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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
28/02/2008 |
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Data da última atualização: |
05/03/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALLORENT, D.; WILLOCQUET, L.; SARTORATO, A.; SAVARY, S. |
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Afiliação: |
DELPHINE ALLORENT, IRD-CBGP; LAETITIA WILLOCQUET, INRA; ALOISIO SARTORATO, CNPAF; SERGE SAVARY, INRA. |
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Título: |
Quantifying and modelling the mobilisation of inoculum from diseased leaves and infected defoliated tissues in epidemics of angular leaf spot of bean. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
European Journal of Plant Pathology, v. 113, n. 4, p. 377-394, Dec. 2005. |
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Idioma: |
Inglês |
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Conteúdo: |
Daily multiplication factor (number of daughter lesions per mother lesion per day) values were experimentally measured in four replications of a monocyclic experiment on angular leaf spot (ALS) of bean, where sources of inoculum were artificially established within a bean canopy, on the ground (defoliated infected leaves), or both. Daily multiplication factor of lesions in the canopy (DMFRc) was higher than that of infectious, defoliated tissues (DMFRd) in all replications. Both DMFRc and DMFRd were strongly reduced under dry compared to rainy conditions. Under rainy conditions for spore dispersal DMFRd was about two to three times smaller than DMFRc. Defoliated leaves may nevertheless represent a significant source of infection, depending on the amount of infectious tissues. Mother lesions within the canopy generated more daughter lesions in the medium (or lower) layers of the canopy than at its upper level (DMFRc higher at the medium and lower layers of a canopy), whereas DMFRd values seemed to decrease with height in the canopy. A mechanistic simulation model that combines host growth and disease-induced defoliation was designed to simulate the respective contributions of the two components of the dual inoculum source of a diseased canopy (infected foliage and defoliated infectious tissues), and varying infectious periods in both sources. Simulations suggest that higher DMFRc values have a large polycyclic effect on epidemics whereas that of DMFRd is small, and that large effects of the infectious period of lesions in the canopy are found when DMFRc is high. Simulations using experimentally measured DMFRc and DMFRd values indicated much stronger epidemics in rainy compared to dry conditions for spore dispersal, but disease persistence in the latter. The implications of considering a dual source of inoculum in the course of a polycyclic process are discussed with respect to epidemic thresholds. MenosDaily multiplication factor (number of daughter lesions per mother lesion per day) values were experimentally measured in four replications of a monocyclic experiment on angular leaf spot (ALS) of bean, where sources of inoculum were artificially established within a bean canopy, on the ground (defoliated infected leaves), or both. Daily multiplication factor of lesions in the canopy (DMFRc) was higher than that of infectious, defoliated tissues (DMFRd) in all replications. Both DMFRc and DMFRd were strongly reduced under dry compared to rainy conditions. Under rainy conditions for spore dispersal DMFRd was about two to three times smaller than DMFRc. Defoliated leaves may nevertheless represent a significant source of infection, depending on the amount of infectious tissues. Mother lesions within the canopy generated more daughter lesions in the medium (or lower) layers of the canopy than at its upper level (DMFRc higher at the medium and lower layers of a canopy), whereas DMFRd values seemed to decrease with height in the canopy. A mechanistic simulation model that combines host growth and disease-induced defoliation was designed to simulate the respective contributions of the two components of the dual inoculum source of a diseased canopy (infected foliage and defoliated infectious tissues), and varying infectious periods in both sources. Simulations suggest that higher DMFRc values have a large polycyclic effect on epidemics whereas that of DMFRd is small, and that large... Mostrar Tudo |
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Thesagro: |
Doença de Planta; Feijão; Mancha Angular; Phaseolus Vulgaris. |
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Thesaurus Nal: |
Phaeoisariopsis griseola. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02628naa a2200217 a 4500
001 1216419
005 2024-03-05
008 2005 bl uuuu u00u1 u #d
100 1 $aALLORENT, D.
245 $aQuantifying and modelling the mobilisation of inoculum from diseased leaves and infected defoliated tissues in epidemics of angular leaf spot of bean.
260 $c2005
520 $aDaily multiplication factor (number of daughter lesions per mother lesion per day) values were experimentally measured in four replications of a monocyclic experiment on angular leaf spot (ALS) of bean, where sources of inoculum were artificially established within a bean canopy, on the ground (defoliated infected leaves), or both. Daily multiplication factor of lesions in the canopy (DMFRc) was higher than that of infectious, defoliated tissues (DMFRd) in all replications. Both DMFRc and DMFRd were strongly reduced under dry compared to rainy conditions. Under rainy conditions for spore dispersal DMFRd was about two to three times smaller than DMFRc. Defoliated leaves may nevertheless represent a significant source of infection, depending on the amount of infectious tissues. Mother lesions within the canopy generated more daughter lesions in the medium (or lower) layers of the canopy than at its upper level (DMFRc higher at the medium and lower layers of a canopy), whereas DMFRd values seemed to decrease with height in the canopy. A mechanistic simulation model that combines host growth and disease-induced defoliation was designed to simulate the respective contributions of the two components of the dual inoculum source of a diseased canopy (infected foliage and defoliated infectious tissues), and varying infectious periods in both sources. Simulations suggest that higher DMFRc values have a large polycyclic effect on epidemics whereas that of DMFRd is small, and that large effects of the infectious period of lesions in the canopy are found when DMFRc is high. Simulations using experimentally measured DMFRc and DMFRd values indicated much stronger epidemics in rainy compared to dry conditions for spore dispersal, but disease persistence in the latter. The implications of considering a dual source of inoculum in the course of a polycyclic process are discussed with respect to epidemic thresholds.
650 $aPhaeoisariopsis griseola
650 $aDoença de Planta
650 $aFeijão
650 $aMancha Angular
650 $aPhaseolus Vulgaris
700 1 $aWILLOCQUET, L.
700 1 $aSARTORATO, A.
700 1 $aSAVARY, S.
773 $tEuropean Journal of Plant Pathology$gv. 113, n. 4, p. 377-394, Dec. 2005.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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| Registros recuperados : 2 | |
| 1. |  | OLIVEIRA, R. de S.; COSTA, G. do N.; SILVA, R. N. O.; LIMA, P. S. da C.; ARAUJO NETO, R. B. de; LOPES, A. C. de A. Genetic diversity among genotypes of Parkia platycephala (Benth.), a typical tree of northeastern Brazil. Acta Scientiarum, Biological Sciences, v. 45, e64168, 2023.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 2. | | OLIVEIRA, R. de S.; LIMA, P. S. da C.; COSTA, G. do N.; SILVA, R. N. O.; MARTINS, F. A.; LOPES, A. C. de A. Caracterização morfoagronômica de acessos de Parkia platycephala. In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA MEIO-NORTE, 4., 2018, Teresina, PI. Anais da IV Jornada Científica da Embrapa Meio-Norte. Brasília, DF: Embrapa, 2018. p. 22.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| Registros recuperados : 2 | |
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