Simulação do efeito residual da atrazine em cenoura

Furlan, Renan G; Martins, Juliano Francisco; Santos, Juciléia Irian dos; Alves, P. L. da C. A.

doi:10.1590/s0102-053620160420

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…After eight months of application of atrazine, it was found that the residual effect of the herbicide reduced, on average, 8.3 ton of sugar per hectare. In the study by Furlan et al (2016), the residual effect of atrazine (up to 0.25 kg ha -1 ) has not impacted the percentage of emergency nor the commercial pattern of the carrot.…”

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confidence: 76%

Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition

et al. 2019

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Adjuvants, such as mineral oils, are widely used in the application of herbicides by reducing the drift and evaporation of the droplets and by increasing herbicide uptake by the plant. However, little is known about how mineral oil behaves when in contact with the soil. Thus, the objective of this research was to evaluate the transport of atrazine via leaching with the addition of mineral oil in a soil agricultural under laboratory conditions. To quantify the concentration of the herbicide along the profile of the very clay soil column (30 cm), 14C-atrazine (ring-U-14C) was used with 16,667 Bq of radioactivity per column in volume of 200 mL solution and 0 (control), 1, and 2% mineral oil (v/v) was added in the application volume. Atrazine was applied at the highest commercial dose recommended for sugarcane (4 kg ha-1). After simulation of a precipitation of 200 mm for 48 h, each column was sectioned into six parts of 5 cm and the analytes of each soil sample and the leachate were quantified by liquid scintillation spectrometry. The atrazine remained in the superficial layer of the soil, between 0 and 10 cm of depth, independent of the addition of mineral oil. No atrazine residues were detected in the leachate solution (> 30 cm) in any evaluated treatment. The addition of mineral oil at the time of application of pre-emergence atrazine did not interfere with the transport of this herbicide in the soil profile agricultural via leaching; therefore, the adjuvant may have positive effect only in the herbicide-plant relationship.

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confidence: 76%

Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition

et al. 2019

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“…Environmental conditions, such as the temperature and type of soil, have a direct influence on the half‐life and biodegradation of atrazine, which may remain in the environment for between 2 and 6 months (Swissa et al, 2015). In the soils of natural environments, Furlan et al (2016) reported a half‐life of between 4 and 385 days, which may increase in deep aquifers. In surface waters, the half‐life lasts 10–105 days in aerobic conditions.…”

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confidence: 99%

The Use of Multiple Biomarkers to Assess the Health of Anuran Amphibians in the Brazilian Cerrado Savanna: An Ecotoxicological Approach

Lopes

Benvindo‐Souza

Sotero

et al. 2023

Enviro Toxic and Chemistry

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Changes in the natural landscape and the indiscriminate use of pesticides can have a major impact on aquatic environments and have contributed to the worldwide decline of amphibian populations. In the present study, we sampled tadpoles of three anuran amphibians (Boana albopunctata, Physalaemus cuvieri, and Dendropsophus minutus) from ponds in six different agricultural landscapes of the Brazilian Cerrado savanna and evaluated whether and to what extent genotoxic and mutagenic damage was related to land use (the amount of forest and agricultural remnants, and related physicochemical factors) and the presence of pesticides in the water of the study ponds. We also evaluated the hepatotoxicity in P. cuvieri, which was the most abundant species at five of the six sampling points. Clomazone and Atrazine were the most common pesticides found in the ponds. The B. albopunctata and P. cuvieri tadpoles presented similar patterns of DNA damage among the sampling points. The least DNA damage was found in the D. minutus tadpoles, although this species was present in only one of the study ponds. More binucleated and anucleated cells were observed in B. albopunctata, but there was no significant variation among species in terms of the number of micronuclei or other erythrocytic nuclear abnormalities. Land use and physicochemical factors did not explain the variation in the DNA damage observed in the three anurans. The hepatotoxicity analyses of P. cuvieri revealed the presence of a series of alterations, including the enlargement of the sinusoids, vacuolization of the hepatocytes, the infiltration of inflammatory cells, hepatic steatosis, and dilation of the blood vessels. The interaction between physicochemical factors and the biomarkers analyzed in this study is complex. In particular, it will be important to better elucidate which factors are contributing, either directly or indirectly, to the decline of anuran amphibian populations, especially in threatened biomes, such the the Brazilian Cerrado. In this case, we would encourage further in situ studies that assess the ecotoxicology of the landscape, together with the systematic monitoring of aquatic environments, in order to guarantee the long‐term integrity of amphibian populations, and those of other organisms that play an essential functional role in the ecosystem.

