title: Individual and joint toxicity of three chloroacetanilide herbicides to freshwater cladoceran Daphnia carinata.
abstract: Individual and joint toxicity of three chloroacetanilide herbicides to a freshwater cladoceran were studied. The 48 h-LC50 values of alachlor, acetochlor and butachlor to Daphnia carinata Dc42 were 11.1, 11.8 and 3.45 mg L(-1), respectively. The toxicity was significantly (p < 0.05) related to hydrophobicity. The additive indexes of binary mixtures of three herbicides were less than zero and it showed antagonism. The body length of D. carinata treated with high concentration of herbicides was shorter than that of control group significantly (p < 0.05). It suggests that joint actions must be considered when assessing the acute toxicity of chloroacetanilide herbicides to D. carinata.
authors.affiliation: Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institution, South China Agricultural University, Guangzhou, 510642, China. scauhhz@scau.edu.cn
authors.forename: Hongzhi
authors.initials: H
authors.lastname: He
authors.forename: Guikui
authors.initials: G
authors.lastname: Chen
authors.forename: Jing
authors.initials: J
authors.lastname: Yu
authors.forename: Jinbo
authors.initials: J
authors.lastname: He
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Huang
authors.forename: Shufeng
authors.initials: S
authors.lastname: Li
authors.forename: Qiu
authors.initials: Q
authors.lastname: Guo
authors.forename: Tianhong
authors.initials: T
authors.lastname: Yu
authors.forename: Huashou
authors.initials: H
authors.lastname: Li
mesh_terms: D000081:Acetamides / Q000633:toxicity; D000083:Acetanilides / Q000633:toxicity; D000818:Animals; D002681:China; D003621:Daphnia / Q000187:drug effects* / Q000254:growth & development; D004357:Drug Synergism; D004784:Environmental Monitoring / Q000379:methods*; D005618:Fresh Water / Q000737:chemistry*; D006540:Herbicides / Q000633:toxicity*; D014052:Toluidines / Q000633:toxicity; D023382:Toxicity Tests, Acute; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D000081:Acetamides; D000083:Acetanilides; D006540:Herbicides; D014052:Toluidines; D014874:Water Pollutants, Chemical; C000188:alachlor; C043377:acetochlor; C054409:butachlor