Fungicidal activities of chitosan-stabilized copper nanoparticles on Magnaporthe oryzae, Rhizoctonia solani, and Phytophthora capsica

• Published in: Nova biotechnologica et chimica p. e1656
• Main Authors: Nguyen, Thi Kim Anh, Ho, Minh Nhut, Tran, Gia-Buu
• Format: Journal Article
• Language: English
• Published: 11.12.2023
• ISSN: 1339-004X; 1339-004X
• DOI: 10.34135/nbc.1656

Pathogenic fungi are the most common causes of economic loss in crop production. Until now, synthetic fungicides are the most effective tools for management in agriculture, but they cause a severe impact on the environment as well as several side effects for human health. The use of synthetic fungicides is prohibited in organic agriculture; however, sulfur and copper fungicides are still permitted in organic farming. In this study, chitosan-stabilized copper chitosan nanoparticles (CS-CuNPs) were synthesized and characterized via UV-Vis analysis and scanning electron microscopy (SEM). Moreover, fungicidal activities of CS-CuNPs in the range of concentrations (00, 500, and 1000 mg/L) against several plant pathogenic fungi, including Magnaporthe oryzae, Rhizoctonia solani, and Phytophthora capsici, have been assessed via filamentous fugal growth inhibition. The results indicated that the size of CS-CuNPs ranged from 70 to 74 nm with the plasmon absorption peak at 600 nm, which implied the CS-CuNPs were successfully synthesized. Furthermore, CS-CuNPs effectively inhibited the growth of all three fungi at a concentration 1000 mg/L. Among the three species, Rhizoctonia solani was the most susceptible to CS-CuNPs, with the growth inhibitory effect at 100 mg/L. In conclusion, CS-CuNPs demonstrated a strong potential for the elimination of plant pathogenic fungi and further applications in agriculture.