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Synergism of mixtures of dicamba and 2,4-dichlorophenoxyacetic acid herbicide formulations on the neotropical fish Cnesterodon decemmaculatus (Pisces, Poeciliidae).
Environ Pollut. 2018 May; 236:33-39.EP

Abstract

Dicamba (DIC) and 2,4-dichlorophenoxyacetic acid (2,4-D) are two of the most applied auxinic herbicides worldwide, both individually and as part of a mixture. However, the toxicity and interactions achieved when applied as a mixture have not yet been characterised. The equitoxic and non-equitoxic acute toxicity exerted by binary mixtures of Banvel® (57.71% DIC) and DMA® (58.4% 2,4-D) on the Neotropical fish Cnesterodon decemmaculatus were evaluated. Results revealed mean values of 1.02 (range, 0.96-1.08) for the toxic unit (TU) that induced 50% mortality (TU50 96 h) to the fish exposed to binary equitoxic mixtures of the commercial formulations Banvel®-DMA®. These results suggest that the mixture is nearly concentration additive. Furthermore, results demonstrated the occurrence of synergistic interaction when non-equitoxic combinations of Banvel®-or DMA®-formulated herbicides were assayed. In this context and regardless of their concentrations, either Banvel®- or DMA®-induced toxicity were synergised by the presence of the counterpart within mixtures. The present study represents the first evidence of the lethality exerted by mixtures of two auxinic herbicides-namely, DIC and 2,4-D-reported to date for fish and other biotic matrices. When C. decemmaculatus is used as the target organism, a synergistic pattern is observed following exposure to a mixture of both herbicides.

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), 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), 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), Argentina. Electronic address: marcelo.larramendy@gmail.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29414355

Citation

Ruiz de Arcaute, C, et al. "Synergism of Mixtures of Dicamba and 2,4-dichlorophenoxyacetic Acid Herbicide Formulations On the Neotropical Fish Cnesterodon Decemmaculatus (Pisces, Poeciliidae)." Environmental Pollution (Barking, Essex : 1987), vol. 236, 2018, pp. 33-39.
Ruiz de Arcaute C, Soloneski S, Larramendy ML. Synergism of mixtures of dicamba and 2,4-dichlorophenoxyacetic acid herbicide formulations on the neotropical fish Cnesterodon decemmaculatus (Pisces, Poeciliidae). Environ Pollut. 2018;236:33-39.
Ruiz de Arcaute, C., Soloneski, S., & Larramendy, M. L. (2018). Synergism of mixtures of dicamba and 2,4-dichlorophenoxyacetic acid herbicide formulations on the neotropical fish Cnesterodon decemmaculatus (Pisces, Poeciliidae). Environmental Pollution (Barking, Essex : 1987), 236, 33-39. https://doi.org/10.1016/j.envpol.2018.01.049
Ruiz de Arcaute C, Soloneski S, Larramendy ML. Synergism of Mixtures of Dicamba and 2,4-dichlorophenoxyacetic Acid Herbicide Formulations On the Neotropical Fish Cnesterodon Decemmaculatus (Pisces, Poeciliidae). Environ Pollut. 2018;236:33-39. PubMed PMID: 29414355.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Synergism of mixtures of dicamba and 2,4-dichlorophenoxyacetic acid herbicide formulations on the neotropical fish Cnesterodon decemmaculatus (Pisces, Poeciliidae). AU - Ruiz de Arcaute,C, AU - Soloneski,S, AU - Larramendy,M L, PY - 2017/06/09/received PY - 2017/10/26/revised PY - 2018/01/17/accepted PY - 2018/2/8/pubmed PY - 2018/6/21/medline PY - 2018/2/8/entrez KW - Banvel(®) KW - DMA(®) KW - Equitoxic mixtures KW - Lethal effects KW - Non-equitoxic mixtures SP - 33 EP - 39 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ. Pollut. VL - 236 N2 - Dicamba (DIC) and 2,4-dichlorophenoxyacetic acid (2,4-D) are two of the most applied auxinic herbicides worldwide, both individually and as part of a mixture. However, the toxicity and interactions achieved when applied as a mixture have not yet been characterised. The equitoxic and non-equitoxic acute toxicity exerted by binary mixtures of Banvel® (57.71% DIC) and DMA® (58.4% 2,4-D) on the Neotropical fish Cnesterodon decemmaculatus were evaluated. Results revealed mean values of 1.02 (range, 0.96-1.08) for the toxic unit (TU) that induced 50% mortality (TU50 96 h) to the fish exposed to binary equitoxic mixtures of the commercial formulations Banvel®-DMA®. These results suggest that the mixture is nearly concentration additive. Furthermore, results demonstrated the occurrence of synergistic interaction when non-equitoxic combinations of Banvel®-or DMA®-formulated herbicides were assayed. In this context and regardless of their concentrations, either Banvel®- or DMA®-induced toxicity were synergised by the presence of the counterpart within mixtures. The present study represents the first evidence of the lethality exerted by mixtures of two auxinic herbicides-namely, DIC and 2,4-D-reported to date for fish and other biotic matrices. When C. decemmaculatus is used as the target organism, a synergistic pattern is observed following exposure to a mixture of both herbicides. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/29414355/Synergism_of_mixtures_of_dicamba_and_24_dichlorophenoxyacetic_acid_herbicide_formulations_on_the_neotropical_fish_Cnesterodon_decemmaculatus__Pisces_Poeciliidae__ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(17)32457-0 DB - PRIME DP - Unbound Medicine ER -