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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
13/12/2005 |
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Data da última atualização: |
13/12/2005 |
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Autoria: |
MOREIRA, M. D.; PICANÇO, M. C.; SKOLWRONSKI, L.; COUTO, F. A. d' A.; ROSADO, J. F.; FIDELIS, E. G. |
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Afiliação: |
UFV. |
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Título: |
Interferência in vitro de pesticidas e condições ideiais para a germinação e crescimento do tubo polínico do mamoeiro (Carica papaya L.). |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Acta Scientiarum. Agronomy, Maringá, v. 27, n. 1, p.171-176, 2005. |
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ISSN: |
1679-9275 |
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Idioma: |
Português |
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Conteúdo: |
Este trabalho objetivou estudar interferência in vitro de pesticidas e as condições ideais para a germinação e crescimento do tubo polínico do mamoeiro (Carica papaya L.). Para a realização deste trabalho, foram conduzidos quatro experimentos na Universidade Federal de Viçosa, Estado de Minas Gerais, de março de 1995 a março de 1997. Verificou-se que os grãos-de-pólen do mamoeiro possuem um tempo de germinação menor que 12 horas. A maior porcentagem de germinação foi obtida com a coleta de pólen até a antese e com o meio de cultura contendo 1% de ágar, 8% de sacarose e 0,002% de 2,4-D. O metamidofós, dimetoato, tiofanato metílico, benomil e permetrina não apresentaram toxicidade aos grãos-de-pólen. O pirimicarb, a abamectina e o espalhante adesivo nonil fenoxi poli (etilenoxi) etanol reduziram a germinação dos grãos-de-pólen. O enxofre reduziu tanto a germinação quanto o comprimento do tubo polínico. O clorotalonil, dicofol, mancozeb, naled, captan e oxicloreto de cobre inibiram completamente a germinação dos grãos-de-pólen. |
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Palavras-Chave: |
acaricidas; espalhante adesivo; fungicidas; inseticidas. |
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Thesagro: |
Fitotoxicidade. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01845naa a2200253 a 4500
001 1653413
005 2005-12-13
008 2005 bl uuuu u00u1 u #d
022 $a1679-9275
100 1 $aMOREIRA, M. D.
245 $aInterferência in vitro de pesticidas e condições ideiais para a germinação e crescimento do tubo polínico do mamoeiro (Carica papaya L.).
260 $c2005
520 $aEste trabalho objetivou estudar interferência in vitro de pesticidas e as condições ideais para a germinação e crescimento do tubo polínico do mamoeiro (Carica papaya L.). Para a realização deste trabalho, foram conduzidos quatro experimentos na Universidade Federal de Viçosa, Estado de Minas Gerais, de março de 1995 a março de 1997. Verificou-se que os grãos-de-pólen do mamoeiro possuem um tempo de germinação menor que 12 horas. A maior porcentagem de germinação foi obtida com a coleta de pólen até a antese e com o meio de cultura contendo 1% de ágar, 8% de sacarose e 0,002% de 2,4-D. O metamidofós, dimetoato, tiofanato metílico, benomil e permetrina não apresentaram toxicidade aos grãos-de-pólen. O pirimicarb, a abamectina e o espalhante adesivo nonil fenoxi poli (etilenoxi) etanol reduziram a germinação dos grãos-de-pólen. O enxofre reduziu tanto a germinação quanto o comprimento do tubo polínico. O clorotalonil, dicofol, mancozeb, naled, captan e oxicloreto de cobre inibiram completamente a germinação dos grãos-de-pólen.
650 $aFitotoxicidade
653 $aacaricidas
653 $aespalhante adesivo
653 $afungicidas
653 $ainseticidas
700 1 $aPICANÇO, M. C.
700 1 $aSKOLWRONSKI, L.
700 1 $aCOUTO, F. A. d' A.
700 1 $aROSADO, J. F.
700 1 $aFIDELIS, E. G.
