Espectro de gotas e idade de trifólios na taxa de absorção e efeito residual de fungicidas em soja

Lenz, Giuvan; Balardin, Ricardo Silveiro; Minuzzi, Simone Gripa; Tormen, Nédio Rodrigo; Marques, Leandro Nascimento

doi:10.1590/s0103-84782011005000127

Cited by 12 publications

(14 citation statements)

References 5 publications

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“…Since the motion of most fungicides is acropetal (SWOBODA & PEDERSEN, 2009;ANTUNIASSI et al, 2011 andLENZ et al 2011), spraying the base of plants suggests significantly a more effective control of the diseases when compared to sprayings by tips distant from the apex of soybean plants. However, experimental results indicate that the aggregation of such technology in aerial spraying of fungicide from soybean -isolated or in combination with conventional sprayings -did not differ significantly from the spraying by nozzles on the culture; thus refuting the assumptions that justify the use of such technology application.…”

Section: Resultsmentioning

confidence: 99%

“…Likewise, it is here that the coverage and penetration of the fungicide are more adversely affected by the leaf weight of tops to form a barrier spraying, favoring the pathogen (ALMEIDA et al 2,005;CALLA et al 2,009;REIS et al, 2010;CUNHA et al, 2011). Like most systemic fungicides suitable for chemical control of soybean foliar diseases move in the direction of the base to the apex of the plant, the leaves of the lower third of the plant become the target of spraying (SWOBODA & PEDERSEN, 2009;ANTUNIASSI et al, 2011;LENZ et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Fungicide application using a trailing boom in soybean fields

Neto

Fornari²,

Bauer

et al. 2013

Eng. Agríc.

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ABSTRACT:The objective of this study was to determine the effects in the yield of soybean crop utilizing a trailing boom sprayer for chemical control of late season diseases. The experimental design was randomized blocks with 04 treatments, which consisted of applying fungicides with a traditional sprayer, trailing boom, the traditional sprayer plus the trailing boom simultaneously and control (without fungicide aerial application) in 05 repetitions per treatment. The variables evaluated were: final plant population, pods per plant, grains per pod, weight of one thousand grains and yield. It was concluded that the control of foliar diseases with fungicides presented weight of one thousand grains and yield significantly higher than the average of plots without fungicide application. The trailing boom did not significantly affect the yield compared to the technology currently used.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fungicide application using a trailing boom in soybean fields

Neto

Fornari²,

Bauer

et al. 2013

Eng. Agríc.

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show abstract

“…Thus, the uniform coverage assumes a satisfactory distribution of pulverized or sprayed liquid characterized by low coefficients of variation of surface volumetric distribution regarding tip sets (Cunha & Silva, 2010). Tips or nozzles with higher density provide greater leaf area coverage and subsequently, efficient absorption (Lenz et al, 2011). However, our results showed that for example, tips such as XR 11001 that generate higher droplet density did not efficiently control the Asian soybean rust disease.…”

Section: Resultsmentioning

confidence: 59%

“…In this regard, fine droplet spectrum provides an efficient deposition, control of the Asian soybean rust, and productivity, regardless of the soybean cultivar assessed (Debortoli et al, 2012). Such droplets have a higher fungicide absorption rate (Lenz, Balardin, Minuzzi, Tormen & Marques, 2011), and higher penetration on soybean plant canopy (Román, Cortez, Ferreira & Oliveira, 2009). According to Debortoli et al, (2012), a fine droplet spectrum (<200 μm) gives efficient results in terms of droplet deposition.…”

Section: Resultsmentioning

confidence: 99%

Droplet spectrum and fungicide efficiency in the control of Asian soybean rust (Phakopsora pachyrhizi Syd. & P. Syd.)

