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Subramanium Vimaladevi Ayyavu Mahesh Balaji N. Dhayanithi Nattarayan Karthikeyan 《Biologia》2012,67(1):212-216
Mosquito larvicidal and repellent activities of phenolic acids of Chaetomorpha antennina (Bory) Kuetz. against the third instar larvae of Aedes aegypti were investigated. The larval mortality was observed after 24 h exposure. Results of mosquito larvicidal tests revealed that
insoluble bound phenolic acids and soluble conjugated phenolic acid fractions of C. antennina had an excellent inhibitory
effect against A. aegypti and its LC50 values were 23.4 and 44.6 μg ml−1, respectively. The repellency assay of insoluble bound phenolic acids and soluble conjugated phenolic acid fractions of C. antennina, at 10 μg cm−2 concentration gave 100% protection up to 120 min. The results indicate that phenolic acids of C. antennina have a wide spectrum of larvicidal and repellent activities against Aedes aegypti. 相似文献
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K.?Murugan Jiang-Shiou?HwangEmail author K.?Kovendan K.?Prasanna Kumar C.?Vasugi A.?Naresh Kumar 《Hydrobiologia》2011,666(1):331-338
The efficacy of plant extracts (neem tree, Azadirachta indica A. Juss.; Meliaceae) and copepods [Mesocyclops aspericornis (Daday)] for the control of the dengue vector Aedes aegypti L. was tested in the laboratory. Neem Seed Kernel Extract (NSKE) at 25, 50, 100, 200 and 400 ppm caused significant mortality
of Ae. aegypti larvae. Lethal concentrations (LC50 and LC90) were worked out. The LC50 and LC90 values for I to IV larval instars were 111.98, 138.34, 158.93, 185.22 ppm and for pupae was 146.13 ppm, respectively. The
LC90 value of I instar was 372.95 ppm, II instar was 422.77 ppm, III instar was 440.63 ppm, IV instar was 456.96 ppm, and pupae
was 476.92 ppm, respectively. A study was conducted to test the whether the predatory efficiency of copepods on first instars
changed in the presence of NSKE. The percentage of predatory efficiency of copepod was 6.80% in treatments without NSKE and
the percentage of predatory efficiency increased up to 8.40% when copepods were combined with NSKE. This increase in predation
efficiency may caused by detrimental effects of the neem active principle compound (Azadirachtin) on the mosquito larvae.
Our results suggest that the combined application of copepods and neem extract to control Aedes populations is feasible. Repeated application of neem does not cause changes in copepod populations, because neem is highly
degradable in the environment. 相似文献
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Kalimuthu Loganathan Vasugi Chellamuthu Dhanalakshmi Karupuswami Kannan Mohan Udaiyan Suresh Chellasamy Panneerselvam Subrata Trivedi Al Thabiani Aziz Fuad A. Alatawi Alaa M. Munshi Hatem A. Al-Aoh Hamza S. Al-Shehri Aliyah S. Alhawiti 《Entomological Research》2023,53(4):133-147
Mosquitoes serve as reservoirs for viruses and other microorganisms, posing a significant health-related issue for both humans as well as livestock. Control of these deadly disease-producing mosquito vectors is of paramount importance. The chemical analysis of Parmotrema reticulatum was examined by GC–MS. Further, lichen-mediated AgNPs were confirmed through UV–vis spectrophotometry, FTIR, TEM-EDX, and XRD. After 24 h post-treatment, the lichen-synthesized AgNPs showed considerable toxicity against distinct Aedes aegypti instars with LC50 values of 44.61 (I instar), 51.27 (II instars), 61.34 (III instars), 72.95 (IV instar), and 89.84 (pupae) μg/mL, respectively. Further, both P. reticulatum extract and AgNPs greatly reduced the survival and reproductive efficiency of A. aegypti adults. Eventually, in conventional laboratory circumstances, the predatory effectiveness of Gambusia affinis against Ae. aegypti II and III instar larvae were 71.35% and 53.40%, respectively. In antibacterial assays, low concentrations of the P. reticulatum synthesized AgNPs inhibited the development of Pseudomonas aeruginosa and Citrobacter freundii. Surface damage, ROS production, and protein leakage are the antibacterial mechanisms of AgNPs. Overall, the lichen-derived AgNPs can be regarded as newer and safer Ae. aegypti control instruments. 相似文献
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Ivana Prokic Belinda S. Cowling Candice Kutchukian Christine Kretz Hichem Tasfaout Vincent Gache Josiane Hergueux Olivia Wendling Arnaud Ferry Anne Toussaint Christos Gavriilidis Vasugi Nattarayan Catherine Koch Jeanne Lain Roy Combe Laurent Tiret Vincent Jacquemond Fanny Pilot-Storck Jocelyn Laporte 《Disease models & mechanisms》2020,13(11)
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