| Autor: | Delphine Rey, Gérard Marigo, Jean-Philippe David, Jean-Claude Meyran |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
0106 biological sciences
0303 health sciences fungi General Medicine Aedes aegypti Biology Pesticide Plant litter biology.organism_classification 01 natural sciences Biochemistry Alder 010602 entomology 03 medical and health sciences chemistry.chemical_compound Alnus glutinosa chemistry Botany Tannic acid Litter Bioassay Ecology Evolution Behavior and Systematics 030304 developmental biology |
| Zdroj: | Journal of Chemical Ecology. 26:901-913 |
| ISSN: | 0098-0331 |
| DOI: | 10.1023/a:1005456124756 |
| Popis: | Decaying alder leaves in water from Alpine Aedes breeding sites, particularly their toxicity to larval Culicidae, were investigated and characterized with comparative toxicological and chemical methods. Bioassays that used third-instar Aedes aegypti as a reference species indicated that the larvicidal effect of crude leaf litter varied with decaying age of the litter, while no toxicity was detected from leaching water of the mosquito breeding sites. Ten-month-old leaf litter was the most toxic. Comparison of the different soluble and insoluble fractions obtained after sequential extraction of decomposed litter allowed us to localize the toxicity factor to an insoluble cell-wall fraction. The toxicity seems to be linked to phenolic activity. It is higher than that found for tannic acid solutions used as a reference to mimic the larvicidal effects of the molecules naturally occurring in decaying litter. The pattern of establishing the larvicidal effect of alder leaf litter in water of Alpine Aedes breeding sites is discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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