Folidol 600 is a commercial product widely used in Brazilian
agriculture and contains methyl parathion as the active ingredient.
It is used in aquaculture ponds to eliminate the larvae of aquatic
insects that are predators of fish larvae [2,6]. This product usually
results different forms of environmental contamination, as well as
accidents involving man and native fauna [6,7]. Thus, contamination
by pesticides is a serious water pollution problem, which
may cause an environmental imbalance and increase the incidence
of poisoning of fish and other aquatic species [5,6,8].
Studies to evaluate the toxicity of chemicals released into water
are useful to assess the impact they may have on the aquatic biota.
Several kinds of physiological endpoints can be used for the study
Folidol 600 is a commercial product widely used in Brazilianagriculture and contains methyl parathion as the active ingredient.It is used in aquaculture ponds to eliminate the larvae of aquaticinsects that are predators of fish larvae [2,6]. This product usuallyresults different forms of environmental contamination, as well asaccidents involving man and native fauna [6,7]. Thus, contaminationby pesticides is a serious water pollution problem, whichmay cause an environmental imbalance and increase the incidenceof poisoning of fish and other aquatic species [5,6,8].Studies to evaluate the toxicity of chemicals released into waterare useful to assess the impact they may have on the aquatic biota.Several kinds of physiological endpoints can be used for the study
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