| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs
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| Autores: |
Carvalho,Gabriel dos Santos
Silva,Luciana Barboza
Reis,Soislan Sousa
Veras,Maisa Sousa
Carneiro,Eliane
Almeida,Mayra Layra dos Santos
Silva,Alexandre Faria da
Lopes,Gleidyane Novais
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| Data: |
2017-11-01
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| Ano: |
2017
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| Palavras-chave: |
Trichogrammatidae
Biological control
Parasitoid
Temperature
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| Resumo: |
Abstract: The objective of this work was to determine the biological parameters and thermal requirements of Trichogramma pretiosum TM strain reared on Helicoverpa armigera eggs. A card containing 20 eggs of H. armigera was offered for each T. pretiosum female, at temperatures of 18, 20, 22, 25, 28, 30 and 32°C. All life stages of T. pretiosum were observed under the given temperature conditions. The optimum temperature for the parasitism of T. pretiosum was 25°C, and the highest longevity was found at the same temperature. The highest parasitoid emergence rates occurred at temperatures of 22, 25 and 28°C. The highest proportion of T. pretiosum individuals emerged per egg was observed at 18°C. Concerning the sex ratio, the highest proportion of females occurred at 28°C, and the highest percentage of parasitism viability was observed at this same temperature. The lowest thermal threshold for total preimaginal development and thermal requirements of T. pretiosum were 10.82°C and 134.55 degree-days, respectively. The estimated number of generations of T. pretiosum in the average temperatures of municipality of Bom Jesus, state of Piauí, Brazil is four per month.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001100961
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/s0100-204x2017001100001
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.52 n.11 2017
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| Direitos: |
info:eu-repo/semantics/openAccess
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