Cargando…

Intraguild Interactions between Two Egg Parasitoids of a True Bug in Semi-Field and Field Conditions

Research on interspecific competitive interactions among insect parasitoids has often been characterized by laboratory studies in which host insects are exposed to female parasitoids of different species in various sequences and combinations. In the last years, an increasing number of studies have i...

Descripción completa

Detalles Bibliográficos
Autores principales: Peri, Ezio, Cusumano, Antonino, Amodeo, Valentina, Wajnberg, Eric, Colazza, Stefano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4062478/
https://www.ncbi.nlm.nih.gov/pubmed/24941172
http://dx.doi.org/10.1371/journal.pone.0099876
_version_ 1782321657526878208
author Peri, Ezio
Cusumano, Antonino
Amodeo, Valentina
Wajnberg, Eric
Colazza, Stefano
author_facet Peri, Ezio
Cusumano, Antonino
Amodeo, Valentina
Wajnberg, Eric
Colazza, Stefano
author_sort Peri, Ezio
collection PubMed
description Research on interspecific competitive interactions among insect parasitoids has often been characterized by laboratory studies in which host insects are exposed to female parasitoids of different species in various sequences and combinations. In the last years, an increasing number of studies have investigated interspecific interactions under field and semi-field conditions although just a few number of works focused on egg parasitoids. In this work, we undertook a two-year study to investigate interspecific interactions between Trissolcus basalis (Wollaston) (Hymenoptera: Platygastridae) and Ooencyrtus telenomicida (Vassiliev) (Hymenoptera: Encyrtidae), two egg parasitoids of the pest Nezara viridula (L.) (Heteroptera: Pentatomidae) that co-occur in cultivated crops. Under semi-field (in out-door mesh cages) and field conditions, we investigated: 1) the seasonal occurrence of competing parasitoid species on sentinel egg masses; 2) the impact achieved by competing species on the shared host on naturally laid egg masses; 3) the outcome of intraguild interactions under controlled conditions. Results from sentinel egg masses showed that T. basalis occurs in May and successfully parasitizes hosts until the end of September/beginning of October, whereas O. telenomicida is mainly occurring in July-August. In both years, it was found that T. basalis is predominant. From naturally laid egg masses, results indicated that T. basalis achieves higher impact on the hosts, even in those egg masses which are parasitized by more than one female of different species ( =  multiparasitism). Results from manipulating intraguild interactions showed that T. basalis achieves higher impact on N. viridula when released alone, but it suffers from competition with O. telenomicida. The ecological factors that play a role in intraguild interactions in the context of biological control perspective are discussed.
format Online
Article
Text
id pubmed-4062478
institution National Center for Biotechnology Information
language English
publishDate 2014
publisher Public Library of Science
record_format MEDLINE/PubMed
spelling pubmed-40624782014-06-24 Intraguild Interactions between Two Egg Parasitoids of a True Bug in Semi-Field and Field Conditions Peri, Ezio Cusumano, Antonino Amodeo, Valentina Wajnberg, Eric Colazza, Stefano PLoS One Research Article Research on interspecific competitive interactions among insect parasitoids has often been characterized by laboratory studies in which host insects are exposed to female parasitoids of different species in various sequences and combinations. In the last years, an increasing number of studies have investigated interspecific interactions under field and semi-field conditions although just a few number of works focused on egg parasitoids. In this work, we undertook a two-year study to investigate interspecific interactions between Trissolcus basalis (Wollaston) (Hymenoptera: Platygastridae) and Ooencyrtus telenomicida (Vassiliev) (Hymenoptera: Encyrtidae), two egg parasitoids of the pest Nezara viridula (L.) (Heteroptera: Pentatomidae) that co-occur in cultivated crops. Under semi-field (in out-door mesh cages) and field conditions, we investigated: 1) the seasonal occurrence of competing parasitoid species on sentinel egg masses; 2) the impact achieved by competing species on the shared host on naturally laid egg masses; 3) the outcome of intraguild interactions under controlled conditions. Results from sentinel egg masses showed that T. basalis occurs in May and successfully parasitizes hosts until the end of September/beginning of October, whereas O. telenomicida is mainly occurring in July-August. In both years, it was found that T. basalis is predominant. From naturally laid egg masses, results indicated that T. basalis achieves higher impact on the hosts, even in those egg masses which are parasitized by more than one female of different species ( =  multiparasitism). Results from manipulating intraguild interactions showed that T. basalis achieves higher impact on N. viridula when released alone, but it suffers from competition with O. telenomicida. The ecological factors that play a role in intraguild interactions in the context of biological control perspective are discussed. Public Library of Science 2014-06-18 /pmc/articles/PMC4062478/ /pubmed/24941172 http://dx.doi.org/10.1371/journal.pone.0099876 Text en © 2014 Peri et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Peri, Ezio
Cusumano, Antonino
Amodeo, Valentina
Wajnberg, Eric
Colazza, Stefano
Intraguild Interactions between Two Egg Parasitoids of a True Bug in Semi-Field and Field Conditions
title Intraguild Interactions between Two Egg Parasitoids of a True Bug in Semi-Field and Field Conditions
title_full Intraguild Interactions between Two Egg Parasitoids of a True Bug in Semi-Field and Field Conditions
title_fullStr Intraguild Interactions between Two Egg Parasitoids of a True Bug in Semi-Field and Field Conditions
title_full_unstemmed Intraguild Interactions between Two Egg Parasitoids of a True Bug in Semi-Field and Field Conditions
title_short Intraguild Interactions between Two Egg Parasitoids of a True Bug in Semi-Field and Field Conditions
title_sort intraguild interactions between two egg parasitoids of a true bug in semi-field and field conditions
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4062478/
https://www.ncbi.nlm.nih.gov/pubmed/24941172
http://dx.doi.org/10.1371/journal.pone.0099876
work_keys_str_mv AT periezio intraguildinteractionsbetweentwoeggparasitoidsofatruebuginsemifieldandfieldconditions
AT cusumanoantonino intraguildinteractionsbetweentwoeggparasitoidsofatruebuginsemifieldandfieldconditions
AT amodeovalentina intraguildinteractionsbetweentwoeggparasitoidsofatruebuginsemifieldandfieldconditions
AT wajnbergeric intraguildinteractionsbetweentwoeggparasitoidsofatruebuginsemifieldandfieldconditions
AT colazzastefano intraguildinteractionsbetweentwoeggparasitoidsofatruebuginsemifieldandfieldconditions