| Registro completo |
| Provedor de dados: |
Biological Sciences
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| País: |
Brazil
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| Título: |
Age and density of eggs of Helicoverpa armigera influence on Trichogramma pretiosum parasitism
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| Autores: |
Zuim, Vitor
Rodrigues, Hígor de Souza
Pratissoli, Dirceu
Torres, Jorge Braz
Fragoso, Débora Ferreira Melo
Bueno, Regiane Cristina Oliveira de Freitas
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| Data: |
2017-11-24
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| Ano: |
2017
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| Palavras-chave: |
Agronomia
Fitossanidade
Parasitologia Agrícola Biological control
Exotic pest
Egg parasitoid
Host-parasitoid interaction
Noctuidae
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| Resumo: |
This study evaluated the parasitism of Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) on eggs of Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) at different ages and densities. The rates of parasitism and emergence, the number of parasitoids emerged per egg and sex ratio of offspring were evaluated in both experiments. Eggs of H. armigera up to 36 hours provided greater parasitism and emergence of adults compared to eggs up to 60 hours old. The number of parasitoids, which emerged per host egg, was greater than one and the sex ratio remained around 80% of females, regardless of the egg development stage. Females of T. pretiosum responded with superior rates of parasitism, emergence and number of parasitoids per egg at the densities of 20 and 25 eggs of H. armigera. These results indicate that T. pretiosum parasite with superior performance in eggs of up to 36h of age and densities of 20 eggs per female day-1 in laboratory conditions. These results will help to establish the intervals between releases of parasitoids, aiming to control this pest, when adjusted with knowledge of the survival of the parasitoids in the field and in pest infestation.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/34943
10.4025/actascibiolsci.v39i4.34943
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| Editor: |
Universidade Estadual De Maringá
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| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/34943/pdf
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| Formato: |
application/pdf
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| Fonte: |
Acta Scientiarum. Biological Sciences; v. 39, n. 4 (2017); 513-520
Acta Scientiarum. Biological Sciences; v. 39, n. 4 (2017); 513-520
1807-863X
1679-9283
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| Direitos: |
Direitos autorais 2017 Acta Scientiarum. Biological Sciences
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