A morphological, biological and molecular approach reveals four cryptic species of Trissolcus Ashmead (Hymenoptera, Scelionidae), egg parasitoids of Pentatomidae (Hemiptera)

Tortorici, Francesco; Talamas, Elijah J.; Moraglio, