Hormesis with glyphosate depends on coffee growth stage

Carvalho, Leonardo Bianco de; Alves, Pedro Luís da Costa Aguiar; Duke, Stephen O.

doi:10.1590/s0001-37652013005000027

Cited by 53 publications

(59 citation statements)

References 25 publications

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“…Hormetic effects of low doses of glyphosate were observed in young plants of eucalyptus, pine (Velini et al, 2008), and coffee (Carvalho and Alves, 2012;Carvalho et al, 2012aCarvalho et al, , 2013a. On the other hand, Tuffi Santos et al (2006) and França et al (2010) found no hormesis with glyphosate on coffee and eucalyptus plants, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Brazilian growers commonly use inter-row mechanical weeding associated with intra-row chemical weed control. Herbicides can reach the fruit plants both directly by accidental application and indirectly by spray drift, as reported on other perennial crops, such as citrus, eucalyptus, and coffee, where similar weed management is used (Tuffi Santos et al, 2006;Gravena et al, 2009;Machado et al, 2010;Carvalho and Alves, 2012;Carvalho et al, 2012aCarvalho et al, , 2013aCarvalho et al, , 2015Silva et al, 2015).…”

Section: Introductionmentioning

confidence: 88%

“…Hormesis has been associated with low doses of glyphosate, particularly in woody plants such as coffee, eucalypts, and Pinus caribea (Velini et al, 2008;Carvalho et al, 2013a;Belz and Duke, 2014). Thus, low doses of glyphosate in plantation culture of some species of woody plants might be harmless or even beneficial.…”

Section: Introductionmentioning

confidence: 99%

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Plant Growth Responses of Apple and Pear Trees to Doses of Glyphosate

et al. 2016

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-Glyphosate is commonly used for intra-row weed management in perennial plantations, where unintended crop exposure to this herbicide can cause growth reduction. The objective of this research was to analyze the initial plant growth behavior of young apple and pear plants exposed to glyphosate. Glyphosate was sprayed on 2-year-old 'Gala' apple and 'Abbè Fetel' pear plants at doses from 18 to 720 g per hectare of acid equivalent (a.e.). The plant height of neither species was not significantly reduced (less than 1%) by any glyphosate dose at 240 days after spraying, whereas the stem diameter and the dry mass of stem and leaves were reduced by 720 g a.e. ha -1 . The glyphosate dose required to reduce the aboveground dry mass by 50% was 162 and 148 g a.e. ha -1 for apple and pear, respectively. Aboveground dry mass was reduced 2% and 6% for apple and pear plants, respectively, at 720 g a.e. ha -1 . Hormesis was not observed in either species at doses down to 18 g a.e. ha -1 . Both species showed low susceptibility to glyphosate; however apple was less susceptible than pear. Keywords: N-phosphonomethyl-glycine, Malus domestica, Pyrus communis, spray drift. RESUMO -Glyphosate é comumente usado para manejo de plantas daninhas na linha de plantio de culturas perenes, onde a exposição não intencional da cultura a esse herbicida pode causar redução do crescimento. O objetivo desta pesquisa foi analisar o comportamento do crescimento inicial de

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 88%

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Plant Growth Responses of Apple and Pear Trees to Doses of Glyphosate

et al. 2016

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“…Tuffi Santos et al (2007b) have observed that eucalyptus plants with 11 to 20% of intoxication caused by the glyphosate drift at 1,440 g ha -1 had an increase of 3.64% in volume when compared to the control without application. Veline et al (2008) Carvalho et al (2013), evaluating the application of glyphosate in doses of 500 g ha -1 , at 45 days after transplanting, saw additive effects attributed to hormesis. Thus, the factors related to the senescence process of the shaded leaves (Saur et al 2000) and the degradation of the photosynthetic apparatus by glyphosate (Mcallister & Haderlie, 1985), associated with low area of exposure to drift, may have allowed the translocation of underdoses of glyphosate for the points of eucalyptus growth, triggering the process of hormesis (Veline et al 2008;Carvalho et al 2012Carvalho et al , 2013Belza & Duke, 2014).…”

