Spray nozzles, working pressures and use of adjuvant in reduction of 2,4-D herbicide spray drift

Godinho, João de Deus; Vieira, Lucieth Cruz; Ruas, Renato Adriane Alves; Filho, Alberto Carvalho; Faria, Vinícius Ribeiro; God, Pedro Ivo Vieira Good

doi:10.1590/s0100-83582020380100070

Cited by 5 publications

(1 citation statement)

References 15 publications

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“…The amount of dye deposited on the plants was quantified using a spectrophotometer (Biospectrum, model SP 220) at a wavelength of 630 nm (Prado et al, 2015;Nairn & Forster, 2019;Godinho Jr., 2020). A linear equation was established ([dye] = 7.235 × Abs + 0.0263; R² = 0.99) using the previously known dye concentrations of 15, 7.5, 3.75, 1.875, 0.9375, 0.4688 and 0.2343 mg L -1 , which allowed for the transformation of the absorbance values into dye concentrations (in mg L -1 ).…”

Section: Quantification Of Spray Depositionmentioning

confidence: 99%

Influence of Droplet Size on Spray Deposition and Weed Control Using Glyphosate

et al. 2021

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Droplet size is one of the most important factors that affect spray deposition and weed control through the use of herbicides. The aim of this study was to evaluate the influence of the droplet size on the spray deposition and control of Euphorbia heterophylla and Urochloa ruziziensis by using glyphosate. The treatments included spraying glyphosate with fine, medium, coarse, very coarse, and ultra-coarse droplet sizes to determine the deposition, uniformity of distribution, visual control, and dry weight reduction (DWR). The treatments were compared with the values of the dose required to achieve 50% DWR or 50% visual control (C50) at 7, 14, 21, and 28 days after herbicide application. Fine and medium droplet sizes afforded high deposition values and low distribution uniformities in E. heterophylla. Fine and medium droplet sizes yielded the lowest C50 on visual control and DWR in E. heterophylla, respectively. The droplet size did not affect the spray deposition on U. ruziziensis plants; however, the larger droplets had less uniformity of distribution. In U. ruziziensis plants, spraying glyphosate with coarse and medium droplet sizes yielded the lowest values of C50 to visual control and DWR, respectively.

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Section: Quantification Of Spray Depositionmentioning

confidence: 99%