On the other side, the maximum average of bacterial count was recorded by control treatment. In accordance with the previous gains, Furno et al. (2004) affirmed that silver nanoparticle (SNP) as a pulse treatment for cut flowers has demonstrated importance as an anti bactericidal agent that could kill 650 species of bacteria in water. Rai et al. (2009) reported that silver nano-particles (SNPs) show efficient antimicrobial property compared to other salts due to their extremely large surface area, which provides better contact with microorganisms. Oraee et al. (2011) reported that nano-silver can be used to decrease bacteria in stem end of cut gerbera and in solution. Similar results were obtained by Kazemi and Ameri (2012) on cut rose; Hatami et al. (2013) on cut carnation, Nemati et al. (2013) on Lilium orientalis. Li et al. (2017) found that the 25 mg l−1 NS pulse treatment effectively inhibited bacterial colonization and biofilm formation on the stem-end cut surface and in the xylem vessels of cut gladiolus spikes.