Recently, Hefei Institute of Physical Science and Technology Institute of Technology and Biological Engineering researcher Wu Zhengyan research group developed a recoverable pH controlled release pesticides, can significantly improve the utilization of pesticides, reduce pesticide use, reduce pesticide caused by agricultural non-point source pollution.
The research group made a composite nanometer material by using diatomaceous earth, ferric oxide and so on, and developed a controlled release and recoverable intelligent pesticide as a carrier. The pesticide has a strong sensitivity to pH, can be controlled by pH to release pesticides, so that the release rate and demand speed synchronization, while the carrier can effectively improve the pesticide in the plant foliar adhesion, thereby significantly reducing the loss and improve pesticide utilization , Extended duration. In addition, the use of external magnetic field can be recycled residual pesticides and carriers, significantly reduce the pesticide on the environment hazards. The technology has the advantages of low cost, high efficiency and environment friendliness, and has wide application prospect.
Pesticides are important data of agricultural production, the prevention and control of pests and weeds, and promote grain yield and high yield has a crucial role. Every year China used pesticides up to one million tons, the average utilization rate of pesticides is only about 30%, most of the pesticides through runoff, leakage, drift and other ways of loss, not only caused pesticide exceeded, and lead to serious agricultural pollution, Human and animal life and health. Therefore, how to improve the utilization rate of pesticides and reduce the amount of pesticide has become the key problem that needs to be solved urgently in our country and even in the world agriculture and environment.