Document Detail


Toxicity of the herbicide glyphosate to Chordodes nobilii (Gordiida, Nematomorpha).
MedLine Citation:
PMID:  18394676     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Nematomorpha (horsehair worms) is a poorly known group of worm-like animals similar to nematodes. Adults are free-living and reproduction takes place in freshwater environments, where preparasitic larvae undergo development. All species have a parasitic juvenil stage and infection may result in the host's death, insects being the most frequent host. Most of the life cycle occurs in freshwater environments, which are often contaminated by different pollutants. Based on the lack of information on the toxicity of herbicides to horsehair worms, the objective of this study is to evaluate the effect of different concentrations of glyphosate (technical grade and formulated product) on Chordodes nobilii (Gordiida, Nematomorpha). Bioassays were performed with embryos and larvae (preparasitic stages), and adults (postparasitic stage). Test organisms were exposed for a short period of time to concentrations ranging between 0.1 and 8 mga.e.l(-1) of glyphosate (technical and formulated). Although embryo development was not inhibited, there was a significant decrease in the infective capacity of larvae derived from eggs that had been exposed to >or= 0.1mg/l. Similar results were obtained for directly exposed larvae. No differences in toxicity were detected between the active ingredient and formulated product. Adult exposed for 96 h to 1.76 mgl(-1) formulated Gly shown a mortality of 50%. Results indicate that C. nobilii is affected at glyphosate concentrations lower than those expected to be found in freshwater environments and those specified in the legislation.
Authors:
Cecilia L Achiorno; Cristina de Villalobos; Lucrecia Ferrari
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-04-03
Journal Detail:
Title:  Chemosphere     Volume:  71     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-04-21     Completed Date:  2008-09-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  1816-22     Citation Subset:  IM    
Affiliation:
National Scientific and Technical Research Council (CONICET), Argentina.
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MeSH Terms
Descriptor/Qualifier:
Aedes / parasitology*
Animals
Embryo, Nonmammalian / drug effects
Glycine / analogs & derivatives*,  toxicity
Helminths / drug effects*,  embryology,  physiology
Herbicides / toxicity*
Larva / drug effects,  parasitology,  physiology
Water Pollutants, Chemical / toxicity*
Chemical
Reg. No./Substance:
0/Herbicides; 0/Water Pollutants, Chemical; 1071-83-6/glyphosate; 56-40-6/Glycine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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