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So, the current study was aimed at using the flower extract of <jats:italic>Wedelia urticifolia<\/jats:italic> for synthesizing AgNPs with antibacterial properties. The AgNPs were produced by adding the extract to three different AgNO<jats:sub>3<\/jats:sub> concentrations (1, 10, and 100\u2009mM) in nine possible flower extract to metal salt ratios (9:1, 8:2, 7:3, 6:4, 5:5, 4:6, 3:7, 2:8, and 1:9). The formation of brown color and the presence of a peak at 431\u2009nm in the UV\u2013Vis spectrum of the colloidal solution indicates the synthesis of AgNPs, which were also characterized by dynamic light scattering (DLS), Fourier transform infrared spectroscopy, X\u2010ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy\u2010dispersive X\u2010ray spectroscopy. The DLS results exposed that the smallest sized AgNPs were obtained in 10\u2009mM AgNO<jats:sub>3<\/jats:sub> solution and 4E6M was the optimized extract to metal salt solution ratio. The characterization techniques revealed that the synthesized AgNPs were spherical shaped and crystalline with a diameter of less than 30\u2009nm. Furthermore, the synthesized nanoparticles were tested against two Gram\u2010positive (<jats:italic>Klebsiella pneumonia<\/jats:italic> and <jats:italic>Staphylococcus aureus<\/jats:italic>) and two Gram\u2010negative (<jats:italic>Pseudomonas aeruginosa<\/jats:italic> and <jats:italic>Escherichia coli<\/jats:italic>) bacterial strains for their antibacterial efficiency. Although the studied strains showed limited growth, overall, the effect of nanoparticles was found to be insignificant. It is concluded that the current study is advantageous over other previous studies because the AgNPs were synthesized at room temperature from 10\u2009mM AgNO<jats:sub>3<\/jats:sub> concentration in only 2 hours. Additionally, the present work is simple, ecofriendly, and in\u2010expensive.<\/jats:p>","DOI":"10.1002\/jemt.23499","type":"journal-article","created":{"date-parts":[[2020,4,19]],"date-time":"2020-04-19T01:56:20Z","timestamp":1587261380000},"page":"1085-1094","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Silver nanoparticles synthesis using <i>Wedelia urticifolia<\/i> (Blume) DC. flower extract: Characterization and antibacterial activity evaluation"],"prefix":"10.1002","volume":"83","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9217-7000","authenticated-orcid":false,"given":"Mohd Yousuf","family":"Rather","sequence":"first","affiliation":[{"name":"Department of Ecology and Environmental Sciences Pondicherry University  Puducherry India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maroli","family":"Shincy","sequence":"additional","affiliation":[{"name":"Department of Ecology and 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