title: Mosquito adulticidal and repellent activities of botanical extracts against malarial vector, Anopheles stephensi Liston (Diptera: Culicidae).
abstract: OBJECTIVE
  To determine the adulticidal and repellent activities of different solvent leaf extracts of Eclipta alba (E. alba) and Andrographis paniculata (A. paniculata) against malarial vector, Anopheles stephensi (An. stephensi).
  
  
  METHODS
  Adulticidal efficacy of the crude leaf extracts of E. alba and A. paniculata with five different solvents like benzene, hexane, ethyl acetate, methanol and chloroform was tested against the five to six day old adult female mosquitoes of An. stephensi. The adult mortality was observed after 24 h under the laboratory conditions. The repellent efficacy was determined against An. stephensi mosquito species at three concentrations viz., 1.0, 2.5 and 5.0 mg/cm(2) under laboratory conditions.
  
  
  RESULTS
  Among the tested solvents the maximum efficacy was observed in the methanol extract. The LC(50) and LC(90) values of E. alba and A. paniculata against adults of An. stephensi were 150.36, 130.19 ppm and 285.22, 244.16 ppm, respectively. No mortality was observed in controls. The chi-square values were significant at P<0.05 level. Methanol extract of E. alba and A. paniculata was produce maximum repellency against An. stephensi.
  
  
  CONCLUSIONS
  From the results it can be concluded the crude extract of E. alba and A. paniculata was an excellent potential for controlling An. stephensi mosquitoes.
authors: Division of Vector Biology and Phytochemistry, Department of Zoology, Annamalai University, Tamil Nadu, India. drgovind1979@rediffmail.com
authors: Marimuthu
authors: M
authors: Govindarajan
authors: Rajamohan
authors: R
authors: Sivakumar
mesh_terms: D035685:Andrographis; D000818:Animals; D000852:Anopheles / Q000187:drug effects*; D036601:Eclipta; D007302:Insect Repellents / Q000494:pharmacology*; D007306:Insecticides / Q000494:pharmacology*; D008288:Malaria / Q000517:prevention & control*; D008297:Male; D010936:Plant Extracts / Q000494:pharmacology*; D012997:Solvents; D016019:Survival Analysis
chemical_list: D007302:Insect Repellents; D007306:Insecticides; D010936:Plant Extracts; D012997:Solvents