title: Environmental stress and parasitic infections: II. Effects of gramoxone and hexadrin (pesticides) on the survival characteristics of Fasciola gigantica miracidia.
abstract: Miracidia of Fasciola gigantica have a maximum longevity of 9 h. Miracidial survival was found to be age dependent and the instantaneous mortality rate increased exponentially with miracidial age and pesticide treatment. Mortality of the pesticide-treated miracidia differs significantly from that of the control. The LC50 value for Hexadrin was calculated at 1.93 ppm and for Gramoxone at 0.75 ppm. Dosage-mortality lines when tested statistically show no significant difference between the two pesticides at 95% level of confidence. The toxic effect of the pesticides was enhanced by synergism between the pesticides.
authors.affiliation: Department of Zoology, University of Nigeria, Nsukka.
authors.forename: F C
authors.initials: FC
authors.lastname: Okafor
authors.forename: I B
authors.initials: IB
authors.lastname: Igbinosa
mesh_terms: D000818:Animals; D004357:Drug Synergism; D004732:Endrin / Q000494:pharmacology*; D005209:Fasciola / Q000187:drug effects*; D007814:Larva / Q000187:drug effects; D010269:Paraquat / Q000494:pharmacology*
chemical_list: D004732:Endrin; D010269:Paraquat