11/5000 Application of surfactants to pesticides

In addition to the general surfactant solubilization, wetting, dispersion, emulsification and so on, the surfactants in pesticides have other special functions.

1. Basic performance

The physical and chemical properties of various pesticide agents are very different, and the surfactants used to prepare preparations are also different, and not all surfactants can be used in pesticides. Surfactants as pesticide additives should have the following basic properties: first, suitable for the purpose of pesticide processing and application, help to give full play to the drug effect; Secondly, it is safe for crops under actual use conditions and has little toxicity to humans, livestock and fish. Secondly, the preparation is stable, does not deteriorate during the effective storage period, and is easy to use and safe; Finally, the resources are abundant and the cost is low. Therefore, surfactants for pesticides came into being, and are often named special trade names, such as agricultural milk 700#, agricultural aid 2 and so on.

2, the synergism of pesticides

In general, surfactants are the non-biological active components of pesticides. However, since pesticides are applied on crops, surfactants in pesticides will have an impact on target organisms. The synergistic effect of surfactants on pesticides is a manifestation of the effective effect of surfactants on target organisms. Surfactants improve the distribution and adhesion of pesticides on the surface of organisms (plant leaf surface and insect body surface), increase the absorption of organisms to agents, and even increase the transport of agents in organisms, thus improving the biological activity of pesticides.

3, the effect on biology

Some surfactants, such as cationic surfactants, have bactericidal effects themselves, and people have used this property to develop plant growth inhibitors and herbicides. Tea saponin is an excellent nonionic surfactant and a kind of plant insecticide. According to CN1139102A, sodium dodecyl benzene sulfonate (potassium) has a strong bacteriolytic effect, and it can be combined with organic nitrogen compounds with biological activity to obtain a broad bactericide with chemical bacteriolytic effect.

Surfactants have a great effect, but not all surfactants can be used in pesticides, because the surfactants in some pesticides have a harmful effect on crops, so the surfactant for pesticides needs to be selected according to the nature of the original drug, but also to consider its impact on the crop object.