Abstract
Nano-delivery systems for the active ingredients of pesticides can improve the utilization rates of pesticides and prolong their control effects. This is due to the nanocarrier envelope and controlled release function. However, particles containing active ingredients in controlled release pesticide formulations are generally large and have wide size distributions. There have been limited studies about the effect of particle size on the controlled release properties and biological activities of pesticide delivery systems. In the current study, avermectin (Av) nano-delivery systems were constructed with different particle sizes and their performances were evaluated. The Av release rate in the nano-delivery system could be effectively controlled by changing the particle size. The biological activity increased with decreasing particle size. These results suggest that Av nano-delivery systems can significantly improve the controllable release, photostability, and biological activity, which will improve efficiency and reduce pesticide residues.
Highlights
Pesticides are important for controlling plant diseases and insect pests and to safeguard national food security
Particle size is an important parameter for the controlled release properties of pesticides
The particle size of the Av nano-delivery systems could be controlled by changing the Polyvinyl alcohol (PVA)/gelatin concentration ratio
Summary
Pesticides are important for controlling plant diseases and insect pests and to safeguard national food security. Limited investigations have been conducted on the synthesis and biological activity of pesticide nano-delivery systems for Av with different sizes [31–34]. The present study aimed to prepare various particle sizes of Av nano-delivery systems by emulsion polymerization using PLA and characterize their performance as a safe and biodegradable carrier.
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