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Título
Laboratory evaluation of Ooencyrtus obscurus (Mercet) (Hymenoptera: Encyrtidae) on Leptoglossus occidentalis Heidemann (Hemiptera: Coreidae) eggs
Autor
Año del Documento
2023
Editorial
Elsevier
Descripción
Producción Científica
Documento Fuente
Biological Control, 2023, vol. 178, art. 105135
Abstract
Leptoglossus occidentalis Heidemann (Hemiptera: Coreidae), known as the western conifer seed bug (WCSB), is
a significant pest of the Pinus pinea L. kernel sector in the Mediterranean basin. The egg parasitoid species
Ooencyrtus obscurus (Mercet) (Hymenoptera: Encyrtidae) has been recently recorded on WCSB eggs in Central
Spain. This study defines the influence of the egg cluster size on the parasitism rate of O. obscurus, its reproductive
and demographic parameters with the goal of defining the potential of this species to be a biological control
agent. Ooencyrtus obscurus is weakly synovigenic, with the parasitism period concentrating in the first two
weeks, reaching its maximum level of intensity on the 1st day (30.2 %). The mean oviposition period was
2.3 days, with the mean female longevity being 16.9 days. The mean rate of pre-imaginal survival was high
(96.7 %), with the mean pre-imaginal development time being significantly higher for females than for males.
The sex ratio (% females) was 41.2 %, while the reproductive strategy was defined as being pseudoarrhenotokous
parthenogenesis after comparing mated and unmated female offspring. Regarding demographic
parameters, a single O. obscurus female was able to produce more than 3 female offspring (R0) in a generation
time (T) of 23.96 days, multiply its population 1.05 times a day (λ), and double it in 14.34 days (Td). The
comparison between these results and those established for the main egg parasitoid of the WCSB in its native
area could allow for decisions to be made on the type of biological control program to be applied in Europe.
Materias Unesco
3108 Fitopatología
Palabras Clave
Western conifer seed bug (WCSB)
Native egg parasitoid
Biological control program
Lifetime fecundity
Life history
Demographic parameters
ISSN
1049-9644
Revisión por pares
SI
Patrocinador
This work was supported by the “Convenio de colaboración entre la Consejería de Fomento y Medio Ambiente de la Junta de Castilla y León y la Universidad de Valladolid para la realización de un estudio sobre plagas de perforadores de piñas en Pinus pinea L.”
Ponce-Herrero is a recipient of grants from the European Social Fund and from the Consejería de Educación de Castilla y León (JCyL) (ORDEN EDU/1100/2017)
Ponce-Herrero is a recipient of grants from the European Social Fund and from the Consejería de Educación de Castilla y León (JCyL) (ORDEN EDU/1100/2017)
Version del Editor
Propietario de los Derechos
© Elsevier
Idioma
eng
Tipo de versión
info:eu-repo/semantics/acceptedVersion
Derechos
openAccess
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