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      저자 : Kh.M. Al-Ghamdi (검색결과 1 건)
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        Chrysanthemum extract and extract prepared silver nanoparticles as biocides to control Aedes aegypti (L.), the vector of dengue fever

        Hamed A. Ghramh,Kh.M. Al-Ghamdi,Jazem A. Mahyoub,Essam H. Ibrahim 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.1

        Mosquitoes play a key role in the transmission of some important diseases. The need for controlling these insectsis critical to reduce their risks to human and domesticated animals. Recently the trend to explore effectivechemical compounds from local plants has begun as a safe means of control. The present study aimed to evaluatethe anti-larval activity of Chrysanthemum extract and the prepared silver nanoparticle (AgNPs) against the Aedesaegypti mosquito, the dengue vector in Saudi Arabia. A series of different concentrations of ethanol extract andextract prepared AgNPs against the fourth-life larvae was tested. The effective concentrations of crude extractand AgNPs ranged from 50 to 250 and 10 to 30 ppm respectively, and the death percentages corresponding tothese concentrations ranged from 18 to 92 and 36 to 96% respectively. According to the LC50 values of treatedlarvae, AgNPs (12.754 ppm) is more effective against A. aegypti mosquito larvae than the crude extract(228.345 ppm) at about 17.9 times. The mixing of the plant extract with the silver nitrate has led to potentiation. This is due to the synergy that occurs between the extract and the silver particles during the reduction process. The compounds in the extract are related to the surface of the particles, increasing the strength of their effects. Itis recommend to separate the active elements in the Chrysanthemum plant and its preparation in the form ofnanoparticles as a promising compound in mosquito control programs with least damage to human kind and theenvironment.

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