Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs

Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs

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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Main Authors: 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
Format: Digital revista
Language:English
Published: Embrapa Secretaria de Pesquisa e Desenvolvimento 2017
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001100961
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spelling oai:scielo:S0100-204X20170011009612017-12-13Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggsCarvalho,Gabriel dos SantosSilva,Luciana BarbozaReis,Soislan SousaVeras,Maisa SousaCarneiro,ElianeAlmeida,Mayra Layra dos SantosSilva,Alexandre Faria daLopes,Gleidyane Novais Trichogrammatidae biological control parasitoid temperature 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.info:eu-repo/semantics/openAccessEmbrapa Secretaria de Pesquisa e DesenvolvimentoPesquisa Agropecuária BrasileiraPesquisa Agropecuária Brasileira v.52 n.11 20172017-11-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001100961en10.1590/s0100-204x2017001100001
institution SCIELO
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country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
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region America del Sur
libraryname SciELO
language English
format Digital
author 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
spellingShingle 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
Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs
author_facet 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
author_sort Carvalho,Gabriel dos Santos
title Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs
title_short Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs
title_full Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs
title_fullStr Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs
title_full_unstemmed Biological parameters and thermal requirements of Trichogramma pretiosum reared on Helicoverpa armigera eggs
title_sort biological parameters and thermal requirements of trichogramma pretiosum reared on helicoverpa armigera eggs
description 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.
publisher Embrapa Secretaria de Pesquisa e Desenvolvimento
publishDate 2017
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001100961
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