Section: Glyphosate Drift In Eucalyptus Plantsmentioning

confidence: 99%

“…Veline et al (2008) Carvalho et al (2013), evaluating the application of glyphosate in doses of 500 g ha -1 , at 45 days after transplanting, saw additive effects attributed to hormesis. Thus, the factors related to the senescence process of the shaded leaves (Saur et al 2000) and the degradation of the photosynthetic apparatus by glyphosate (Mcallister & Haderlie, 1985), associated with low area of exposure to drift, may have allowed the translocation of underdoses of glyphosate for the points of eucalyptus growth, triggering the process of hormesis (Veline et al 2008;Carvalho et al 2012Carvalho et al , 2013Belza & Duke, 2014). For Duke et al (2006), hormesis influenced by glyphosate is due to the decrease Means followed by at least one of the same letter in the column do not differ by Tukey test at 5% probability.…”

Section: Glyphosate Drift In Eucalyptus Plantsmentioning

confidence: 99%

Glyphosate Drift in Eucalyptus Plants

Santos

Ferreira

et al. 2015

Planta daninha

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-With the present study we aim to assess the damage caused to Eucalyptus plants exposed to glyphosate drift in different canopy portions. The drift simulation was carried out through application of 1,080 g ha -1 of glyphosate in five canopy portions (0, 25, 50, 75 and 100% of the low branches), in four areas of cultivation. Areas I and II, plants with 0.91 and 2.98 m, and height of canopy drift exposition of 0.30 and 1.0 m, respectively. In areas III and IV both cultivations were 8.15 m high, varying the height of drift exposition between 2.0 and 2.5 m, respectively. At 30 and 480 days after application (DAA), the survival rate was assessed, and at 300 and 480 DAA diameter at breast height (DBH), height, volume and their respective increment were determined. The medium annual increment (MAI) was determined at 480 DAA. Area I, in which the plants were 0.91 m high, we observed that treatment with 100% of the low branches exposed to drift led to stand reduction of the plants around 18.75 and 38.19% at 30 and 480 DAA, respectively. Areas I and II showed reduction in plant growth in height and DBH, wood volume and MAI, to the extent that there was an increase in the portion of canopy exposed to glyphosate drift. However, in areas III and IV, in which 8.15 m height plants were found, no changes were verified for the evaluated characteristics, regardless of the portion of canopy exposed to glyphosate drift.Keywords: wood production, herbicide, Eucalyptus spp. RESUMO -Objetivou

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Glyphosate Toxicity to Native Nontarget Macrophytes Following Three Different Routes of Incidental Exposure

Sesin

Davy

Stevens

et al. 2020

Integr Envir Assess & Manag

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A major goal of invasive plant management is the restoration of native biodiversity, but effective methods for invasive plant control can be harmful to native plants. Informed application of control methods is required to reach restoration goals. The herbicide glyphosate, commonly applied in invasive plant management, can be toxic to native macrophytes. Our study assessed the response of 2 macrophytes that are endangered in our study area (Ammannia robusta and Sida hermaphrodita) to glyphosate concentrations that mimic incidental exposure from nearby invasive plant control: spray drift of 4 × 10−7% to 5% glyphosate; pulse and continuous immersion in water containing 2 to 41 µg/L glyphosate; and rhizosphere contact with 5%‐glyphosate‐wicked invasive plants. We assessed macrophyte sensitivity at 14‐d postexposure, and quantified abundance of arbuscular mycorrhizal fungi. Glyphosate spray concentrations as low as 0.1% reduced macrophyte growth. Ammannia was more sensitive overall to glyphosate spray than Sida, although sensitivity varied among measured endpoints. Conversely, macrophytes were not affected by immersion in low concentrations of glyphosate or rhizosphere contact with a glyphosate‐wicked plant. Likewise, arbuscular mycorrhizal fungi abundance in roots was similar among glyphosate‐sprayed and control plants. Based on our results, we recommend that invasive plant managers reduce risks to native nontarget plants through implementing measures that limit off‐target spray drift, and consider the feasibility of more targeted applications, such as with wick equipment. Integr Environ Assess Manag 2021;17:597–613. © 2020 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC)

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Hormesis with glyphosate depends on coffee growth stage

Cited by 53 publications

References 25 publications

Plant Growth Responses of Apple and Pear Trees to Doses of Glyphosate

Plant Growth Responses of Apple and Pear Trees to Doses of Glyphosate

Glyphosate Drift in Eucalyptus Plants

Glyphosate Toxicity to Native Nontarget Macrophytes Following Three Different Routes of Incidental Exposure

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