This study examined the antifungal effect of the silver nanoparticles–TBS (manioca starch) preparation on Macrophoma theicola isolated from infected mandarin fruits. The results demonstrated that this product with the concentration of 10 ppm could inhibit the spore germination and growth of Macrophoma theicolaunder in vitro conditions. After two days at 28 °C, the diameter of the fungal colony reached only 1.4 (±0.4) cm. The complete inhibitionoccurred at 30 ppm under the same conditions. The in vivo test revealed thatthe silver nanoparticles–TBS preparation at 10 to 90 ppm could inhibit the gowth ofMacrophoma theicola with a rate of 24.4% to 100%, respectively.
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