Comparative toxicity of two different dimethoate formulations in the common toad (Rhinella arenarum) tadpoles
- Martinuzzi, Candela Soledad
- Attademo, Andres Maximiliano
- Peltzer, Paola
- Mac Loughlin, Tomas Mariano
- Marino, Damian Jose Gabriel
- Lajmanovich, Rafael Carlos
DOIAbstract
Dimethoate (D) are among the most commonly used organophosphates insecticides in the world. To evaluate the toxicity of two D formulations were selected as test organisms tadpoles of Rhinella arenarum. This toad species has an extensive neotropical distribution and is easy to handle and acclimate to laboratory conditions. The tadpoles were exposed in an acute assay for 48 h to D soluble concentrates (DSC) and emulsifiable concentrates (DEC). The 48 h-LC50 (95% confidence limits) value of DSC was 57.46 mg L−1 (40.52–81.43) and to DEC was 12.76 mg L−1 (10.39–15.68). These differences in toxicity were statistically significant (p < 0.05). In both formulations, acetylcholinesterase), carboxylesterase, and glutathione-S-transferases enzyme activ...
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