Acute larvicidal toxicity of five essential oils (Pinus nigra, Hyssopus officinalis, Satureja montana, Aloysia citrodora and Pelargonium graveolens) against the filariasis vector Culex quinquefasciatus: Synergistic and antagonistic effects
Language English Country Netherlands Media print-electronic
Document type Journal Article
PubMed
28110082
DOI
10.1016/j.parint.2017.01.012
PII: S1383-5769(16)30465-2
Knihovny.cz E-resources
- Keywords
- Culicidae, Essential oils, Green pesticides, Integrated Vector Management, Mosquito control, St. Louis encephalitis, West Nile,
- MeSH
- Drug Antagonism MeSH
- Pinus chemistry MeSH
- Culex drug effects MeSH
- Elephantiasis, Filarial prevention & control transmission MeSH
- Encephalitis, St. Louis prevention & control transmission MeSH
- Insecticides chemistry pharmacology MeSH
- Mosquito Vectors drug effects MeSH
- Larva drug effects MeSH
- Plant Leaves chemistry MeSH
- Oils, Volatile chemistry pharmacology MeSH
- Plant Oils chemistry pharmacology MeSH
- Pelargonium chemistry MeSH
- Gas Chromatography-Mass Spectrometry MeSH
- Satureja chemistry MeSH
- Drug Synergism MeSH
- Verbenaceae chemistry MeSH
- Hyssopus Plant chemistry MeSH
- West Nile Fever prevention & control transmission MeSH
- Animals MeSH
- Check Tag
- Animals MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Insecticides MeSH
- Oils, Volatile MeSH
- Plant Oils MeSH
Mosquito vector control is facing a number of important and timely challenges, mainly due to the rapid development of pesticide resistance and environmental concerns. In this scenario, screening of botanical resources for their mosquitocidal activity may offer effective and eco-friendly tools against Culicidae vectors. Culex quinquefasciatus Say (Diptera: Culicidae) is a vector of lymphatic filariasis and of dangerous arboviral diseases, such as West Nile and St. Louis encephalitis. In this study, the chemical composition of five essential oils obtained from different plants, namely Pinus nigra J.F. Arnold var. italica (Pinaceae), Hyssopus officinalis L. subsp. aristatus (Lamiaceae), Satureja montana L. subsp. montana (Lamiaceae), Aloysia citriodora Palau (Verbenaceae) and Pelargonium graveolens L'Hér (Geraniaceae), was investigated by GC-MS analysis. Furthermore, it was evaluated their acute toxicity on larvae of C. quinquefasciatus. Then, the most effective oils were selected, in order to focus on the potential synergistic and antagonistic effects, testing them in binary mixtures on C. quinquefasciatus larvae. Results showed that the higher effectiveness was obtained by S. montana subsp. montana essential oil (LC50=25.6μL·L-1), followed by P. nigra var. italica (LC50=49.8μL·L-1) and A. citriodora (LC50=65.6μL·L-1), while the other essential oils showed LC50 values higher than 90μL·L-1. The larvicidal effectiveness can be enhanced by preparing simple binary mixtures of essential oils, such as S. montana+A. citriodora (ratio 1:1), which showed higher larvicidal toxicity (LC50=18.3μL·L-1). On the other hand, testing S. montana+P. nigra (1:1) an antagonistic effect was detected, leading to a LC50 (72.5μL·L-1) higher than the LC50 values calculated for the two oils tested separately. Overall, our results add useful knowledge to allow the employ of synergistic essential oil blends as effective, cheap and eco-friendly mosquito larvicides.
Crop Research Institute Drnovska 507 161 06 Prague 6 Czech Republic
Department of Environmental Biology Sapienza University Rome Italy
Department of Parasitology Heinrich Heine University Düsseldorf Germany
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