A Novel Microencapsulation Strategy To Promote The Efficacy And Safety For Aquatic Organisms Of Pyraclostrobin

The broad-spectrum and widely used fungicide pyraclostrobin has high activity against rice blast.Pyraclostrobin is limited to register on rich owing to its toxic to aquatic organisms.By microencapsulation can reduce its to aquatic organisms.The broad-spectrum and widely used fungicide pyraclostrobin has been encapsulated using a coordination assembly between Fe³⁺ and tannic acid to promote its efficacy and environmental safety.The deposition was confirmed by surface zeta potential and energy dispersive spectrometer.Optical,scanning electron microscope,transmission electron microscope and atomic force microscope observations were integrated to characterize the pyraclostrobin-loaded microcapsules?MCs?.These MCs retained a spherical shape when suspended in water but quickly deformed or ruptured after the water evaporated when deposited for one cycle.After sequential deposition,the membrane thickness increased linearly according to transmission electron microscope and atomic force microscope height analysis.MCs deposited for two cycles showed satisfactory efficacy on rice blast,resulting in significantly higher yields at doses of 120 and 180 g ha-1.Moreover,these MCs displayed significantly lower toxicity to Brachydanio rerio,Daphnia magna,Xenopus laevis and Rana nigromaculata.Overall,this novel microencapsulation strategy was capable of promoting the efficacy and environmental safety of pyraclostrobin.The functionality,versatility,manipulability and low cost of this strategy makes it a potential candidate for extensive applications.