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Assessment of the impact of chlorophyll derivatives to control parasites in aquatic ecosystems.

Abstract
Several research groups have studied new biopesticides which are less toxic to the environment and capable of controlling the vectors of parasitic diseases, especially in aquatic ecosystems. Pest control by photodynamic substances is an alternative to chemical or other measures, with chlorophyll and its derivatives as the most studied substances supported by their easy availability and low production costs. The impact of chlorophyll derivatives on four different species, a small crustacean (Daphnia similis), a unicellular alga (Euglena gracilis) and two species of fish (Astyanax bimaculatus and Cyprynus carpio) were tested under short-term conditions. In addition, the effects of long-term exposure were evaluated in D. similis and E. gracilis. In short-term tests, mortality of D. similis (EC50 = 7.75 mg/L) was most strongly affected by chlorophyllin, followed by E. gracilis (EC50 = 12.73 mg/L). The fish species showed a greater resistance documented by their EC50 values of 17.58 and 29.96 mg/L in C. carpio and A. bimaculatus, respectively. A risk quotient is calculated by dividing an estimate of exposure by an estimate of effect. It indicated that chlorophyll derivatives can be applied in nature to control the vectors of parasitic diseases under short-term conditions, but long-term exposure requires new formulations.
AuthorsGilmar Sidnei Erzinger, Suellen Carolina Souza, Luciano Henrique Pinto, Roberto Hoppe, Lineu Fernando Del Ciampo, Ozair Souza, Cláudia Hack Gumz Correia, Donat-Peter Häder
JournalEcotoxicology (London, England) (Ecotoxicology) Vol. 24 Issue 4 Pg. 949-58 (May 2015) ISSN: 1573-3017 [Electronic] United States
PMID25750014 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Biological Control Agents
  • Chlorophyllides
  • chlorophyllin
Topics
  • Animals
  • Biological Control Agents (toxicity)
  • Chlorophyllides (toxicity)
  • Daphnia (drug effects)
  • Dose-Response Relationship, Drug
  • Euglena gracilis (drug effects)
  • Fishes (metabolism)
  • Lethal Dose 50

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