Consequências da deriva de clomazone e sulfentrazone em clones de E. grandis x E. urophylla

Takahashi, Ernesto Norio; Alves, Pedro Luís da Costa Aguiar; Salgado, Tiago Pereira; Farias, Marco Antônio; Silva, Ailton C.; Biaggioni, Bruno Torquato

doi:10.1590/s0100-67622009000400010

Cited by 18 publications

(18 citation statements)

References 8 publications

(5 reference statements)

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“…Even with caution, recent papers showed how is common glyphosate contact with leaves closest to soil. Herbicide drift symptoms have also been observed in surrounding areas (Takahashi et al, 2009).…”

Section: Epsps Inhibitor Glyphosatementioning

confidence: 93%

“…Those symptoms can start from the seventh day after spraying (Takahashi et al, 2009). According to Velini et al (2005), leaves formed between planting and spraying demonstrated greater sensitivity to sulfentrazone.…”

Section: Sulfentrazonementioning

confidence: 99%

“…According to Velini et al (2005), leaves formed between planting and spraying demonstrated greater sensitivity to sulfentrazone. Takahashi et al (2009) sprayed sulfentrazone doses 80 days after planting E. urograndis (VCP1 and VCP2 clones). Height and leaf area, respectively, were reduced between 9 and 66 %.…”

Section: Sulfentrazonementioning

confidence: 99%

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Herbicides for weed control in eucalypt

Pereira

Alves²

2015

RBHerbicidas

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-To ensure the maximum forestry productivity the adoption of efficient managements is essential. Weed control is very important, since presence of weeds can lead to competition for key factors to plant development. Weed interference can cause losses of up to 50 % in productivity and over 90 % of reduction in the profitability of forestry areas. Chemical control is widely used in weed management and about 30 % of the total costs of production and up to 50 % of the work force used in eucalypt crop cycle are intended for this purpose. Brazilian forestry sector has great economic expressiveness, but there are few herbicides registered. Chemical weed control should still fit the standards required by eucalypt certifications. The expansion of sector and the economic importance of this crop in Brazil make necessary the development of new herbicides and new spraying techniques to increase herbicides efficiency, new research, as well as encouraging adoption of an integrated weed management plan in eucalypt. Keywords: Eucalyptus; glyphosate; reforestation; weed competition; weed management Resumo -Para garantir a máxima produtividade florestal, a adoção de um manejo eficiente é essencial. O controle de plantas daninhas é muito importante, já que a presença dessas pode ocasionar competição por fatores fundamentais ao desenvolvimento das plantas. A interferência das plantas daninhas pode ocasionar perdas de até 50 % na produtividade e mais de 90 % de redução na rentabilidade das áreas florestais. O controle químico é amplamente utilizado no manejo das plantas daninhas, e cerca de 30 % dos custos totais de produção e mais de 50 % da mão-de-obra utilizada na cultura do eucalipto são destinadas para esse propósito. O setor florestal tem uma grande expressividade econômica, mas poucos herbicidas são registrados. O controle químico ainda deve se encaixar aos padrões requeridos pelas certificadoras. A expansão do setor e a importância econômica do eucalipto no Brasil fazem necessário o desenvolvimento de novos herbicidas, novas tecnologias de aplicação, novas pesquisas, bem como a adoção de um plano de manejo integrado de plantas daninhas em eucalipto.

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Section: Epsps Inhibitor Glyphosatementioning

confidence: 93%

Section: Sulfentrazonementioning

confidence: 99%

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Herbicides for weed control in eucalypt

Pereira

Alves²

2015

RBHerbicidas

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“…The reduction in the ratio of leaf tissue can be attributed to the application of clomazone, since this one results in photo-oxidation and destruction of chlorophyll induced by the absence of carotenoids (Vidal, 1997), directly interfering with photosynthesis and causing less plant dry matter production (Takahashi et al, 2009). However, in some species, decline was observed in tissue integrity in the first application of the herbicide, demonstrating an "alarm stage" at the beginning of the disorder characterized by loss of stability of the structures (biomembrane proteins) and the functions that maintain the vital activities (energy-producing metabolism and biochemical processes) (Larcher, 2006).…”

