期刊
CARBOHYDRATE POLYMERS
卷 300, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2022.120260
关键词
Avermectin; Microcapsules; Photostability; Stimuli -responsive; Safety evaluation
Inefficient use of traditional pesticides causes environmental pollution. Stimuli-responsive pesticide formulations improve efficiency and reduce harm. This study successfully prepared multi-stimuli-responsive polyurea microcapsules and showed their advantages in insecticidal effect and stability.
Inefficient use of traditional pesticides causes serious environmental pollution. Stimuli-responsive pesticide formulations improve the utilization efficiency of target pests and reduce harm to non-target organisms and the environment. Herein, multi-stimuli-responsive avermectin (AVM) polyurea microcapsules (AVM@CM-SS-PU) are prepared by interfacial polymerization with modified carboxymethyl cellulose CMC-SS-NH2 as the wall material and hexadecane as the temperature-responsive core. The microcapsules are 3.90 mu m in size and the encapsulation efficiency of AVM is 88.23 %. The photostability of AVM@CM-SS-PU is 5-times that of AVM solution. The insecticidal effect of AVM solution and AVM emulsifiable concentrate (EC) decreases to 13.3 % and 16.6 %, respectively, after UV irradiation for 180 min, whereas that of AVM@CM-SS-PU still remains at 50.0 %. AVM@CM-SS-PU has better foliar affinity and releases under the stimuli of temperature, glutathione, pH, cellulase, and urease. Hence, it has high insecticidal activity and biosafety. This smart controlled-release pesti-cide formulation provides a promising solution for green agriculture.
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