00000nam 2200000zi 4500 9.873840 CaOODSP 20241203113649 m o d f cr ||||||||||| 190529e198911##onc #ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- En13-5/89-161E-PDF Day, Kristin E. (Kristin Elizabeth) author. Acute toxicity of isomers of the pyrethroid insecticide deltamethrin and its major degradation products to Daphnia magna / by K.E. Day, R. James Maguire. Burlington, Ontario : National Water Research Institute, Rivers Research Branch, Canada Centre for Inland Waters, November 1989. 1 online resource (11 pages, 2 unnumbered pages). text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 89-161 "RRB 89-84." Title from cover. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "The acute toxicities (4-h, 24-h and 48-h) of eight stereoisomers and four major breakdown products of deltamethrin to D. magna were determined. Parent deltamethrin (isomer 1) was the most toxic, with EC50 values in the range 0.05-1.75 ug/L, concentrations which have been observed in the surface microlayer and subsurface water in field studies. The other three isomers (2-, 3- and 4-deltamethrin) were two- to tenfold less toxic than 1-deltamethrin. Isomers 1', 2', 3' and 4' plus the four breakdown product studied displayed no significant toxicity. Since 1-deltamethrin can be converted in natural water to 2', 3- and 4'- deltamethrin, and since 3-deltamethrin is toxic to D. magna, this isomerization is only a partial detoxification step as far as some aquatic organisms are concerned"--Abstract. Includes abstract and management perspective in English and French. gccst Insecticides gccst Toxicology gccst Aquatic wildlife Maguire, R. J. (R. James) author. Canada. Environment Canada. National Water Research Institute (Canada). Rivers Research Branch. Canada Centre for Inland Waters. NWRI contribution ; 89-161. (CaOODSP)9.844121 PDF 1,013 KB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-89-161-eng.pdf