Fungicidas no controle da ferrugem asiática (Phakopsora pachyrhizi) e produtividade da soja

Soares, R. M.; Rubin, S. de A. L.; Wielewicki, Angélica Polenz; Ozelame, J. G.

doi:10.1590/s0103-84782004000400045

Cited by 34 publications

(28 citation statements)

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“…The yields of all treatments with fungicide application were higher than the Control (Table 4), confirming the results found by Soares (2004). The treatments had values ranging from 2826 kg ha -1 (treatment 2; pyraclostrobin at V6 and epoxiconazole + pyraclostrobin + mineral oil at R1, R5.1 and R5.4) to 3353 kg ha -1 (treatment 8; pyraclostrobin at V6, pyraclostrobin + fluxapyroxad + mineral oil at R1 and R5.1, pyraclostrobin + metconazole + mineral oil at R5.4), while the Control had 2568 kg ha -1 (Table 4).…”

Section: Resultssupporting

confidence: 87%

“…& P. Syd. This pathogen is commonly found in the main producing areas of soybean and, if not controlled, may cause yield losses, which are estimated in approximately 80% under optimal conditions for the fungus development, due to the rapid yellowing and premature defoliation, which hinder the formation of pods and beans (SOARES et al, 2004;YORINORI et al, 2005). Initial symptoms of soybean rust consist of small leaf spots of brown to dark brown color (PINTO, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Fluxapyroxad in the Asian Soybean Rust Control in the Cerrado Biome

et al. 2016

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-The etiologic agent of the Asian soybean rust is the Phakopsora pachyrhizi, which causes a reduction in the photosynthetic leaf area and, consequently, in the crop yield. Chemical control is one of the main measures for its management. The objective of this work was to evaluate the efficacy and selectivity of the fluxapyroxad fungicide on controlling the Asian soybean rust, under the edaphoclimatic conditions of the Cerrado biome. The experiment was conducted in an area under no-tillage system, in the Agricultural Research Center, Rio Verde, Goias, Brazil, during the 2012/2013 crop season, using the cultivar NA7337. A randomized block experimental design was used, with twelve treatments and four replications. The treatments consisted of applications of fluxapyroxad (FX), pyraclostrobin (PT), epoxiconazole (EX) and metconazole (MZ). The average severity of the disease in the plants reached 37% in the Control. All treatments with fungicides differed from the Control. Treatments 9, 10, 11 and 12 provided the greatest rates of soybean rust control. The treatments 10, 11 and 12 had the highest thousand grain weights, and the yields of the treatments 2, 3 and 11, despite higher than the Control, were lower than the treatments 4, 5, 6, 7, 8, 9, 10 and 12, which had statistically equal yields. The increasing in yield, compared to the Control, ranged from 10.05% (pyraclostrobin, epoxiconazole + pyraclostrobin + mineral oil) to 30.55% (pyraclostrobin, pyraclostrobin + fluxapyroxad + mineral oil and pyraclostrobin + metconazole + mineral oil). The highest rates of soybean rust control were presented by fungicides containing fluxapyroxad.Keywords: Glycine max. Phakopsora pachyrhizi. Chemical control. Carboxamide. FLUXAPIROXADE NO CONTROLE DA FERRUGEM ASIÁTICA DA SOJA EM CONDIÇÕES DE CERRADORESUMO -A ferrugem asiática da soja, cujo agente etiológico é o fungo Phakopsora pachyrhizi, causa redução da área foliar fotossintética e diminui a produtividade da cultura, sendo o controle químico uma das principais medidas no seu manejo. O objetivo do trabalho foi avaliar a eficácia e a seletividade do fungicida fluxapiroxade no controle da ferrugem asiática na cultura da soja, em condições edafoclimáticas do Cerrado. O experimento foi conduzido em área sob sistema de plantio direto, no Centro de Pesquisa Agrícola, Rio Verde, Goiás, durante a safra 2012/2013, utilizando a cultivar NA 7337. O delineamento experimental utilizado foi blocos ao acaso, com doze tratamentos e quatro repetições. Os tratamentos consistiram de aplicação de fluxapiroxade (FX), piraclostrobina (PT), epoxiconazol (EX) e metconazol (MZ). A severidade média da doença nas plantas chegou a 37% na testemunha. Todos os tratamentos contendo fungicidas diferiram da testemunha. Os tratamentos 9, 10, 11 e 12 foram os que proporcionaram maiores níveis de controle da ferrugem asiática, os tratamentos 10, 11 e 12 alcançaram maiores massa de mil grãos e os tratamentos 2, 3 e 11 foram mais produtivos que a testemunha, porém inferiores aos 4, 5, 6, 7, 8, 9, 10 e 12, se...

