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 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
11/10/1995 |
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Data da última atualização: |
31/05/2017 |
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Autoria: |
PARRA, J. R. P.; SA, L. A. N. de. |
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Afiliação: |
ESALQ/USP; LUIZ ALEXANDRE NOGUEIRA DE SA, CNPMA. |
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Título: |
Biological control of Helicoverpa zea (Boddie) in field and sweet corn through Trichogramma pretiosum Riley in the State of São Paulo, Brazil. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
In: INTERNATIONAL PLANT PROTECTION CONGRESS, 13., 1995, The Hague. Resumos. The Hague: Kluwer Academic, 1995. |
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Páginas: |
n.p. |
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Idioma: |
Inglês |
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Conteúdo: |
It is very common to observe a very high natural parasitism of the corn earworm Helicoverpa zea, by Trichogramma pretiosum under field conditions, in the State of Sao Paulo, Brazil. The parasitism is always superior to 50% and very often reachs levels of 95% in field corn. However, this high level of parasitism is observed only in the last generation of the pest, when the damage has already accurred. The inundative release of T. pretiosum, reared on a factitious host (Anagasta kuehniella), may be an alternative method to control the corn earwom. In this method, releases can be done at the beginning of the corn earworm oviposition period, which occurs at the onset of the corn silking stage. For the "Agrocica Super Doce" sweet corn variety, it was observed that the oviposition peak of H. zea coincides with the blooming stage of the corn. The population dynamics of the corn earworm eggs was correlated with the corn phenology, and we found that the first egg laying occurred 66 days after the germination. We observed that the H. zea biological control through T. pretiosum is possible, if we consider some aspects such as: selection of the most effective T. pretiosum atrain and three releases of T. pretiosum in a 4 day interval, with the first release when 35% of the plants is at silking stage and 75% of the male inflorescence has appeared. The parasitoid release resulted in an increase of parasitization and reduction of the H. zea damage up to 27% in corn ears. For field corn (dent corn variety C555) in two counties of the State of Sao Paulo, the release must also be done at the beginning of the H. zea egg laying. The dispersal capacity of T. pretiosum, 36 hours after release, ranged from 80 to 102m2. The results of this study indicated that releases for controlling the corn earworm should be done in 100 points/ha. For field releasses, it was observed an increase of up to 5 times in parasitism of H. zea eggs when 100,000 T. pretiosum adults/ha were released three times. H. zea damage in corn ears in T. pretiosum released areas was reduced 26%, showing the potential of this parasitoid for the control of the pest. The most agressive strain under laboratory conditions showed parasitism capacity higher in the first four days of the female's life. MenosIt is very common to observe a very high natural parasitism of the corn earworm Helicoverpa zea, by Trichogramma pretiosum under field conditions, in the State of Sao Paulo, Brazil. The parasitism is always superior to 50% and very often reachs levels of 95% in field corn. However, this high level of parasitism is observed only in the last generation of the pest, when the damage has already accurred. The inundative release of T. pretiosum, reared on a factitious host (Anagasta kuehniella), may be an alternative method to control the corn earwom. In this method, releases can be done at the beginning of the corn earworm oviposition period, which occurs at the onset of the corn silking stage. For the "Agrocica Super Doce" sweet corn variety, it was observed that the oviposition peak of H. zea coincides with the blooming stage of the corn. The population dynamics of the corn earworm eggs was correlated with the corn phenology, and we found that the first egg laying occurred 66 days after the germination. We observed that the H. zea biological control through T. pretiosum is possible, if we consider some aspects such as: selection of the most effective T. pretiosum atrain and three releases of T. pretiosum in a 4 day interval, with the first release when 35% of the plants is at silking stage and 75% of the male inflorescence has appeared. The parasitoid release resulted in an increase of parasitization and reduction of the H. zea damage up to 27% in corn ears. For field corn (den... Mostrar Tudo |
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Thesagro: |
Helicoverpa Zea. |
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Thesaurus Nal: |
biological control. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02875nam a2200157 a 4500
001 1012338
005 2017-05-31
008 1995 bl uuuu u00u1 u #d
100 1 $aPARRA, J. R. P.
245 $aBiological control of Helicoverpa zea (Boddie) in field and sweet corn through Trichogramma pretiosum Riley in the State of São Paulo, Brazil.$h[electronic resource]
260 $aIn: INTERNATIONAL PLANT PROTECTION CONGRESS, 13., 1995, The Hague. Resumos. The Hague: Kluwer Academic$c1995
300 $an.p.
520 $aIt is very common to observe a very high natural parasitism of the corn earworm Helicoverpa zea, by Trichogramma pretiosum under field conditions, in the State of Sao Paulo, Brazil. The parasitism is always superior to 50% and very often reachs levels of 95% in field corn. However, this high level of parasitism is observed only in the last generation of the pest, when the damage has already accurred. The inundative release of T. pretiosum, reared on a factitious host (Anagasta kuehniella), may be an alternative method to control the corn earwom. In this method, releases can be done at the beginning of the corn earworm oviposition period, which occurs at the onset of the corn silking stage. For the "Agrocica Super Doce" sweet corn variety, it was observed that the oviposition peak of H. zea coincides with the blooming stage of the corn. The population dynamics of the corn earworm eggs was correlated with the corn phenology, and we found that the first egg laying occurred 66 days after the germination. We observed that the H. zea biological control through T. pretiosum is possible, if we consider some aspects such as: selection of the most effective T. pretiosum atrain and three releases of T. pretiosum in a 4 day interval, with the first release when 35% of the plants is at silking stage and 75% of the male inflorescence has appeared. The parasitoid release resulted in an increase of parasitization and reduction of the H. zea damage up to 27% in corn ears. For field corn (dent corn variety C555) in two counties of the State of Sao Paulo, the release must also be done at the beginning of the H. zea egg laying. The dispersal capacity of T. pretiosum, 36 hours after release, ranged from 80 to 102m2. The results of this study indicated that releases for controlling the corn earworm should be done in 100 points/ha. For field releasses, it was observed an increase of up to 5 times in parasitism of H. zea eggs when 100,000 T. pretiosum adults/ha were released three times. H. zea damage in corn ears in T. pretiosum released areas was reduced 26%, showing the potential of this parasitoid for the control of the pest. The most agressive strain under laboratory conditions showed parasitism capacity higher in the first four days of the female's life.
650 $abiological control
650 $aHelicoverpa Zea
700 1 $aSA, L. A. N. de
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| Registros recuperados : 327 | |
| 42. |  | SA, L. A. N. de; PARRA, J. R. P. Biologia e parasitismo de Trichogramma pretiosum Riley, 1879 sobre ovos de Anagasta kuehniella (Zeller, 1879), Helicoverpa zea (Boddie, 1850) e Spodoptera frugiperda (J.E. Smith, 1797). In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 14., 1993, Piracicaba. Resumos. Piracicaba: Sociedade Entomológica do Brasil, 1993. p.260| Biblioteca(s): Embrapa Meio Ambiente. |
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| 52. | | SA, L. A. N. de; PESSOA, M. C. P. Y. Prospecção de inimigos naturais para o controle biológico de pragas agrícolas exóticas. In: SUGAYAMA, R. L.; SILVA, M. L. da.; SILVA, S. X. de B.; RIBEIRO, L. C.; RANGEL, L. E. P. (Ed.). Defesa vegetal: fundamentos, ferramentas, políticas e perspectivas. Belo Horizonte: Sociedade Brasileira de Defesa Agropecuária, 2015. p. 256-274.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 56. | | CAPALBO, D. M. F.; SA, L. A. N. de. Controle biológico no Brasil: avanços, desenvolvimento, recomendações. In: CONGRESO INTERNACIONAL DE CONTROL BIOLOGICO, 4., 2006, Palmira, Colombia. Memorias: control biológico de plagas, patógenos y arvenses en la agricultura. Palmira, Colombia: SRNT, 2006. p. 1-4.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| Registros recuperados : 327 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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