Pesticide raw materials are processed to form dosage forms with different forms, compositions, and specifications. Each dosage form can also be formulated with formulations containing different components. There are currently 61 pesticide formulations in China, with over 10 commonly used in agricultural production, mainly including suspension concentrate (SC), emulsifiable concentrate (EC), wettable powder (WP), granules (GR), etc.
Research has shown that there are significant differences between different dosage forms of the same pesticide active ingredient, whether in terms of biological activity, ecological toxicity, or environmental behavior. There are also significant differences in the exposure risks brought by different formulations of the same pesticide entering the human body through oral, dermal, respiratory and other exposure pathways. This article aims to comprehensively analyze the current situation of differences between different pesticide formulations based on research progress both domestically and internationally.
Differences in biological activity of different pesticide formulations:
1. Pesticide additives and their physicochemical properties are significant influencing factors for the biological activity differences of different pesticide formulations. For the same spray preparation, the physical characteristics of pesticide solution, including wettability, adhesion, spreading area, etc., can be improved by adding appropriate barrel mixing additives, so as to increase the deposition amount of pesticide solution.
2. The different application methods are also one of the reasons for the differences in biological activity of different pesticide formulations. After the application of different pesticide formulations, the horizontal contact angle between the liquid and the leaves is negatively correlated with the wetting and spreading properties of the pesticide.
3. Research has shown that the higher the dispersion of active ingredients in pesticide formulations, the stronger their permeability to organisms, and the higher their target activity.
4. Different processing processes and technologies for pesticide formulations result in differences in biological activity between formulations. Compared with conventional dosage forms, pesticide microencapsulation can reduce the losses caused by volatilization and degradation of pesticides when exposed to the external environment, thereby improving pesticide utilization efficiency and reducing pesticide toxicity.
Differences in environmental behavior among different pesticide formulations:
There are also significant differences in environmental behavior between different formulations of the same pesticide, which is closely related to the types and processes of additives in the pesticide formulation. Firstly, improving pesticide utilization can reduce the ecological exposure risk of different pesticide formulations. For example, using oil-based solvents, especially mineral oils, in formulations can increase the coverage area of the target surface, thereby reducing pesticide usage.
Post time: Sep-05-2023