Fabrication and Characterization of Prochloraz Nanoemulsion against Penicillium citrinum for the Postharvest Storage of Navel Oranges

• Published in: Langmuir Vol. 37; no. 46; pp. 13757 - 13766
• Main Authors: Chen, Zhiyang, Wang, Xinlian, Shi, Liyin, Liu, Qi, Gao, Yuan, Chen, Wang, Yang, Jinghan, Yuan, Xiaoyong, Feng, Jianguo
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 23.11.2021
• Subjects: Citrus sinensis; Emulsions; Imidazoles; Penicillium
• ISSN: 0743-7463; 1520-5827
• DOI: 10.1021/acs.langmuir.1c02528

Nanoemulsions have become extremely popular water-insoluble pesticide delivery systems in recent years. In this study, prochloraz nanoemulsions were obtained by selecting the mixing ratio of surfactants (6:1, 3:1, 2:1, 1:1, 1:2, 1:3, and 1:6), surfactant concentration, and shearing time. The optimal formula was 10 wt % prochloraz, 6 wt % surfactant (2 wt % CO-100 + 4 wt % CO-360) dissolved in 6 wt % hydrocarbon solvent (S-100A), and deionized water replenished to 100 wt %. This formula meets the quality index standards of the Food and Agriculture Organization. Compared with oil-in-water emulsion (EW), the prochloraz nanoemulsion exhibited higher antifungal activity against Penicillium citrinum in vitro (lower LC50 of 1.17 mg L–1) and in vivo (fewer lesions). In addition, the L02 cells treated with the nanoemulsion had a higher survival rate and lower apoptosis rate at the same concentration. Results showed that the toxicity of the prochloraz nanoemulsion on L02 cells was lower than that of EW. The findings provide an important method for developing an efficient, safe, and environment-friendly nanoemulsion for postharvest fruit storage.