773 $tActa Scientiarum. Agronomy, Maringá$gv. 27, n. 1, p.171-176, 2005.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
15/07/1999 |
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Data da última atualização: |
15/07/1999 |
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Autoria: |
AYARZA, M. A.; VILELA, L.; PIZARRO, E. A.; COSTA, P. H. da. |
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Título: |
Agropastoral systems based on legumes: an alternative for sustainable agriculture in the Brazilian cerrados. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999. |
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Páginas: |
p.22-36. |
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Idioma: |
Inglês |
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Conteúdo: |
Grain, meat, and milk production systems in the Brazilian savannas, also known as the Cerrados, are currently experiencing increasing economic and environmental problems. These problems could have detrimental effects on the natural resource base and on the sustainability of agriculture in the region over the long term if alternative systems are not developed. One option that would intensify agricultural production while minimizing negative impacts on soil and water involves the integration of cropping and livestock systems in time and space (agropastoralism). Since 1992, CIAT and EMBRAPA-CPAC have worked together with other institutions to develop agropastoral systems that are based on forage legumes adapted to low and high inputs, and to quantify their impact on productivity and on soil. Most of these activities were carried out on farms in the Uberlandia region of the State of Minas Gerais in central Brazil. Experiments with the legumes Stylosanthes guianensis cv. Mineirao and Arachis pintoi BRA-031143 in crop/pasture systems showed that while the first legume was effective in low-input systems, the latter was better adapted to high-input systems, crop rotation (ley farming) or as a permanent ground cover in direct sowing. However, chemical or mechanical methods were needed to control A. pintoi's competitivenss with crops. The results of a crop/livestock case study confirmed the synergistic effect on production and soil quality. Soil fertility increased during the cropping cycle, whereas soil aggregation and soil organic matter increased under the pasture phase. Organic matter also underwent a process of physical protection under pastures, especially in sandy soils. Subsequent surveys showed that crop/livestock integration is gaining aceptance amongst grain producers. MenosGrain, meat, and milk production systems in the Brazilian savannas, also known as the Cerrados, are currently experiencing increasing economic and environmental problems. These problems could have detrimental effects on the natural resource base and on the sustainability of agriculture in the region over the long term if alternative systems are not developed. One option that would intensify agricultural production while minimizing negative impacts on soil and water involves the integration of cropping and livestock systems in time and space (agropastoralism). Since 1992, CIAT and EMBRAPA-CPAC have worked together with other institutions to develop agropastoral systems that are based on forage legumes adapted to low and high inputs, and to quantify their impact on productivity and on soil. Most of these activities were carried out on farms in the Uberlandia region of the State of Minas Gerais in central Brazil. Experiments with the legumes Stylosanthes guianensis cv. Mineirao and Arachis pintoi BRA-031143 in crop/pasture systems showed that while the first legume was effective in low-input systems, the latter was better adapted to high-input systems, crop rotation (ley farming) or as a permanent ground cover in direct sowing. However, chemical or mechanical methods were needed to control A. pintoi's competitivenss with crops. The results of a crop/livestock case study confirmed the synergistic effect on production and soil quality. Soil fertility increased during the cropping... Mostrar Tudo |
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Palavras-Chave: |
Agropastoral systems; Brasil; Rotational cropping; Sistema agropastoril. |
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Thesagro: |
Cerrado; Rotação de Cultura. |
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Thesaurus NAL: |
Arachis; Brazil; Stylosanthes. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02708naa a2200277 a 4500
001 1545396
005 1999-07-15
008 1999 bl uuuu u00u1 u #d
100 1 $aAYARZA, M. A.
245 $aAgropastoral systems based on legumes$ban alternative for sustainable agriculture in the Brazilian cerrados.
260 $c1999
300 $ap.22-36.
520 $aGrain, meat, and milk production systems in the Brazilian savannas, also known as the Cerrados, are currently experiencing increasing economic and environmental problems. These problems could have detrimental effects on the natural resource base and on the sustainability of agriculture in the region over the long term if alternative systems are not developed. One option that would intensify agricultural production while minimizing negative impacts on soil and water involves the integration of cropping and livestock systems in time and space (agropastoralism). Since 1992, CIAT and EMBRAPA-CPAC have worked together with other institutions to develop agropastoral systems that are based on forage legumes adapted to low and high inputs, and to quantify their impact on productivity and on soil. Most of these activities were carried out on farms in the Uberlandia region of the State of Minas Gerais in central Brazil. Experiments with the legumes Stylosanthes guianensis cv. Mineirao and Arachis pintoi BRA-031143 in crop/pasture systems showed that while the first legume was effective in low-input systems, the latter was better adapted to high-input systems, crop rotation (ley farming) or as a permanent ground cover in direct sowing. However, chemical or mechanical methods were needed to control A. pintoi's competitivenss with crops. The results of a crop/livestock case study confirmed the synergistic effect on production and soil quality. Soil fertility increased during the cropping cycle, whereas soil aggregation and soil organic matter increased under the pasture phase. Organic matter also underwent a process of physical protection under pastures, especially in sandy soils. Subsequent surveys showed that crop/livestock integration is gaining aceptance amongst grain producers.
650 $aArachis
650 $aBrazil
650 $aStylosanthes
650 $aCerrado
650 $aRotação de Cultura
653 $aAgropastoral systems
653 $aBrasil
653 $aRotational cropping
653 $aSistema agropastoril
700 1 $aVILELA, L.
700 1 $aPIZARRO, E. A.
700 1 $aCOSTA, P. H. da
773 $tIn: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999.
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Embrapa Cerrados (CPAC) |
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