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For this reason, pesticide experts are constantly pursuing and exploring new formulations of pesticides that are more efficient, safer, and more environmentally friendly. Among them, dry suspension (DF) has been developed successfully. At present, in some Western developed countries, dry suspension agents have developed more mature. In general, dry suspension agents have the following characteristics:
- Fast disintegration in water, good dispersion and suspensibility. For example, the products produced by the German Bath Company, such as Jinrun 7ODF, Tsuibei 5ODF and 8ODF, disintegrate in water immediately and disperse in 6 seconds. A stable suspension is formed with little stirring, and no precipitation occurs. No caking, do not block the nozzle.
- The liquid particles are extremely fine and can adhere evenly to the surface of the crops to form a dense protective film. If a good adhesion promoter is added, the adhesion performance can be enhanced and the rainwater can be washed away. The general bactericidal agent is effective for 5-7 days, but when the 5ODF like Nongliling is used to deal with gray mold, the duration of such dry suspension can be as long as 10-14 days, and the product can be treated as 70% ODF as downy mildew and anthrax. The preventive medicine for the disease also lasted for more than 10 days.
- Reasonable distribution of the particle size of the liquid medicine can not only ensure the immediate effect and persistence of the medicament, but also ensure that the medicament and the surface energy of the crop are fully and completely contacted and the efficacy of the medicament is improved.
——Safety is good, and unlike some WPs, larger particles will form local high concentrations on the crop surface. Dry suspensions such as Nongli 5ODF are not prone to phytotoxicity and can be used even at flowering. The gray mold is most likely to infect at flowering time, so Nongliling 50DF shows its advantage in gray mold; for example, the target is 8ODF, its active ingredient is sulfur, but it is precisely because of this advanced technology. The dosage form has advantages in terms of safety and efficacy, so it can be applied to more crops than sulphur suspension and sulphur powders. When it is used for the control of powdery mildew and various pests, the dosage is small but the effect is good.
——Environment-friendly dosage forms can reduce the pollution of organic solvents; no dust, no adhesion, more full use, safer for operators and the surrounding environment
Dry Suspension: Safe and Environmentally Efficient
At present, emulsifiable concentrates, wettable powders, suspension concentrates, and water repellents are commonly used in the commonly used pesticide formulations. These formulations can play a better role in specific environments and conditions. However, as human beings pay more attention to environmental protection, they have higher requirements for the use of pesticides. Therefore, these dosage forms have their own limitations.