关键词: 农药, 纳米微囊, 剂型

Abstract: Pesticide is an important material basis for national food security. Due to the heave usage of pesticide and its low effective utilization rate, serious problems of environmental pollution, excessive pesticide residues of agricultural products, crop phytotoxicity, etc. were occurred. So, improving the effective utilization rate of pesticides is a great strategic demand for the country. The microcapsule pesticide formulations possess the advantages of controlling release, reducing toxicity, preventing light degradation, etc., which could improve the effective availability of pesticides and reduce residue and pollution. But at present, the research of microcapsules mostly focus on micro-scale, as the result of nanocapsules have the properties of small size and large specific surface, so it has conspicuous advantages in improving deposition and distribution in leaves and enhancing bioactivity. To prepare nanoscale microcapsule is a big challenge of technology, this paper analyzed the current situation, features and development of nanocapsules in pesticides, and also discussed manufacturing principle, application conditions, merits and demerits, and exisiting problems in detail. However, the preparation methods still have low coverage rate for the functional components, and can not precisely control the size, uniformity of the nanocapsules, and remain at the laboratory level. Therefore, in view of the different physicochemical property and drug delivery system of pesticides, exploring a gentle and mass-produced method to prepare pesticide nanoparticles is the future development direction.

Key words: pesticide, nanocapsule, formulation