A low concentration of atrazine does not influence the acute toxicity of the insecticide terbufos or its breakdown products to <Emphasis Type="Italic">Chironomus tepperi</Emphasis> |
| |
| Authors: | Catherine B Choung Ross V Hyne Mark M Stevens Grant C Hose |
| |
| Institution: | (1) Department of Biological Sciences, Macquarie University, Macquarie University, NSW, 2109, Australia;(2) Ecotoxicology and Environmental Contaminants Section, NSW Department of Environment, Climate Change and Water, 480 Weeroona Rd, Lidcombe, NSW, 2141, Australia;(3) EH Graham Centre for Agricultural Innovation (Industry and Investment NSW and Charles Sturt University), Yanco Agricultural Institute, Private Mail Bag, Yanco, NSW, 2703, Australia;(4) Department of Environment and Geography, Macquarie University, Macquarie University, NSW, 2109, Australia |
| |
| Abstract: | The acute toxicities of the insecticide terbufos and its major breakdown products individually, as binary mixtures, and in
combination with the co-applied herbicide atrazine were evaluated using final instar larvae of the midge Chironomus tepperi. Terbufos, terbufos sulfoxide and terbufos sulfone were highly toxic to C. tepperi with mean 96-h EC50 values of 2.13, 3.64 and 2.59 μg/l, respectively. No interaction was observed between atrazine (25 μg/l)
and terbufos or its breakdown products while the binary mixture of terbufos sulfoxide and terbufos sulfone exhibited additive
toxicity. The high toxicities of terbufos and its environmentally persistent oxidation products suggest that contamination
of aquatic systems with this insecticide pose a threat to aquatic organisms whether or not atrazine is also present. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
