Adjuvantes na deriva de 2,4-D + glyphosate em condições de campo

Costa, A. N.; Velini, Edivaldo Domingues; Rossi, Caio Vitagliano Santi; Corrêa, Marcelo Rocha; Negrisoli, E.; Fiorini, Marcus Vinicius; Siono, Luis Marcelo

doi:10.1590/s0103-84782014000300001

Cited by 9 publications

(9 citation statements)

References 17 publications

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“…. Costa et al (2014) also did not verify effects of adjuvants on glyphosate + 2,4-D spray drift collected at 5 and 10 m in field applications using a 11 m boom sprayer. Gandolfo et al (2012) evaluated the drift from glyphosate and 2,4-D applications in a wind tunnel, using 100 L ha -1 carrier volume and AXI 110015 non-air induction flat-fan nozzles.…”

mentioning

confidence: 92%

“…With recent development of new glyphosate and 2,4-D-resistant crops, their use will increase in the next few years (ROBINSON; SIMPSON; JOHNSON, 2012), as well as concerns about environmental contamination. Specifically for 2,4-D, it must be managed correctly to mitigate spray drift, e.g., do not spray it close to sensitive areas and under inadequate wind speed conditions (GANDOLFO et al, 2012;COSTA et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Spray drift and efficacy from glyphosate and 2,4-D applications with adjuvants

Alves¹,

Cunha

Landim

et al. 2020

Biosci. J.

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Weed plants are one of main factors that affect the production of oilseed crops. Their management have been based on chemical control with herbicides, like glyphosate and 2,4-D, due to usefulness and efficiency of applications. However, their use must be managed correctly to mitigate the spray drift. Therefore, this study aimed to evaluate efficacy and spray drift from glyphosate and 2,4-D applications with adjuvants. The drift evaluation of herbicide solutions was conducted in a split-plot arranged in a randomized block design with five replications. Main plots consisted of three herbicide solutions at 150 L ha-1 (glyphosate + 2,4-D, glyphosate + 2,4-D + sodium lauryl ether sulphate, and glyphosate + 2,4-D + fatty acid esters). Sub-plots consisted of five downwind distances (1 to 10 m) from the sprayed area. It was used a fluorecent tracer and drift colectors. The efficacy trial was performed in a randomized block design with four replications in a 3 x 2 factorial scheme, being the same herbicide solutions and two carrier volumes (75 and 150 L ha-1). Droplet spectrum and weed depositon were evaluated and physicochemical properties of the herbicide solutions were characterized. Glyphosate + 2,4-D with or without adjuvants, sprayed using 75 or 150 L ha-1, resulted in similar deposition of tracer on weeds and their control. Those herbicides associated or not with sodium lauryl ether sulphate and fatty acid esters produce similar droplet spectrum and deposition of tracer on drift collectors.

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mentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Spray drift and efficacy from glyphosate and 2,4-D applications with adjuvants

Alves¹,

Cunha

Landim

et al. 2020

Biosci. J.

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“…The herbicide 2.4-D caused high toxicity to sensitive crops with intensive use, particularly in no-tillage system in Brazil (Costa et al, 2014). With the mixture glyphosate + 2.4-D, increased phytotoxicity was observed at higher dosages ( Figure 1C).…”

Section: Introductionmentioning

confidence: 99%

Initial growth of tree species under herbicide drift

Monquero¹,

Bevilaqua²,

Silva³

et al. 2016

RCA

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ABSTRACT:The present study aimed to evaluate the effect of different doses of the herbicides picloram, glyphosate, glyphosate + 2.4-D, and 2.4-D on the survival and growth of the tree species Croton floribundus and Heliocarpus americanus and Myrsine coriacea. The experimental design was completely randomized with four replicates. The tree species were sprayed with 0; 2.5; 5; 10; 20; 40; 60; 75; 90 and 100% of the commercial dose of each herbicide. The percentage of phytotoxicity, chlorophyll content, height, stem diameter, leaf area and aerial dry biomass of the species were evaluated. For H. americanus, the herbicides glyphosate, 2.4-D and glyphosate + 2.4-D were phytotoxic. Among the evaluated herbicides, picloram was the most phytotoxic for all species. Glyphosate presented lower phytotoxicity at lower doses for M. coriacea compared with C. floribundus and H. americanus. A negative impact of 2.4-D was verified in all species, even at the lowest doses. The mixture glyphosate + 2.4-D also presented high phytotoxicity, with lower values for the species M. coriacea. The results showed that the application of these herbicides should be directed and protected, and even low dosages have deleterious effects on these species. 0; 2,5; 5; 10; 20; 40; 60; 75; 90 RESUMO: O objetivo deste trabalho foi avaliar o efeito de diferentes doses dos herbicidas picloram, glyphosate, glyphosate + 2,4-D e 2,4-D na sobrevivência e no crescimento das espécies arbóreas Croton floribundus, Heliocarpus americanus e Myrsine coriacea. O delineamento experimental foi inteiramente casualizado, com quatro repetições. As espécies arbóreas foram pulverizadas com

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“…Adjuvants are substances added to spray solutions and directly or indirectly may improve spraying applications, increase the efficiency of pesticides and reduce application risks, and decrease the impact of pesticides on the environment and operators (Costa et al, 2014;Madureira et al, 2015). Adjuvants are divided into two groups: activating adjuvants (mineral oil, vegetable oil, and nitrogen fertilizers), which directly improve crop protection by allowing higher product absorption by the plant cuticle; modifiers of the surface tension of liquids (adherents, dispersants, surfactants, and spreaders).…”

Section: Introductionmentioning

confidence: 99%

Interactions Between Adjuvants and the Fungicide Azoxystrobin+benzovindiflupyr in Hydraulic Spraying

et al. 2019

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Adjuvants are tools to maximize pesticide spray quality. This study aimed to evaluate the interaction effects between adjuvants and the fungicide azoxystrobin + benzovindiflupyr on the physicochemical characteristics, droplet evaporation time, and spray droplet size. The experiment was carried out using a 26 factorial scheme, in which the first factor was the absence or presence of the fungicide mixture (water or water + fungicide) and the second factor was the presence of different adjuvants (water and five adjuvants). The parameters evaluated were surface tension, pH, viscosity, electrical conductivity, droplet evaporation time, volume median diameter, percentage of droplets smaller than 100 µm, and relative amplitude of the droplet spectrum. The silicone and propionic acid + soy lecithin adjuvants reduced the pH of the spray solution, and the sodium lauryl ether sulfate, propionic acid + soy lecithin, and orange essential oil adjuvants reduced droplet evaporation when mixed with the fungicide. All tested adjuvants improved spray quality related to the characteristics of the droplet spectrum, reducing the percentage of droplets smaller than 100 μm, and allowing more uniform droplet size. The fungicide azoxystrobin + benzovindiflupyr affected droplet evaporation time.

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Adjuvantes na deriva de 2,4-D + glyphosate em condições de campo

Cited by 9 publications

References 17 publications

Spray drift and efficacy from glyphosate and 2,4-D applications with adjuvants

Spray drift and efficacy from glyphosate and 2,4-D applications with adjuvants

Initial growth of tree species under herbicide drift

Interactions Between Adjuvants and the Fungicide Azoxystrobin+benzovindiflupyr in Hydraulic Spraying

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