influência do orvalho e volume de calda de aplicação na eficácia do glyphosate na dessecação de brachiaria plantaginea influence of dew and spray volume on the efficacy of glyphosate for brachiaria plantaginea burndown

Clicks: 336
ID: 136939
2004
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Abstract
A eficácia de herbicidas é influenciada por diversos fatores que afetam a absorção e a translocação desses compostos na planta. A absorção de herbicidas pelas plantas, por exemplo, é influenciada, tanto física como biologicamente, pela temperatura e pela umidade relativa do ar dentro do dossel. Com a diminuição da umidade relativa do ar e/ou com o aumento da temperatura, as gotas da pulverização secam mais rapidamente e a absorção do produto diminui, ou até mesmo cessa, afetando o desempenho biológico. Com base nessa premissa, o presente estudo teve como objetivo examinar a influência do orvalho e do volume de calda de aplicação na eficiência de doses de glyphosate para o controle de Brachiaria plantaginea. Foram observadas interações significativas entre volume de calda, orvalho e dose de glyphosate. O volume mais baixo (100 L ha-1) resultou em melhor controle da espécie, especialmente quando o herbicida foi usado na menor dose (90 g ha-1). A presença de orvalho nas folhas causou reduções na atividade do produto, especialmente quando aplicado na menor dose e combinado com maior volume de calda.
The efficacy of herbicides is influenced by several factors affecting the absorption and translocation of these compounds in the plant. Herbicide plant absorption, for example, is both physically and biologically influenced by temperature and air relative humidity in the plant canopy. With the reduction in relative air humidity and/or increase in temperature, the spray droplets dry more rapidly and the absorption of the herbicide decreases or even stops, affecting the biological performance. Based on that, this research aimed to study the influence of dew and spray volume on the efficacy of glyphosate rates in the control of B. plantaginea. There were significant interactions among volume of water, dew and rate of glyphosate. The lower the water volume, the more effective the glyphosate activity was, especially when applied at the lowest tested rate (90 g ha-1). The presence of dew on the leaves caused reductions in the activity of the product, mainly when the lowest rate was combined with the highest water volume.
Reference Key
roman2004plantainfluncia Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;E.S. Roman;L. Vargas;M.C.F. Ribeiro;A.R.M. Luiz
Journal anti-cancer agents in medicinal chemistry
Year 2004
DOI
10.1590/S0100-83582004000300019
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582004000300019
Keywords
absorption herbicides

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