Vegetation-derived cues for the selection of oviposition substrates by Anopheles albimanus under laboratory conditions
Oviposition response of gravid Anopheles albimanus Wiedemman (Diptera: Culicidae) females to water containing Brachiaria mutica, Cynodon dactylon, Jouvea straminea, Fimbristylis spadicea, and Cera tophyllum demersum was investigated. Gravid An. albimanus females deposited similar egg numbers in cups containing natural plants in water from natural breeding sites and in cups containing natural plants in distille water. Gravid mosquitoes deposited significantly more eggs in cups containing natural plants in water fron natural breeding sites than in cups containing artificial plants in water from the corresponding natural breeding sites. These results were confirmed in experiments conducted in a wind tunnel, indicating that female response is mediated by chemical cues from plants. Bioassays with organic extracts of all 5 plant species indicated tha these extracts at 100%, 10%, and 1% concentrations had an oviposition repellent effect, while attractiveness wa' observed at 0.1%, 0.01%, and 0.001%. Gas chromatography and mass spectrometry analysis of the organic extracts found in all 5 plants showed a mixture of terpenoid and alcohol compounds, among them: guaiacol phenol, isoeugenol, longifolene, caryophyllene, phenyl ethyl alcohol, and p-cresol. These results suggest tha middle-range volatiles from plants may function as chemical cues for the female's oviposition response in this mosquito species.
| Main Authors: | , , , , , , |
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| Format: | Texto biblioteca |
| Language: | eng |
| Subjects: | Anopheles albimanus, Dípteros, Oviposición, Crianza de insectos, Plantas huéspedes, Análisis químico, Malaria, |
| Online Access: | https://bioone.org/journals/journal-of-the-american-mosquito-control-association/volume-21/issue-4/8756-971X(2006)21%5b344%3aVCFTSO%5d2.0.CO%3b2/VEGETATION-DERIVED-CUES-FOR-THE-SELECTION-OF-OVIPOSITION-SUBSTRATES-BY/10.2987/8756-971X(2006)21[344:VCFTSO]2.0.CO;2.short |
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