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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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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
14/03/2008 |
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Data da última atualização: |
02/10/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
SILVA, A. A. G. da; BARROS, A. H. C.; VAREJÃO-SILVA, M. A.; ANDRADE JÚNIOR, A. S. de; BATISTA, W. R. M. |
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Afiliação: |
Ana Alexandrina Gama da Silva, Embrapa Tabuleiros Costeiros; Wagner Roberto Milet Batista, (Estagiário) Embrapa Tabuleiros Costeiros; Mário Adelmo Varejão Silva, Agroconsult; Aderson Soares de Andrade Júnior, Embrapa Meio Norte; Wagner Roberto Milet Batista, (Estagiário) Embrapa Tabuleiros Costeiros. |
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Título: |
Zoneamento de risco climático para a cultura da mangueira no Estado da Bahia. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 15., 2007, Aracaju. Efeito das mudanças climáticas na agricultura: anais. Campinas: Sociedade Brasileira de Agrometeorologia, 2007. |
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Páginas: |
6 p. |
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Idioma: |
Português |
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Notas: |
1 CD-ROM. |
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Thesagro: |
Clima; Manga; Mangifera Indica. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/69557/1/100-08.pdf
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Marc: |
LEADER 00741nam a2200205 a 4500
001 1069557
005 2023-10-02
008 2007 bl uuuu u00u1 u #d
100 1 $aSILVA, A. A. G. da
245 $aZoneamento de risco climático para a cultura da mangueira no Estado da Bahia.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 15., 2007, Aracaju. Efeito das mudanças climáticas na agricultura: anais. Campinas: Sociedade Brasileira de Agrometeorologia$c2007
300 $a6 p.
500 $a1 CD-ROM.
650 $aClima
650 $aManga
650 $aMangifera Indica
700 1 $aBARROS, A. H. C.
700 1 $aVAREJÃO-SILVA, M. A.
700 1 $aANDRADE JÚNIOR, A. S. de
700 1 $aBATISTA, W. R. M.
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