Photodynamic control of human pathogenic parasites in aquatic ecosystems using chlorophyllin and pheophorbid as photodynamic substances
| Autor: | Stephanie Wohllebe, Donat-Peter Häder, R. Richter, Peter Richter |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Chlorophyll
Insecticides Mosquito Control Daphnia Lethal Dose 50 chemistry.chemical_compound Phytol Animals Food science Ecosystem Larva Photosensitizing Agents General Veterinary biology Chlorophyllides business.industry Ecology Chlorophyllin Diptera fungi Pest control Water Aquatic animal General Medicine biology.organism_classification Culex Infectious Diseases chemistry Insect Science Parasitology business Methylene blue |
| Zdroj: | Parasitology research. 104(3) |
| ISSN: | 0932-0113 |
| Popis: | When used at low concentrations and added to the water body, water-soluble chlorophyllin (resulting from chlorophyll after removal of the phytol) and pheophorbid (produced from chlorophyllin by acidification) are able to kill mosquito larvae and other small animals within a few hours under exposure of solar radiation. Under laboratory conditions, the use of chlorophyllin/pheophorbid as photodynamic substances for pest control in water bodies promises to be not only effective and ecologically beneficial but also cheap. The LD50 (50% of mortality in the tested organisms) value in Culex sp. larvae was about 6.88 mg/l, in Chaoborus sp. larvae about 24.18 mg/l, and in Daphnia 0.55 mg/l. The LD50 values determined for pheophorbid were 8.44 mg/l in Culex, 1.05 mg/l in Chaoborus, and 0.45 mg/l in Daphnia, respectively. In some cases, chlorophyllin and pheophorbid were also found to be (less) active in darkness. The results presented in this paper show that chlorophyllin is about a factor of 100 more effective than methylene blue or hematoporphyrine, which were tested earlier for the same purpose. It is also much cheaper and, as a substance found in every green plant, it is 100% biodegradable. |
| Databáze: | OpenAIRE |
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