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Toxicity to Rhinella arenarum tadpoles (Anura, Bufonidae) of herbicide mixtures commonly used to treat fallow containing resistant weeds: glyphosate-dicamba and glyphosate-flurochloridone.
Chemosphere. 2020 Apr; 245:125623.C

Abstract

Glyphosate (GLY)-dicamba (DIC) and GLY-flurochloridone (FLC) are herbicide mixtures which are widely used for treating fallow containing glyphosate resistant weeds. The aim of this study was to evaluate the acute toxic effects and the prevailing interactions on stage 36 tadpoles of the anuran species Rhinella arenarum when exposed to equitoxic and non-equitoxic combinations of these herbicide combinations. Experiments were realized using the following combinations of commercial formulations: 48% GLY-based Credit® + 57.71% DIC-based Banvel® and 48% GLY-based Credit® + 25% FLC-based Twin Pack Gold®. GLY-DIC and GLY-FLC equitoxic mixtures were assayed mixing each constituent with an equivalent individual toxicity able to induce the same lethality effect. After 96 h of exposure, GLY-DIC and GLY-FLC equitoxic mixtures presented toxic unit 50 values (TU50 96h) of 1.74 (confidence interval: 1.58-1.92) and 1.54 (confidence interval: 1.46-1.62) respectively, indicating the presence of a weak antagonistic interaction as TU values were greater than 1. For their part, most non-equitoxic combinations of GLY-DIC and GLY-FLC tested did not significantly differ from additivity, the only exception being when DIC and FLC were fixed at 0.33 TUs, where a weak antagonism was observed. Overall, results indicate that the toxicity of both GLY-DIC and GLY-FLC mixtures to R. arenarum tadpoles vary from additive to slightly antagonistic, depending on the proportion of constituting herbicide formulations present in the mixture.

Authors+Show Affiliations

Cátedra de Citología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Calle 64 Nº 3, B1904AMA, La Plata, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.Instituto de Recursos Biológicos, Centro de Investigaciones de Recursos Naturales (CIRN), Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.Cátedra de Citología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Calle 64 Nº 3, B1904AMA, La Plata, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.Cátedra de Citología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Calle 64 Nº 3, B1904AMA, La Plata, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina. Electronic address: marcelo.larramendy@gmail.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31855759

Citation

Ruiz de Arcaute, Celeste, et al. "Toxicity to Rhinella Arenarum Tadpoles (Anura, Bufonidae) of Herbicide Mixtures Commonly Used to Treat Fallow Containing Resistant Weeds: Glyphosate-dicamba and Glyphosate-flurochloridone." Chemosphere, vol. 245, 2020, p. 125623.
Ruiz de Arcaute C, Brodeur JC, Soloneski S, et al. Toxicity to Rhinella arenarum tadpoles (Anura, Bufonidae) of herbicide mixtures commonly used to treat fallow containing resistant weeds: glyphosate-dicamba and glyphosate-flurochloridone. Chemosphere. 2020;245:125623.
Ruiz de Arcaute, C., Brodeur, J. C., Soloneski, S., & Larramendy, M. L. (2020). Toxicity to Rhinella arenarum tadpoles (Anura, Bufonidae) of herbicide mixtures commonly used to treat fallow containing resistant weeds: glyphosate-dicamba and glyphosate-flurochloridone. Chemosphere, 245, 125623. https://doi.org/10.1016/j.chemosphere.2019.125623
Ruiz de Arcaute C, et al. Toxicity to Rhinella Arenarum Tadpoles (Anura, Bufonidae) of Herbicide Mixtures Commonly Used to Treat Fallow Containing Resistant Weeds: Glyphosate-dicamba and Glyphosate-flurochloridone. Chemosphere. 2020;245:125623. PubMed PMID: 31855759.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Toxicity to Rhinella arenarum tadpoles (Anura, Bufonidae) of herbicide mixtures commonly used to treat fallow containing resistant weeds: glyphosate-dicamba and glyphosate-flurochloridone. AU - Ruiz de Arcaute,Celeste, AU - Brodeur,Julie C, AU - Soloneski,Sonia, AU - Larramendy,Marcelo L, Y1 - 2019/12/16/ PY - 2019/09/17/received PY - 2019/12/06/revised PY - 2019/12/09/accepted PY - 2019/12/20/pubmed PY - 2020/4/16/medline PY - 2019/12/20/entrez KW - Agrochemical mixtures KW - Amphibians KW - Contamination KW - Dicamba-based herbicide formulation KW - Flurochloridone-based herbicide formulation KW - Glyphosate-based herbicide formulation SP - 125623 EP - 125623 JF - Chemosphere JO - Chemosphere VL - 245 N2 - Glyphosate (GLY)-dicamba (DIC) and GLY-flurochloridone (FLC) are herbicide mixtures which are widely used for treating fallow containing glyphosate resistant weeds. The aim of this study was to evaluate the acute toxic effects and the prevailing interactions on stage 36 tadpoles of the anuran species Rhinella arenarum when exposed to equitoxic and non-equitoxic combinations of these herbicide combinations. Experiments were realized using the following combinations of commercial formulations: 48% GLY-based Credit® + 57.71% DIC-based Banvel® and 48% GLY-based Credit® + 25% FLC-based Twin Pack Gold®. GLY-DIC and GLY-FLC equitoxic mixtures were assayed mixing each constituent with an equivalent individual toxicity able to induce the same lethality effect. After 96 h of exposure, GLY-DIC and GLY-FLC equitoxic mixtures presented toxic unit 50 values (TU50 96h) of 1.74 (confidence interval: 1.58-1.92) and 1.54 (confidence interval: 1.46-1.62) respectively, indicating the presence of a weak antagonistic interaction as TU values were greater than 1. For their part, most non-equitoxic combinations of GLY-DIC and GLY-FLC tested did not significantly differ from additivity, the only exception being when DIC and FLC were fixed at 0.33 TUs, where a weak antagonism was observed. Overall, results indicate that the toxicity of both GLY-DIC and GLY-FLC mixtures to R. arenarum tadpoles vary from additive to slightly antagonistic, depending on the proportion of constituting herbicide formulations present in the mixture. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/31855759/Toxicity_to_Rhinella_arenarum_tadpoles__Anura_Bufonidae__of_herbicide_mixtures_commonly_used_to_treat_fallow_containing_resistant_weeds:_glyphosate_dicamba_and_glyphosate_flurochloridone_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)32863-2 DB - PRIME DP - Unbound Medicine ER -