator safety but also reduces environmental pollution, making them a preferred choice in modern agricultural practices.
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