title: The in vitro efficacy of deltamethrin and alpha-cypermethrin against engorged female Haemaphysalis qinghaiensis ticks (Acari: Ixodidae).
abstract: Currently, the most efficient and widely used method for tick control is the application of acaricides, especially deltamethrin and alpha-cypermethrin, two pyrethroids with neurotoxic action. In this study, the in vitro efficacy of deltamethrin and alpha-cypermethrin was assessed on engorged female Haemaphysalis qinghaiensis ticks. An in vitro bioassay (adult immersion test) was carried out to determine the LC (lethal concentration) 50 and LC90 of both compounds, calculated by probit analysis. The LC50 and LC90 values of deltamethrin and alpha-cypermethrin were 5.67 (LC50) and 51.72ppm (LC90), and 166.56 (LC50) and 1366.69ppm (LC90), respectively. This study provides important information on the efficacy of deltamethrin and alpha-cypermethrin for the control of H. qinghaiensis.
authors.affiliation: State Key Laboratory of Veterinary Etiological Biology, Key Lab of Grazing Animal Diseases MOA, Key Laboratory of Veterinary Public Health of Ministry of Agriculture, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province, China.
authors.forename: Miling
authors.initials: M
authors.lastname: Ma
authors.forename: Guiquan
authors.initials: G
authors.lastname: Guan
authors.forename: Qing
authors.initials: Q
authors.lastname: Liu
authors.forename: Zhisheng
authors.initials: Z
authors.lastname: Dang
authors.forename: Aihong
authors.initials: A
authors.lastname: Liu
authors.forename: Qiaoyun
authors.initials: Q
authors.lastname: Ren
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Liu
authors.forename: Youquan
authors.initials: Y
authors.lastname: Li
authors.forename: Ze
authors.initials: Z
authors.lastname: Chen
authors.forename: Junlong
authors.initials: J
authors.lastname: Liu
authors.forename: Jifei
authors.initials: J
authors.lastname: Yang
authors.forename: Hong
authors.initials: H
authors.lastname: Yin
authors.forename: Jianxun
authors.initials: J
authors.lastname: Luo
mesh_terms: D056810:Acaricides / Q000008:administration & dosage; D000818:Animals; D001681:Biological Assay; D005260:Female; D026863:Ixodidae; D007928:Lethal Dose 50; D009570:Nitriles / Q000008:administration & dosage; D011722:Pyrethrins / Q000008:administration & dosage; D011897:Random Allocation
chemical_list: D056810:Acaricides; D009570:Nitriles; D011722:Pyrethrins; C017160:cypermethrin; C017180:decamethrin
keywords: Alpha-cypermethrin; Control; Deltamethrin; Haemaphysalis qinghaiensis; LC(50); LC(90)