evaluation of antifungal activity of silver nanoparticles on fusarium oxysporum

Background: silver nanoparticles (agnps) are between 1 nm and 100 nm in size. objectives: different concentrations of agnps were tested in this research to examine antifungal activity on fusarium oxysporum. methods: antifungal activity of agnps on basis of colony formation was evaluated by in vitro petri dish measurement. results: different concentrations of agnps inhibit colony formation of f. oxysporum at different levels. as concentration of agnps was increased, there was a decrease in colony formation. silver nanoparticles at the highest concentration (5000 ppm) did not fully inhibit f. oxysporum colony formation. silver nanoparticles (5000 ppm) and colonize f. oxysporum to decrease to 35% after one hour of exposure, 27% after three hours of expo- sure, and 24% after five hours of exposure. the antifungal activity of agnps to the reduce colony formation was apparent within one hour. the spore extended time exposure to agnps from one to five hours significantly reduced colony formation. conclusions: the antifungal activity of agnps has a great potential for use in control of fungal spores.