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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
10/04/2008 |
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Data da última atualização: |
11/04/2008 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SCHERM, H.; CHRISTIANO, R. S. C.; DEL PONTE, E. M.; ESKER, P. D.; GODOY, C. V. |
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Afiliação: |
Harald Scherm University of Georgia Athens GA; Rock S. C. Christiano University of Georgia Athens GA; Emerson M. Del Ponte, Universidade Federal do Rio Grande do Sul; Paul D. Esker University of Wisconsin Madison WI; Claudia Vieira Godoy, CNPSo. |
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Título: |
Meta-analysis of fungicide efficacy trials against Asian soybean rust in Brazil. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: NATIONAL SOYBEAN RUST SYMPOSIUM. 2007, Louisville. Proceedings. 1p. Disponível em: . Acesso em: 10 abr. 2008. |
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Idioma: |
Inglês |
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Conteúdo: |
With the arrival of Asian soybean rust in the Western Hemisphere in 2001, field research to optimize chemical control of this important yield-limiting disease has proliferated. We present a meta-analytical synthesis of the results of 66 fungicide efficacy trials containing >800 entries (specific fungicidal treatments) conducted in Brazil from 2001/2002 to 2006/2007. Weighted median response ratios for disease severity (RS) and yield (RY) were 0.141 and 1.40, respectively, indicating that, on average, fungicide treatments reduced disease by 85.9% (range: ?38.9 to 100%) and increased yield by 40.0% (range: ?28.8 to 435%). Response ratios were dependent on disease pressure (expressed as disease severity of the untreated control), being worst under low disease pressure and best under medium (RS) or high (RY) disease pressure. Rank correlation analysis revealed a highly significant inverse relationship between RY and RS for low and high (but not medium) disease pressure. Based on a comparison of the empirical distribution functions between entries with one versus two seasonal fungicide applications, two applications significantly improved RS under low and medium disease pressure and RY for all three disease pressure classes. For trials that included multiple fungicide classes, pairwise differences in RS values between fungicide classes were calculated for each trial, and the median differences across trials were tested for deviation from zero. Based on this analysis, DMI fungicides performed significantly better than QoI fungicides. RS values of DMIs improved significantly in mixture with QoIs but not with benzimidazoles. Differences in performance among specific active ingredients will be discussed. MenosWith the arrival of Asian soybean rust in the Western Hemisphere in 2001, field research to optimize chemical control of this important yield-limiting disease has proliferated. We present a meta-analytical synthesis of the results of 66 fungicide efficacy trials containing >800 entries (specific fungicidal treatments) conducted in Brazil from 2001/2002 to 2006/2007. Weighted median response ratios for disease severity (RS) and yield (RY) were 0.141 and 1.40, respectively, indicating that, on average, fungicide treatments reduced disease by 85.9% (range: ?38.9 to 100%) and increased yield by 40.0% (range: ?28.8 to 435%). Response ratios were dependent on disease pressure (expressed as disease severity of the untreated control), being worst under low disease pressure and best under medium (RS) or high (RY) disease pressure. Rank correlation analysis revealed a highly significant inverse relationship between RY and RS for low and high (but not medium) disease pressure. Based on a comparison of the empirical distribution functions between entries with one versus two seasonal fungicide applications, two applications significantly improved RS under low and medium disease pressure and RY for all three disease pressure classes. For trials that included multiple fungicide classes, pairwise differences in RS values between fungicide classes were calculated for each trial, and the median differences across trials were tested for deviation from zero. Based on this analysis, DMI fungicid... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02361naa a2200169 a 4500
001 1470850
005 2008-04-11
008 2007 bl --- 0-- u #d
100 1 $aSCHERM, H.
245 $aMeta-analysis of fungicide efficacy trials against Asian soybean rust in Brazil.
260 $c2007
520 $aWith the arrival of Asian soybean rust in the Western Hemisphere in 2001, field research to optimize chemical control of this important yield-limiting disease has proliferated. We present a meta-analytical synthesis of the results of 66 fungicide efficacy trials containing >800 entries (specific fungicidal treatments) conducted in Brazil from 2001/2002 to 2006/2007. Weighted median response ratios for disease severity (RS) and yield (RY) were 0.141 and 1.40, respectively, indicating that, on average, fungicide treatments reduced disease by 85.9% (range: ?38.9 to 100%) and increased yield by 40.0% (range: ?28.8 to 435%). Response ratios were dependent on disease pressure (expressed as disease severity of the untreated control), being worst under low disease pressure and best under medium (RS) or high (RY) disease pressure. Rank correlation analysis revealed a highly significant inverse relationship between RY and RS for low and high (but not medium) disease pressure. Based on a comparison of the empirical distribution functions between entries with one versus two seasonal fungicide applications, two applications significantly improved RS under low and medium disease pressure and RY for all three disease pressure classes. For trials that included multiple fungicide classes, pairwise differences in RS values between fungicide classes were calculated for each trial, and the median differences across trials were tested for deviation from zero. Based on this analysis, DMI fungicides performed significantly better than QoI fungicides. RS values of DMIs improved significantly in mixture with QoIs but not with benzimidazoles. Differences in performance among specific active ingredients will be discussed.
700 1 $aCHRISTIANO, R. S. C.
700 1 $aDEL PONTE, E. M.
700 1 $aESKER, P. D.
700 1 $aGODOY, C. V.
773 $tIn: NATIONAL SOYBEAN RUST SYMPOSIUM. 2007, Louisville. Proceedings. 1p. Disponível em: <http://www.plantmanagementnetwork.org/infocenter/topic/soybeanrust/2007/posters/03.asp>. Acesso em: 10 abr. 2008.
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Registro original: |
Embrapa Soja (CNPSO) |
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| 24. |  | NICOLLI, C. P.; SPOLTI, P.; TIBOLA, C. S.; FERNANDES, J. M. C.; DEL PONTE, E. M. Fusarium head blight and trichothecene production in wheat by Fusarium graminearum and F. meridionale applied alone or in mixture at post-flowering. Tropical Plant Pathology, Brasília, DF, v. 40, N. 2, p. 134-140, 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
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| 32. | | DEL PONTE, E. M.; GODOY, C. V.; CANTERI, M. G.; REIS, E. M.; YANG, X. B. Models and applications for risk assessment and prediction of Asian soybean rust epidemics. Fitopatologia Brasileira, Brasília, DF, v.31, n. 6, p. 533-544, Nov./Dec. 2006.| Biblioteca(s): Embrapa Soja. |
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