Eficácia do carfentrazone-ethyl no controle de plantas aquáticas latifoliadas em caixas-d'água

Carvalho, Fernando Tadeu de; Velini, Edivaldo Domingues; Negrisoli, E.; Rossi, Caio Vitagliano Santi

doi:10.1590/s0100-83582005000200018

Cited by 11 publications

(8 citation statements)

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“…Additionally, Roundup 1 is sprayed directly on water to control emergent aquatic plants in many countries (Giesy et al 2000). In Brazil, besides the extensive use in rice and soybean cultures (Rodrigues and Almeida 2005), it is also applied to control aquatic weeds including Eichhornia crassipes, Pistia stratiotes and Salvinia auriculata (Carvalho et al 2005). Moreover, the small wetlands occurring within the herbicide's target sites are usually directly contaminated during aerial application, resulting in high potential exposure and effects for its constituent biota (Thompson et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Oxidative stress biomarkers and heart function in bullfrog tadpoles exposed to Roundup Original®

et al. 2007

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Oxidative stress biomarkers, in vivo heart rate (f (H)), and contraction dynamics of ventricle strips of bullfrog (Lithobates catesbeiana) tadpoles were evaluated after 48 h of exposure to a sub-lethal concentration (1 ppm) of the herbicide Roundup Original (glyphosate 41%). The activities of the antioxidant enzymes superoxide dismutase and catalase were increased in the liver and decreased in muscle, while oxidative damage to lipids increased above control values in both tissues, showing that the generation of reactive oxygen species and oxidative stress are involved in the toxicity induced by Roundup. Additionally, tadpoles' hyperactivity was associated with tachycardia in vivo, probably due to a stress-induced adrenergic stimulation. Ventricle strips of Roundup-exposed tadpoles (R-group) presented a faster relaxation and also a higher cardiac pumping capacity at the in vivo contraction frequency, indicating that bullfrog tadpoles were able to perform cardiac mechanistic adjustments to face Roundup-exposure. However, the lower maximal in vitro contraction frequency of the R-group could limit its in vivo cardiac performance, when the adrenergic-stimulation is present. The association between the high energetic cost to counteract the harmful effects of this herbicide and the induction of oxidative stress suggest that low and realistic concentrations of Roundup can have an impact on tadpoles' performance and success, jeopardizing their survival and/or population establishment.

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Section: Discussionmentioning

confidence: 99%

Oxidative stress biomarkers and heart function in bullfrog tadpoles exposed to Roundup Original®

et al. 2007

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“…No Brasil, no momento, não há nenhum herbicida registrado para controle de aguapé, e a maioria das pesquisas trabalha com herbicidas em condições controladas ou em pequenos corpos hídricos sem fluxo de água. As plantas de P. stratiotes são espécies cosmopolitas com ampla distribuição por todo o planeta (University of Florida, 2004 apud Carvalho et al, 2005). P. stratiotes é uma planta aquática perene, flutuante livre, nativa da América Tropical e que se propaga por estolões.…”

Section: Resultsunclassified

Avaliação da qualidade da água dos mananciais na ilha de Fernando de Noronha

Sobrinho¹

2008

Ambi-Agua

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“…O controle químico é um método promissor e pode ser feito de forma segura como glyphosate (maRtinS et al, 2002;neveS et al, 2002;CaRvalHo et al, 2005) e imazamox (WeRSal;madSen, 2007).…”

Section: Introductionunclassified

Translocação dos herbicidas glyphosate e imazamox em plantas de aguapé

et al. 2013

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RESUMOEntre as diversas plantas daninhas encontradas em ambientes aquáticos, a Eichhornia crassipes é uma das principais, sendo espécie indesejável para muitas atividades. O objetivo deste trabalho foi avaliar a translocação de glyphosate e imazamox em plantas de E. crassipes. Foram estudados oito intervalos de tempo para o corte das folhas que receberam os herbicidas: 2, 4, 6, 8, 12 e 24 horas após a aplicação (HAA) dos produtos, além de um tratamento sem corte das plantas (testemunha). Utilizaram-se glyphosate na dose de 2.160 g e.a. ha -1 (produto comercial -Rodeo) + 0,5% v v -1 do espalhante adesivo aterbane e imazamox na dose de 290,4 g i.a. ha -1 (produto comercial -Clearcast). Os tratamentos foram instalados em um delineamento experimental inteiramente casualizado com quatro repetições. O glyphosate apresentou um controle insatisfatório quando realizado os cortes das folhas em todos os períodos avaliados. O herbicida imazamox não proporcionou controle em até 12 HAA, enquanto que a partir de 24 HAA do herbicida o controle foi eficiente. Não houve uma grande mobilidade da molécula de glyphosate nas plantas de aguapé, sendo necessário um período superior a 24 horas para uma translocação satisfatória. Já para o imazamox um tempo de mínimo de 24 horas após a aplicação do herbicida foi suficiente para que ocorresse a translocação e um posterior controle. PALAVRAS-CHAVE: Planta aquática, planta daninha, tecnologia de aplicação, Eichhornia crassipes. ABSTRACT GLYPHOSATE AND IMAZAMOX TRANSLOCATION IN WATER HYACINTH PLANTS.Eichhornia crassipes is one of the main weeds found in aquatic environments, being undesirable for many activities. The aim of this study was to evaluate the translocation of glyphosate and imazamox in E. crassipes. Eight intervals were studied for cutting leaves that received herbicides: 2, 4, 6, 8, 12 and 24 hours after application (HAA), and a treatment with no cutting (untreated). The glyphosate dose was 2,160 g a.e. ha -1 (commercial product -Rodeo) + 0.5% v v -1 Aterbane adhesive spreader and imazamox at 290.4 g i.a. ha -1 (commercial product -Clearcast). The treatments were installed in a completely randomized design with four replications. Glyphosate showed a bad control for all the periods of leaf cutting. The imazamox did not provide control within 12 HAA, while from 24 HAA onward the control was effective. There was not a great mobility of the glyphosate molecule in water hyacinth plants, a period above 24 hours being needed for a satisfactory translocation. For imazamox at least 24 hours were needed after herbicide application for the translocation to occur along with subsequent control.

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Eficácia do carfentrazone-ethyl no controle de plantas aquáticas latifoliadas em caixas-d'água

Cited by 11 publications

References 0 publications

Oxidative stress biomarkers and heart function in bullfrog tadpoles exposed to Roundup Original®

Oxidative stress biomarkers and heart function in bullfrog tadpoles exposed to Roundup Original®

Avaliação da qualidade da água dos mananciais na ilha de Fernando de Noronha

Translocação dos herbicidas glyphosate e imazamox em plantas de aguapé

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