The efficiency of biosynthesized Zinc oxide nanoparticles by Fusarium sp. against Saprolegnia parasitica isolated from common carp eggs in fish hatchery
Saprolegnia spp. infect common carp (Cyprinus carpio L.) eggs in hatcheries. Therefore, this study aimed to evaluate the antifungal effect of biosynthesized zinc oxide nanoparticles (ZnNPs) against Saprolegnia spp. as an eco-friendly treatment. Biosynthesized ZnNPs were characterized using atomic force microscope (AFM), size distributor and Ultra Violate-Visible spectrometer (Uv-Vis), and Scanning Electron Microscope (SEM). Biosynthesized (ZnNPs) had a spherical shape with diameters ranging 10-70 nm. Antifungal activity was tested by fungal radial growth inhibition on corn meal agar. The highest concentration of 100 ppm of ZnNPs showed a remarkable inhibition rate of 79% against Saprolegnia spp., demonstrating similar efficiency as the positive control i.e. malachite green in the inhibition percentage rate of fungal growth. This study showed that biosynthesized zinc oxide nanoparticles had a significant antifungal effect (P<0.05) and can be used as an alternative option to control Saprolegnia spp. in fish hatcheries.
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