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首页> 外文期刊>Parasitology Research >Larvicidal activity of silver nanoparticles synthesized using Plumeria rubra plant latex against Aedes aegypti and Anopheles stephensi.
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Larvicidal activity of silver nanoparticles synthesized using Plumeria rubra plant latex against Aedes aegypti and Anopheles stephensi.

机译：用红鸡蛋花植物乳胶合成的银纳米颗粒对埃及伊蚊和按蚊的杀幼虫活性。

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摘要

In the present study activity of silver nanoparticles (AgNPs) synthesized using Plumeria rubra plant latex against second and fourth larval instar of Aedes aegypti and Anopheles stephensi was determined. Range of concentrations of synthesized AgNps (10, 5, 2.5, 1.25, 0.625, 0.3125 ppm) and aqueous crude latex (1,000, 500, 250, 125, 62.50, 31.25 ppm) were tested against larvae of A. aegypti and A. Stephensi. The synthesized AgNps from P. rubra latex were highly toxic than crude latex extract in both mosquito species. The LC(50) values for second and fourth larval instars after 24 h of crude latex exposure were 1.49, 1.82 ppm against A. aegypti and 1.10, 1.74 ppm against A. stephensi respectively. These figures were 181.67, 287.49 ppm against A. aegypti and 143.69, 170.58 ppm against A. stephensi respectively for crude latex extract. The mortality rates were positively correlated with the concentration of AgNPs. The characterization studies of synthesized AgNPs by UV-Vis spectrophotometry, transmission electron microscopy (TEM), Particle size analysis (PSA) and zeta potential confirmed the spherical shape and size (32-200 nm) of silver nanoparticles along with stability. Toxicity studies carried out against non-target fish species Poecilia reticulata, the most common organism in the habitats of A. aegypti and A. stephensi showed no toxicity at LC(50) and LC(90) doses of the AgNPs. This is the first report on mosquito larvicidal activity of latex synthesized nanoparticles.
机译：在本研究中，测定了使用红鸡蛋花植物乳胶合成的银纳米颗粒（AgNPs）对埃及伊蚊和按蚊按蚊幼虫第二和第四龄​​的活性。测试了合成的AgNps（10、5、2.5、1.25、0.625、0.3125 ppm）和水性粗胶乳（1,000、500、250、125、62.50、31.25 ppm）的浓度范围，以对抗埃及伊蚊和史蒂芬西虫的幼虫。 。在两种蚊子中，由红杨乳胶合成的AgNps比粗乳胶提取物具有更高的毒性。粗乳胶暴露24小时后，第二龄和第四龄幼虫的LC（50）值分别相对于埃及伊蚊为1.49、1.82 ppm和对斯蒂芬古猿为1.10、1.74 ppm。对于粗胶乳提取物，这些数字相对于埃及伊蚊为181.67、287.49 ppm和针对斯蒂芬伊蚊为143.69、170.58 ppm。死亡率与AgNPs的浓度呈正相关。通过紫外可见分光光度法，透射电子显微镜（TEM），粒度分析（PSA）和Zeta电位对合成的AgNPs进行表征研究，证实了银纳米颗粒的球形和尺寸（32-200 nm）以及稳定性。对非目标鱼类网纹拟南芥（Poecilia reticulata）的毒性研究表明，埃及非典（A. ayypti）和史蒂芬拟南芥（A. stephensi）生境中最常见的生物体对LC（50）和LC（90）剂量的AgNPs没有毒性。这是关于乳胶合成纳米颗粒的蚊幼虫活性的首次报道。

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