et al. 2018

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El objetivo de este estudio fue evaluar el control químico de la roya asiática de la soya (Phakopsora pachyrhizi Syd. Y P. Syd.) Utilizando diferentes puntas y boquillas en condiciones controladas.La trifolia enraizada colocada dentro de una caja acrílica que contiene macronutrientes, micronutrientes y vitaminas se trataron con los siguientes fungicidas: epoxiconazol + piraclostrobina, ciproconazol + azoxistrobina y tebuconazol. Estos fungicidas se pulverizaron a una altura de 0.5 m con dos pulverizadores de mochila presurizados con gas CO2 (generador de caída en cuatro puntas de pulverización espaciados 0.5 m uno del otro) y otra boquilla giratoria (generador de caída a través de una boquilla giratoria). La trifolia no tratada eran controles. Se colocó papel sensible al agua junto a cada caja de acrílico para obtener el diámetro medio del volumen (MVD), el número de gotas.cm-2 y la cobertura (%). Trifolia se inocularon 24 horas después de que estos se trataron con fungicida, usando una concentración de esporas ajustada a 2 x 104 uredosporas.mL-1. Luego, se cuantificó el número de lesiones y uredia.cm-2 en las valvas centrales. Se observó un menor número de lesiones y uredia.cm-2 en folíolos tratados con dos mezclas de fungicidas usando una punta AIRMIX 11001. Se encontró una menor VMD en foliolos pulverizados con los fungicidas azoxystrobin + epoxiconazol y tebuconazol, en comparación con los folíolos tratados con otra mezcla. El control de la roya asiática, así como el número de gotas.cm-2 y la cobertura, parece depender de las interacciones entre los fungicidas y las puntas o boquillas.

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“…Inoculation was based on the methodology used by Lenz et al (2011). Urediniospores of P. pachyrhizi were at the concentration of 2 x10 5 spores ml -1 of distilled water plus Tween adhesive spreader (80 ppm).…”

Section: Application Of Treatment and Pathogen Inoculationmentioning

confidence: 99%

Effect of the interaction between fungicide application time and rainfall simulation interval on Asian Soybean Rust control effectiveness

Stefanello

Balardin

Minuzzi

et al. 2016

SCA

Self Cite

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Environmental factors affect the performance of fungicides in soybean (Glycine max (L.) Merr.). They also influence the residual activity of the products applied to the leaves. The objective of this study was to assess the control effectiveness of the interaction between fungicide application and rainfall simulation on Asian Soybean Rust (ASR). Two experiments were conducted, one in the greenhouse, in a completely randomized design, and the other in the field, in a randomized block design. Both the experiments had the same factorial arrangement of 6x5, with four replications. Factor A: Five fungicide applications time at 0400 h, 0900 h, 1400 h, 1800 h, 2300 h and, a control with no application; Factor B: four intervals of time between the application of fungicide and rainfall simulation at 0, 30, 60 and 120 min for the experiment in the greenhouse and at 2, 30, 60, 120 min for the experiment in the field. A control was included for both the experiments with no rainfall. The number of days to the appearance of the first pustules was determined, along with severity of ASR, relative chlorophyll index and productivity. It was found that the ASR control effectiveness of fungicide applications in soybean plants in sunlight was less efficient with rainfall simulation. The rainfall simulation had greater negative effect on disease control effectiveness in applications conducted at night under dew conditions. The application conducted at 0900 h showed the greatest disease control effectiveness in both greenhouse and in the field conditions. The 1400 h application showed decreased fungicide control residual and ASR control effectiveness, possibly due to a combination of the low relative humidity and high temperature. Rainfall simulation carried out at 120 min after application still had the ability to affect the ASR control effectiveness. Key words: Chemical control. Dew. Glycine max L. Night application. Phakopsora pachyrhizi. ResumoOs fatores ambientais afetam o comportamento dos fungicidas em soja (Glycine max (L.) Merr.). Eles também influenciam a atividade residual de produtos aplicados na folha. O objetivo do estudo

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Espectro de gotas e idade de trifólios na taxa de absorção e efeito residual de fungicidas em soja

Cited by 12 publications

References 5 publications

Fungicide application using a trailing boom in soybean fields

Fungicide application using a trailing boom in soybean fields

Droplet spectrum and fungicide efficiency in the control of Asian soybean rust (Phakopsora pachyrhizi Syd. & P. Syd.)

Effect of the interaction between fungicide application time and rainfall simulation interval on Asian Soybean Rust control effectiveness

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