Microwave-assisted synthesis of silver nanoparticles and their inhibitory activity against Rhizoctonia solani on maize

Synthesis of metal nanoparticles through biological method becomes more and more prevalent owing to its incomparable advantages. Eco-friendly silver nanoparticles (AgNPs) were synthesized by Cinnamomum camphora leaf extract through microwave, and spectrophotometry was applied to determine the optimalbiosynthesis process. It contained 20 ml of leaf extract, 4 mM AgNO3, and pH seven over medium-high heat. TEM images displayed that synthesized AgNPs were near spherical and roughly in the range of 6-32 nm. Such synthesized AgNPs exhibited prominent antimicrobial activity against Rhizoctonia solani. The inhibition rate of colony growth and the diameter of inhibition zone reached 81.7% and 20.5 mm when the concentration of AgNPs was 200 mu g/mL.The initial results provide a new idea and method for integrative control of phytopathogens, and it's likely to resolve the perplexing problems in agricultural production.