At present, the use of hydrophobic organic pesticides are mostly added to the appropriate co-solvent and synergist, made with a certain active ingredient, a certain size of the preparation can be used, otherwise it can not use the application of a small amount of the original drug scattered in a certain area On, can not make the original drug to give full play to efficacy. However, the solubilization of cosolvents requires an organic solvent with a concentration of more than 10% to have a significant effect, and the cosolvent or synergist itself may be adsorbed and precipitated as a contaminant in the soil, Wipe the emulsion and difficult to remove. It can be seen that the addition of co-solvents and synergists in the application of hydrophobic organic pesticides will cause new pollution to the environment.
Î²-CD and its derivatives HPBCD can form a major guest species with luciferous organic pesticides, and the solubility of pesticides in water increases. Meanwhile, the addition of Î²-CD and HPBCD will not affect the pesticide. Therefore, in such pesticides by adding Î²-CD or HPCD, to improve its solubility, so that pesticides can be more evenly dispersed in a certain area, so that the bioavailability of pesticides is improved. This can reduce the amount of pesticide application, reduce the amount of pesticide into the environment, reduce pesticides on soil, water system pollution. At the same time, Î²-CD and HPBCD are non-toxic, non-susceptible to soil adsorption, are easily transported and biodegraded in the soil, are harmless to the ecosystem and can be used with Î²-CD or HPCD The aqueous solution extracts pesticides and other weakly polar organic pollutants from contaminated soils and then uses microorganisms for degradation. Therefore, Î²-CD and HPBCD can be used to contaminate soil treatment.