Influence of distance from the host on parasitisation by Psyttalia concolor (Szépligeti) (Hymenoptera: Braconidae)

Gabriella Lo Verde, Francesco Tortorici, Alberto Lombardo, Virgilio Caleca, Flutura Lamaj, Vincenzo Verrastro, Nuray Baser, Gülay Kaçar

Risultato della ricerca: Article

Abstract

The olive fruit fly, Bactrocera oleae, is considered the main olive pest worldwide, and has been the target of biological control programmes through the release of the braconid parasitoid Psyttalia concolor. Laboratory tests were performed to evaluate the influence of distance from the host on parasitisation, placing larvae of the substitute host Ceratitis capitata at seven distances (0, 0.5, 1, 1.5, 2, 2.5, 3 mm) and four different time periods (7, 15, 30, 60 min). Moreover, field collected olives of Ogliarola Barese cultivar infested by B. oleae were exposed to P. concolor females to confirm its ability to parasitise B. oleae in small olives. Psyttalia concolor oviposition was inhibited at 2.5 and 3 mm due to the ovipositor length of the parasitoid females (2.7 mm). Hosts were easily parasitised at distances between 0 and 1.5 mm. The thin fruit pulp (up to 3.5 mm) of field collected olives allowed the parasitisation to occur also in mature fruits. At the best combination distance/time (0 mm, 30 min), tests performed with different larvae/parasitoid female ratio showed an increasing emergence of P. concolor (from 20% to 57%) with larvae/parasitoid ratio increasing from 0.11 to 0.74. The results of the present study might optimise the mass rearing of P. concolor, through a proper setting of its parameters, such as the host/parasitoid ratio, exposure distances, and interaction time.
Lingua originaleEnglish
pagine (da-a)1-14
Numero di pagine14
RivistaInsects
Volume10
Stato di pubblicazionePublished - 2019

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Psyttalia
Bactrocera oleae
Braconidae
parasitism
Hymenoptera
larvae
ovipositor
mass rearing
fruit pulp
Ceratitis capitata
eclosion
biological control
oviposition
pests
fruits
cultivars
testing

All Science Journal Classification (ASJC) codes

  • Insect Science

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Influence of distance from the host on parasitisation by Psyttalia concolor (Szépligeti) (Hymenoptera: Braconidae). / Lo Verde, Gabriella; Tortorici, Francesco; Lombardo, Alberto; Caleca, Virgilio; Lamaj, Flutura; Verrastro, Vincenzo; Baser, Nuray; Kaçar, Gülay.

In: Insects, Vol. 10, 2019, pag. 1-14.

Risultato della ricerca: Article

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title = "Influence of distance from the host on parasitisation by Psyttalia concolor (Sz{\'e}pligeti) (Hymenoptera: Braconidae)",
abstract = "The olive fruit fly, Bactrocera oleae, is considered the main olive pest worldwide, and has been the target of biological control programmes through the release of the braconid parasitoid Psyttalia concolor. Laboratory tests were performed to evaluate the influence of distance from the host on parasitisation, placing larvae of the substitute host Ceratitis capitata at seven distances (0, 0.5, 1, 1.5, 2, 2.5, 3 mm) and four different time periods (7, 15, 30, 60 min). Moreover, field collected olives of Ogliarola Barese cultivar infested by B. oleae were exposed to P. concolor females to confirm its ability to parasitise B. oleae in small olives. Psyttalia concolor oviposition was inhibited at 2.5 and 3 mm due to the ovipositor length of the parasitoid females (2.7 mm). Hosts were easily parasitised at distances between 0 and 1.5 mm. The thin fruit pulp (up to 3.5 mm) of field collected olives allowed the parasitisation to occur also in mature fruits. At the best combination distance/time (0 mm, 30 min), tests performed with different larvae/parasitoid female ratio showed an increasing emergence of P. concolor (from 20{\%} to 57{\%}) with larvae/parasitoid ratio increasing from 0.11 to 0.74. The results of the present study might optimise the mass rearing of P. concolor, through a proper setting of its parameters, such as the host/parasitoid ratio, exposure distances, and interaction time.",
author = "{Lo Verde}, Gabriella and Francesco Tortorici and Alberto Lombardo and Virgilio Caleca and Flutura Lamaj and Vincenzo Verrastro and Nuray Baser and G{\"u}lay Ka{\cc}ar",
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T1 - Influence of distance from the host on parasitisation by Psyttalia concolor (Szépligeti) (Hymenoptera: Braconidae)

AU - Lo Verde, Gabriella

AU - Tortorici, Francesco

AU - Lombardo, Alberto

AU - Caleca, Virgilio

AU - Lamaj, Flutura

AU - Verrastro, Vincenzo

AU - Baser, Nuray

AU - Kaçar, Gülay

PY - 2019

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N2 - The olive fruit fly, Bactrocera oleae, is considered the main olive pest worldwide, and has been the target of biological control programmes through the release of the braconid parasitoid Psyttalia concolor. Laboratory tests were performed to evaluate the influence of distance from the host on parasitisation, placing larvae of the substitute host Ceratitis capitata at seven distances (0, 0.5, 1, 1.5, 2, 2.5, 3 mm) and four different time periods (7, 15, 30, 60 min). Moreover, field collected olives of Ogliarola Barese cultivar infested by B. oleae were exposed to P. concolor females to confirm its ability to parasitise B. oleae in small olives. Psyttalia concolor oviposition was inhibited at 2.5 and 3 mm due to the ovipositor length of the parasitoid females (2.7 mm). Hosts were easily parasitised at distances between 0 and 1.5 mm. The thin fruit pulp (up to 3.5 mm) of field collected olives allowed the parasitisation to occur also in mature fruits. At the best combination distance/time (0 mm, 30 min), tests performed with different larvae/parasitoid female ratio showed an increasing emergence of P. concolor (from 20% to 57%) with larvae/parasitoid ratio increasing from 0.11 to 0.74. The results of the present study might optimise the mass rearing of P. concolor, through a proper setting of its parameters, such as the host/parasitoid ratio, exposure distances, and interaction time.

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