RT info:eu-repo/semantics/article
T1 Laboratory evaluation of Ooencyrtus obscurus (Mercet) (Hymenoptera: Encyrtidae) on Leptoglossus occidentalis Heidemann (Hemiptera: Coreidae) eggs
A1 Ponce Herrero, Laura
A1 Pando Fernández, Valentín
A1 Alves Santos, Fernando Manuel
A1 Pajares Alonso, Juan Alberto
K1 Western conifer seed bug (WCSB)
K1 Native egg parasitoid
K1 Biological control program
K1 Lifetime fecundity
K1 Life history
K1 Demographic parameters
K1 3108 Fitopatología
AB Leptoglossus occidentalis Heidemann (Hemiptera: Coreidae), known as the western conifer seed bug (WCSB), isa significant pest of the Pinus pinea L. kernel sector in the Mediterranean basin. The egg parasitoid speciesOoencyrtus obscurus (Mercet) (Hymenoptera: Encyrtidae) has been recently recorded on WCSB eggs in CentralSpain. This study defines the influence of the egg cluster size on the parasitism rate of O. obscurus, its reproductiveand demographic parameters with the goal of defining the potential of this species to be a biological controlagent. Ooencyrtus obscurus is weakly synovigenic, with the parasitism period concentrating in the first twoweeks, reaching its maximum level of intensity on the 1st day (30.2 %). The mean oviposition period was2.3 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 pseudoarrhenotokousparthenogenesis after comparing mated and unmated female offspring. Regarding demographicparameters, a single O. obscurus female was able to produce more than 3 female offspring (R0) in a generationtime (T) of 23.96 days, multiply its population 1.05 times a day (λ), and double it in 14.34 days (Td). Thecomparison between these results and those established for the main egg parasitoid of the WCSB in its nativearea could allow for decisions to be made on the type of biological control program to be applied in Europe.
PB Elsevier
SN 1049-9644
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/65223
UL https://uvadoc.uva.es/handle/10324/65223
LA eng
NO Biological Control, 2023, vol. 178, art. 105135
NO Producción Científica
DS UVaDOC
RD 08-ago-2024