期刊名称：Journal of Entomological and Acarological Research
印刷版ISSN：2038-324X
电子版ISSN：2279-7084
出版年度：2014
卷号：46
期号：2
页码：59-65
DOI：10.4081/jear.2014.1920
语种：English
出版社：PAGEPress Publications
摘要：Silver nanoparticles (AgNPs) were synthesized from the latex of the medicinally important plants Euphorbia milii , Euphorbia hirta , Ficus racemosa and Jatropha curcas . Synthesized AgNPs were characterized by UV-Vis spectrophotometry, scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, Fourier transformed infrared spectroscopy, particle size, and zeta potential analysis. Potency of latex and latex-synthesized AgNPs was evaluated against the 2 nd and 4 th instar larvae of Aedes aegypti and Anopheles stephensi . The lowest lethal concentration 50 (LC 50 ) value among the different types of plant latex studied was observed for latex of E. milii (281.28±23.30 and 178.97±37.82 ppm, respectively) against 2 nd instar larvae of Ae. aegypti and An. stephensi. E. milii latex-synthesised AgNPs showed a high reduction in LC 50 compared with its latex; i.e. , 8.76±0.46 and 8.67±0.47 ppm, respectively, for 2 nd instars of Ae. aegypti and An. stephensi . LC 50 values of AgNPs synthesized using the latex of E. hirta , F. racemosa and J. curcas were lower than those of the latex of the respective plants; i.e. , 10.77±0.53, 9.81±0.52, 12.06±0.60 and 8.79±0.51, 9.83±0.52, 9.60±0.51 ppm, respectively, for 2 nd instars of An. stephensi and Ae. aegypti . Similarly, as compared with the plant latex, lower LC 50 values were reported for latex-synthesized AgNPs against 4 th instars of Ae. aegypt and An. stephensi. Results showed that all the types of plant latex investigated have the potential to convert silver nitrate into AgNPs showing a spectrum of potent mosquito larvicidal effects, indicating the possibility of further exploration of the bioefficacy of latex and latex-synthesized AgNPs against vectors of public health concerns.
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