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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
17/09/2012 |
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Data da última atualização: |
17/09/2012 |
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Autoria: |
MEDEIROS, H. R. de. |
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Título: |
Avaliação de modelos matemáticos desenvolvidos para auxiliar a tomada de decisão em sistemas de produção de ruminantes em pastagens. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
2003. |
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Páginas: |
98 f. |
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Idioma: |
Português |
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Notas: |
Tese (Doutorado em Agronomia) - Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba. |
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Conteúdo: |
Conceitos de sistemas e modelos matemáticos; Modelagem matemática da dinâmica da pastagem; Avaliação do modelo stockpol nos sitemas de pecuária de corte brasileiro; Validação de um modelo matemático para estimar o acúmulo de forragem em função de variáveis climáticas; Avaliação de modelos matemáticos para estimar o consumo de forragem e o desempenho animal em pastagens. |
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Thesagro: |
Irrigação; Pastagem; Ruminante. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00987nam a2200169 a 4500
001 1933875
005 2012-09-17
008 2003 bl uuuu m 00u1 u #d
100 1 $aMEDEIROS, H. R. de
245 $aAvaliação de modelos matemáticos desenvolvidos para auxiliar a tomada de decisão em sistemas de produção de ruminantes em pastagens.
260 $a2003.$c2003
300 $a98 f.
500 $aTese (Doutorado em Agronomia) - Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba.
520 $aConceitos de sistemas e modelos matemáticos; Modelagem matemática da dinâmica da pastagem; Avaliação do modelo stockpol nos sitemas de pecuária de corte brasileiro; Validação de um modelo matemático para estimar o acúmulo de forragem em função de variáveis climáticas; Avaliação de modelos matemáticos para estimar o consumo de forragem e o desempenho animal em pastagens.
650 $aIrrigação
650 $aPastagem
650 $aRuminante
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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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: |
18/12/2009 |
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Data da última atualização: |
07/10/2010 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
BASTOS, C. S.; TORRES, J. B.; SUINAGA, F. A. |
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Afiliação: |
C. S. BASTOS, UnB/FAV; J. B. TORRES, UFRPE; FABIO AKIYOSHI SUINAGA, CPAC. |
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Título: |
Parasitism of cotton leafworm Alabama argillacea eggs by Trichogramma pretiosum in commercial cotton fields. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Journal of Applied Entomology, 2009. |
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DOI: |
10.1111/j.1439-0418.2009.01492x |
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Idioma: |
Português |
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Conteúdo: |
Release of natural enemies in commercial fields in challenging and has been inconsistent in the results achieved. This work discusses the augmentative releases of Trichogramma pretiosum to control the cotton leafworm (CLW) Alabama argillacea and also examines the parasitoid-host interaction under grower field conditions. The tratments consisted of fields with and without releases of T. pretiosum set up in Primavera do Leste and Campo Verde counties, MT, Brazil, during three different seasons (2003 and 2004 dry and 2004 regular summer seasons). Trichogrammar wasps werw weekly released in the treated fields through-out the entire sampling period (14-15 weel period) at a rate of 1000 000 wasps per hectare. One-way repeated measures analysis of variance was performed for the number of parasitized eggs, followed by a meta-analysis procedure to determine the contribution of T. pretiosum release on overall parasitism. In addition, regression analysis was conducted with each season's data sets to study the relationship of the host density and parasitism response by T. pretiosum. Th overall results of Trichogramma augmentative releases did not result in significant increase of CLW egg parasitism beyond the natural parasitism in the areas studied. However, based on Cohen's d effect sizes from the meta-analysis, the parasitism rate was greater in fields under T. pretiosum releases during four out of 15 weeks surveyed. These findings are encouraging as they are evidence that T. pretiosum is able to maintain a considerable level of parasitism under commercial field conditions, highlighting their potential value in large-scale commercial areas of cotton as previously found at the small and diverse farming scale. Future studies should address the potential of early-season, low density releases of the parasitoid. MenosRelease of natural enemies in commercial fields in challenging and has been inconsistent in the results achieved. This work discusses the augmentative releases of Trichogramma pretiosum to control the cotton leafworm (CLW) Alabama argillacea and also examines the parasitoid-host interaction under grower field conditions. The tratments consisted of fields with and without releases of T. pretiosum set up in Primavera do Leste and Campo Verde counties, MT, Brazil, during three different seasons (2003 and 2004 dry and 2004 regular summer seasons). Trichogrammar wasps werw weekly released in the treated fields through-out the entire sampling period (14-15 weel period) at a rate of 1000 000 wasps per hectare. One-way repeated measures analysis of variance was performed for the number of parasitized eggs, followed by a meta-analysis procedure to determine the contribution of T. pretiosum release on overall parasitism. In addition, regression analysis was conducted with each season's data sets to study the relationship of the host density and parasitism response by T. pretiosum. Th overall results of Trichogramma augmentative releases did not result in significant increase of CLW egg parasitism beyond the natural parasitism in the areas studied. However, based on Cohen's d effect sizes from the meta-analysis, the parasitism rate was greater in fields under T. pretiosum releases during four out of 15 weeks surveyed. These findings are encouraging as they are evidence that T. pretiosu... Mostrar Tudo |
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Thesagro: |
Algodão; Gossypium hirsutum; Parasitismo. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02398naa a2200193 a 4500
001 1578362
005 2010-10-07
008 2009 bl --- 0-- u #d
024 7 $a10.1111/j.1439-0418.2009.01492x$2DOI
100 1 $aBASTOS, C. S.
245 $aParasitism of cotton leafworm Alabama argillacea eggs by Trichogramma pretiosum in commercial cotton fields.
260 $c2009
520 $aRelease of natural enemies in commercial fields in challenging and has been inconsistent in the results achieved. This work discusses the augmentative releases of Trichogramma pretiosum to control the cotton leafworm (CLW) Alabama argillacea and also examines the parasitoid-host interaction under grower field conditions. The tratments consisted of fields with and without releases of T. pretiosum set up in Primavera do Leste and Campo Verde counties, MT, Brazil, during three different seasons (2003 and 2004 dry and 2004 regular summer seasons). Trichogrammar wasps werw weekly released in the treated fields through-out the entire sampling period (14-15 weel period) at a rate of 1000 000 wasps per hectare. One-way repeated measures analysis of variance was performed for the number of parasitized eggs, followed by a meta-analysis procedure to determine the contribution of T. pretiosum release on overall parasitism. In addition, regression analysis was conducted with each season's data sets to study the relationship of the host density and parasitism response by T. pretiosum. Th overall results of Trichogramma augmentative releases did not result in significant increase of CLW egg parasitism beyond the natural parasitism in the areas studied. However, based on Cohen's d effect sizes from the meta-analysis, the parasitism rate was greater in fields under T. pretiosum releases during four out of 15 weeks surveyed. These findings are encouraging as they are evidence that T. pretiosum is able to maintain a considerable level of parasitism under commercial field conditions, highlighting their potential value in large-scale commercial areas of cotton as previously found at the small and diverse farming scale. Future studies should address the potential of early-season, low density releases of the parasitoid.
650 $aAlgodão
650 $aGossypium hirsutum
650 $aParasitismo
700 1 $aTORRES, J. B.
700 1 $aSUINAGA, F. A.
773 $tJournal of Applied Entomology, 2009.
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