Section: Figure 2 -Cross Section Of Leaves Of Forest Species: Cedrelamentioning

confidence: 99%

Structural Evaluation of Damage Caused by Herbicide Clomazone in Leaves of Arborescent Species Native to Brazil

et al. 2017

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Herbicide clomazone is highly soluble in water, which increases the risk of leaching, resulting in contamination of sources of groundwater and waterways, affecting non-target organisms, with possible degradation of riparian areas. The objective of this work was to investigate the possible anatomical modifications of the leaf tissue of twelve arborescent species native to Brazil grown in soil contaminated by clomazone, in order to microscopically characterize leaf damage caused by the herbicide, and investigate whether the structural damage precedes visible damage. Through micro morphometrics, the thickness and the area occupied by the tissues were measured in a cross section of the leaves of the forest species: adaxial and abaxial epidermis, palisade and spongy parenchyma. It has been found that the species evaluated were affected by the presence of the pesticide in the soil, and the variable with the largest negative changes was the spongy parenchyma. Among the species, Inga marginata, Schizolobium parahyba and Handroantus. serratifolius had higher tolerance to the herbicide, demonstrating potential for studies on the mechanism by which these plants exert such tolerance. Overall, the results revealed that the forest species studied demonstrate significant alterations in leaf anatomy in response to the presence of residues of herbicide clomazone in the soil, even in leaves with no visible lesions.

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“…O uso generalizado do produto para o controle químico de plantas daninhas em diversas etapas do processo produtivo aumenta o risco da deriva acidental, pois as pulverizações podem ser feitas sob as mais diferentes condições climáticas. Normalmente podem ser feitas de duas a cinco pulverizações de glyphosate por ano na cultura, sem considerar o risco de intoxicação por aplicações em áreas adjacentes (Takahashi et al, 2009). …”

Section: Introductionunclassified

Sintomas da intoxicação inicial de Eucalyptus proporcionados por subdoses de glyphosate aplicadas no caule ou nas folhas

Salgado¹,

Alves

Kuva³

et al. 2011

Planta daninha

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Com o objetivo de avaliar os sintomas de intoxicação causados pela aplicação de glyphosate, foi montado um estudo composto por quatro ensaios com aplicações de glyphosate (360 g e.a. L-1) em eucalipto. Em todos os ensaios, mudas foram transplantadas em vasos de 5,0 L. Nos ensaios 1 e 2, foram aplicados volumes crescentes de solução de glyphosate no caule do eucalipto. No ensaio 1, a solução de 3% (v/v) foi aplicada nos volumes de 0, 1, 5, 10, 20, 40, 80 e 160 µL de calda por planta e, no segundo, a solução de glyphosate a 2% (v/v) foi aplicada nos volumes de 0, 1, 5, 15, 30, 60, 90, 120 e 150 µL de calda por planta. Nos ensaios 3 e 4, foram feitas aplicações de glyphosate sobre as plantas de eucalipto. No ensaio 3, as doses foram de 0, 7,2.10-7, 7,2.10-6, 7,2.10-5, 7,2.10-4, 7,2.10-3, 7,2.10-2, 7,2.10-1, 7,2, 72, 360 e 720 g e.a. de glyphosate ha-1 e, no ensaio 4, de 0, 9, 18, 36, 72, 144, 288, 432, 576, 720, 1.080, 1.440 e 2.160 g e.a. de glyphosate ha-1. Nos quatro ensaios foi utilizado o delineamento DIC, com três repetições. Nas plantas, foram avaliadas a altura, a área foliar e a matéria seca de caule e folhas. Os resultados obtidos foram submetidos a análises de regressão. Quando aplicadas no caule, doses de 40,78 e 51,41 µL de calda por planta de glyphosate a 3 e 2% (v/v), respectivamente, nos ensaios 1 e 2, foram suficientes para redução média de 50% das características estudadas. Nas aplicações sobre as folhas, houve maior sensibilidade das plantas mais desenvolvidas. Para redução média de 50% nas variáveis analisadas, foram necessárias doses de 277,4 e 143,3 g e.a. de glyphosate ha-1 nos ensaios 3 e 4, respectivamente.

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Consequências da deriva de clomazone e sulfentrazone em clones de E. grandis x E. urophylla

Cited by 18 publications

References 8 publications

Herbicides for weed control in eucalypt

Herbicides for weed control in eucalypt

Structural Evaluation of Damage Caused by Herbicide Clomazone in Leaves of Arborescent Species Native to Brazil

Sintomas da intoxicação inicial de Eucalyptus proporcionados por subdoses de glyphosate aplicadas no caule ou nas folhas

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