Differential Response of Clones of Eucalypt to Glyphosate1

Carvalho, Leonardo Bianco de; Alves, Pedro Luís da Costa Aguiar; Costa, Flávia Regina da

doi:10.1590/0100-67622015000100017

Cited by 13 publications

(9 citation statements)

References 30 publications

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“…When exposed to glyphosate drift, the clone of E. urophylla is more tolerant when compared to clones of E. grandis or hybrids of E. urophylla x E. grandis (Tuffi-Santos et al, 2007). Carvalho et al (2015) also confirm that hybrid clones of E. urophylla x E. grandis respond differently to glyphosate drift. Tuffi- Santos et al (2009) worked with clones of E. grandis and found that although the factor clone has not influenced intoxication percentage and shoot dry matter accumulation, it significantly affected plant height when submitted to glyphosate.…”

supporting

confidence: 52%

Differential Tolerance of Clones of Eucalyptus grandis Exposed to Drift of the Herbicides Carfentrazone-Ethyl and Glyphosate

Santos

Alfenas

et al. 2019

Planta daninha

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Drift of the herbicides carfentrazone-ethyl and glyphosate may affect the initial growth of eucalyptus. This study aimed to assess the effect of carfentrazone-ethyl and glyphosate drift on photosynthesis, leaf morphoanatomy, and initial growth of two clones of Eucalyptus grandis. Two experiments were carried out in a 2 x 4 factorial scheme, in which factor 1 was represented by two clones of E. grandis and factor 2 by four herbicide underdoses (control, 86.4 g a.e. ha-1 of glyphosate, 3.0 g a.e. ha-1 of carfentrazone-ethyl, and the mixture of 86.4 g a.e. ha-1 of glyphosate + 3.0 g a.e. ha-1 of carfentrazone-ethyl). Herbicide application was carried out by simulating the drift in the lower third of seedling canopy. Assessments were performed 23 days after herbicide application. Both clones presented morphoanatomical changes such as erosion of epicuticular waxes and degeneration of epidermal and parenchymal cells, especially when exposed to carfentrazone-ethyl underdose or its mixture with glyphosate. The clone CLR 383 was the most affected by the tested herbicides and presented the highest injury, lowest initial growth, lowest dry matter, and highest reduction of photosynthetic rate when treated with herbicide mixture, followed by carfentrazone-ethyl and glyphosate underdoses. The initial growth, dry matter, and photosynthesis of the clone CLR 384 were not affected by the carfentrazone-ethyl underdose. Thus, both herbicides applied in isolation or in a mixture reduced the initial growth, dry matter, and photosynthesis of eucalyptus.

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supporting

confidence: 52%

Differential Tolerance of Clones of Eucalyptus grandis Exposed to Drift of the Herbicides Carfentrazone-Ethyl and Glyphosate

Santos

Alfenas

et al. 2019

Planta daninha

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“…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: 89%

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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“…Quando ocorreu a aplicação na parte superior observaram-se altos níveis de intoxicação no local da aplicação. Segundo Carvalho et al (2015), outras consequências pela exposição ao glyphosate são clorose e redução do crescimento de plantas, principalmente em tecidos metabolicamente ativos, tais como folhas imaturas, brotos, botões florais e raiz. Quando se avaliou a massa seca, os resultados obtidos apresentaram semelhança com a avaliação de intoxicação.…”

Section: Resultsunclassified

Absorção, translocação e efeitos metabólicos do glyphosate em plantas de eucalipto

Castro¹,

Carbonari²,

Velini³

et al. 2016

Sci. For.

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ResumoObjetivou-se avaliar a absorção e a translocação do glyphosate aplicado em diferentes posições em plantas de eucalipto (clone de Eucalyptus urograndis). Foram realizados dois experimentos em casa de vegetação em delineamento inteiramente casualizado, com quatro repetições. No primeiro experimento, adotou-se esquema fatorial 3 x 2, em que o fator A correspondeu ao local de aplicação na planta (aplicação na parte superior, inferior e a testemunha sem aplicação) e o fator B ao local da coleta na planta (parte superior e inferior). O segundo ensaio foi em esquema fatorial 2 x 2, em que o fator A correspondeu ao local de aplicação na planta com um galho protegido (galho protegido na parte superior e inferior) e o fator B ao local da coleta na planta (superior e inferior). As mudas foram plantadas em vasos contendo 5 litros de solo. Aos 50 dias após o plantio realizou-se a aplicação do glyphosate (360 g e.a. ha -1 ) em ambos os experimentos e a coleta aos 4 dias após a aplicação (DAA). O glyphosate, ácido aminometilfofônico (AMPA) e ácido chiquímico foram quantificados por cromatografia líquida e espectrometria de massas (LC-MS/MS). Aos 7, 14 e 21 DAA foi realizada a avaliação de intoxicação e a massa seca das plantas foi mensurada ao final do experimento. Não foram detectados níveis de AMPA nas folhas. A maior porcentagem de absorção observada foi na aplicação sobre a parte superior da planta. Os níveis de ácido chiquímico nas plantas aplicadas foram superiores aos encontrados na testemunha, indicando que houve intoxicação nas plantas. A aplicação de glyphosate na parte superior da planta causou maiores níveis de intoxicação e independentemente do local que recebeu a aplicação houve redução de massa seca das plantas de eucalipto. Portanto, conclui-se que o glyphosate após ser absorvido possui mobilidade em plantas de eucalipto, porém a não detecção do AMPA demonstra que o glyphosate não foi metabolizado na planta. Palavras-chave: ácido chiquímico, Eucalyptus urograndis, intoxicação. AbstractThe aim of this study was to evaluate the absorption and the translocation of glyphosate applied in different positions at eucalyptus plants (Eucalyptus urograndis clone). Two experiments were conducted in a greenhouse on a completely randomized design with four replications. In the first experiment, a 3 x 2 factorial arrangement was adopted, where the factor A corresponded to the application spot on the plant (application on top, bottom and control without application) and factor B to the collection spot on the plant (top and lower). The second test was 2 x 2 factorial, where factor A corresponded to the application spot on the plant with a protected branch (branch protected on top and bottom) and factor B to the collection spot on the plant (top and bottom) . The seedlings were planted in pots containing 5 liters of soil. 50 days after planting, glyphosate (360 g e.a. ha -1 ) was applied on both experiments and gathering occurred 4 days after application (DAA). Glyphosate, amino-methyl-phophonic acid (AMPA) and shikimic ac...

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Differential Response of Clones of Eucalypt to Glyphosate1

Cited by 13 publications

References 30 publications

Differential Tolerance of Clones of Eucalyptus grandis Exposed to Drift of the Herbicides Carfentrazone-Ethyl and Glyphosate

Differential Tolerance of Clones of Eucalyptus grandis Exposed to Drift of the Herbicides Carfentrazone-Ethyl and Glyphosate

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

Absorção, translocação e efeitos metabólicos do glyphosate em plantas de eucalipto

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