<b>Selection of parasitoids of the genus <i>Trichogramma </i>(Hymenoptera: Trichogrammatidae) and parasitism at different eggs ages of <i>Duponchelia fovealis</i> (Lepidoptera: Crambidae)

<b>Selection of parasitoids of the genus <i>Trichogramma </i>(Hymenoptera: Trichogrammatidae) and parasitism at different eggs ages of <i>Duponchelia fovealis</i> (Lepidoptera: Crambidae)

  The European pepper moth Duponchelia fovealis (Zeller, 1847) (Lepidoptera: Crambidae), despite being among the principal pests of strawberries in Brazil. However, biological control methods are rarely documented for this pest. In the current study, the goal was to select promising Trichogramma str...

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Bibliographic Details
Main Authors: João Paulo Pereira Paes, Victor Luiz Souza Lima, Dirceu Pratisolli, José Romário de Carvalho, Regiane Cristina Oliveira de Freitas Bueno
Format: Article
Language:English
Published: Universidade Estadual de Maringá 2018-07-01
Series:Acta Scientiarum: Biological Sciences
Subjects:
biological control
egg parasitoid
parasitism percentage
European pepper moth
host age.
Online Access:https://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/42216
Description
Summary:  The European pepper moth Duponchelia fovealis (Zeller, 1847) (Lepidoptera: Crambidae), despite being among the principal pests of strawberries in Brazil. However, biological control methods are rarely documented for this pest. In the current study, the goal was to select promising Trichogramma strains to enable the control of D. fovealis and to determine the acceptance of different ages of host eggs by the parasitoid. In the first bioassay, evaluations were done on the biological parameters of five strains of Trichogramma pretiosum Riley and one of Trichogramma galloi Zucchi (Hymenoptera: Trichogrammatidae). The best performance came from the strains, Tp18 (T. pretiosum) and Tg (T. galloi), showing parasitism and viability higher than 50 and 90%, respectively. Another bioassay revealed the acceptance of both these species (Tp18 and Tg) for different ages of D. fovealis eggs. All host ages were accepted by T. pretiosum (Tp18) and T. galloi, with a preference for younger eggs (65% parasitism). Adult emergence, number of individuals per egg and sex ratio revealed no significant differences with respect to the host age. The current study provides pertinent data on the selection and performance of Trichogramma species on D. fovealis eggs of different ages.  
ISSN:1679-9283
1807-863X

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