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“…No entanto, a superfície das argilas pode apresentar valores de pH menores (0,5 a 4,0 unidades) do que o pH da solução do solo, o que possivelmente aumenta a sorção da atrazina por estas frações minerais em condições de pH baixo (VONBERG et al 2014 , sendo que na maior dose aplicada dos herbicidas a redução foi de 95,53% em comparação a testemunha. Fato este que ocorreu em trabalho realizado com a cultura da cenoura, onde a massa seca da parte aérea avaliada aos 29 DAA foi reduzida em 60% para maior dose de atrazina (250 g i.a.ha -1 ) (FURLAN et al 2016). Sendo correspondente as avaliações visuais de fitotoxicidade, onde ambos os herbicidas avaliados não diferiram entre si, o que ocorre devido a quantidade de produto absorvido e translocado aumentar à medida que a dose aumenta.…”

Section: Experimento Em Casa De Vegetaçãounclassified

Efeito do Residual de Atrazina e Atrazina + Simazina em Soja

Peruzzo

Silva

et al. 2020

Rev. Ciênc. Agrovet.

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RESUMOA persistência no solo de herbicidas do grupo das triazinas é dependente de basicamente de condições de precipitação e características do solo. Objetivou-se avaliar o efeito residual de diferentes épocas de aplicação e doses de atrazina e atrazina + simazina para a cultura da soja. Conduziram-se experimentos a campo e casa de vegetação. A campo utilizou-se o delineamento de parcelas subdivididas com quatro repetições, sendo o fator A composto por épocas de aplicação 56, 49, 42, 35, 28, 21 e 14 dias antes da semeadura da soja; e fator B, pelos herbicidas atrazina e atrazina + simazina. Para o experimento em casa de vegetação o delineamento inteiramente casualizados, o fator A foi constituído de doses 0, 570, 1.140, 1.715, 2.285, 2.860, 3.430 e 4.000 g i.a.ha -1 ; e fator B pelos herbicidas atrazina e atrazina + simazina. A aplicação dos tratamentos foi realizada com pulverizador costal pressurizado por CO2, após a aplicação realizou-se a semeadura da soja. A campo avaliou-se o estande de plantas, fitotoxicidade, estatura, altura de inserção do primeiro entrenó, teor de clorofila e produtividade. Em casa de vegetação foram avaliados fitotoxicidade, estatura de plantas, área foliar e massa seca. Após os dados foram submetidos a análise de variância e quando significativas as medias foram comparadas pelo teste Tukey a 5%. A simulação de residual dos herbicidas atrazina e atrazina + simazina no solo apresentam comportamento similares quanto aos efeitos na soja. No experimento a campo, devido às altas precipitações ocorridas no intervalo entre as aplicações dos herbicidas e a semeadura da soja, não foram observados efeitos fitotóxicos ou redução na produtividade da cultura. Em casa de vegetação, o aumento da dose residual dos herbicidas no solo incrementou os efeitos tóxicos na soja. ABSTRACTThe soil persistence of herbicides from the triazines group is basically dependent on precipitation conditions and soil characteristics. The objective of this study was to assess the residual effect of different application times and atrazine and atrazine + simazine doses for the soybean crop. Experiments were conducted in the field and greenhouse. In the field, the design of subdivided plots with four replications was used, with factor A composed of application times 56, 49, 42, 35, 28, 21, and 14 days before soybean sowing; and factor B, by the herbicides atrazine and atrazine + simazine. For the greenhouse experiment, the design was completely randomized blocks, factor A doses 0, 570, 1140, 1715, 2285, 2860, 3430, and 4000 g i.a. ha -1 , factor B herbicides atrazine and atrazine + simazine. The application of the treatments was carried out with a CO2 pressurized sprayer, after the application of the soybean. The field was assessed regarding the plant stand, phytotoxicity, stature, height of insertion of the first training, chlorophyll content, and kg ha -1 yield. In the greenhouse, phytotoxicity, plant height, leaf area, and dry mass were assessed. Then, data were submitted to analysis of variance and, when significant, t...

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Simulação do efeito residual da atrazine em cenoura

Cited by 4 publications

References 11 publications

Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition

Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition

The Use of Multiple Biomarkers to Assess the Health of Anuran Amphibians in the Brazilian Cerrado Savanna: An Ecotoxicological Approach

Efeito do Residual de Atrazina e Atrazina + Simazina em Soja

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