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Fluxapyroxad in the Asian Soybean Rust Control in the Cerrado Biome

et al. 2016

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“…O tratamento com pyraclostrobin + epoxiconazole em R 1 + R 5 (13,3 g) diferiu estatisticamente da testemunha (11,7 g) com acréscimos de 13%, Tabela 2. Soares et al (2004) também relataram incrementos de 12% no peso de cem sementes com a utilização do mesmo fungicida.…”

Section: Resultsunclassified

Efeito de fungicidas sistêmico e protetores aplicados em diferentes estádios fenológicos no controle da ferrugem asiática da soja

Júnior¹,

Rezende

Carvalho

et al. 2009

Ciênc. agrotec.

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RESUMOObjetivou-se, neste trabalho, verificar o efeito dos fungicidas oxicloreto de cobre, tiofanato metílico, tiofanato metílico + clorotalonil e clorotalonil em diferentes estádios fenológicos V 6 , R 1 , R 5 , V 6 + R 1 , V 6 + R 5 e R 1 + R 5 no controle da ferrugem asiática da soja. O estudo foi conduzido na área experimental do Departamento de Agricultura da Universidade Federal de Lavras. Observou-se efeito significativo de controle da ferrugem asiática para todos os fungicidas avaliados. A aplicação de pyraclostrobin + epoxiconazole em R 1 proporcionou o controle efetivo da doença, não diferindo estatisticamente de V 6 + R 1 e R 1 + R 5 . As aplicações em R 5 e V 6 + R 5 apresentaram elevada severidade, no entanto, com rendimento de grãos semelhante a aplicações do mesmo fungicida nos estádios R 1 , V 6 + R 1 e R 1 + R 5 .Termos para indexação: Freqüência de pulverizações, Phakopsora pachyrhizi, Glycine max. ABSTRACTThe aim of this work was to verify the effect of the fungicides dicopper chloride trihydroxide, thiophanate methyl, chlorothalonil+thiophanate methyl, chlorothalonil, and pyraclostrobin+epoxiconazole applied at the stages V 6 , R 1 , R 5 , V 6 +R 1 , V 6 +R 5 , R 1 +R 5 on the control of the Asian rust and on the agronomic characteristics of the soybean. The experiment was carried out at the experimental area of the Agriculture Department, Federal University of Lavras, Lavras -MG, Brazil. Significant effects were observed for all fungicides on Asian rust control, in comparison with the control. The treatments with fungicide sprays pyraclostrobin + epoxiconazole at the growth stage R 1 provided the effective control of the disease, no significant differences were observed between V 6 + R 1 and R 1 + R 5 . The sprays at R 5 and V 6 + R 5 showed high disease severity however, with grain yield similar to the applications of the same fungicide at the stages R 1 , V 6 + R 1 and R 1 + R 5 .

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“…is currently the main biotic limitation of soybean (Glycine max (L.) Merril] worldwide, being responsible for up to 90 % of losses caused (Yorinori et al, 2005) mainly due to early defoliation. Leaf reduction prevents complete seed formation with subsequent productivity reduction (Soares Rubin, Wielewicki & Ozelame, 2004). Moreover, when the disease presence is high, there are also a high number of uredia per unit area, therefore, greater interference on leaf metabolism and higher water loss; this in turn is reflected on leaflet durability (Garcés-Fiallos & Forcelini, 2011b).…”

Section: Introductionmentioning

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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Fungicidas no controle da ferrugem asiática (Phakopsora pachyrhizi) e produtividade da soja

Abstract: Fungicides on the control of soybean rust (Phakopsora pachyrhizi) and soybean yield RESUMO Neste trabalho, avaliou-se o efeito de fungicidas no desenvolvimento da ferrugem asiática, causada pelo fungo

Cited by 34 publications

References 1 publication

Fluxapyroxad in the Asian Soybean Rust Control in the Cerrado Biome

Fluxapyroxad in the Asian Soybean Rust Control in the Cerrado Biome

Efeito de fungicidas sistêmico e protetores aplicados em diferentes estádios fenológicos no controle da ferrugem asiática da soja

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

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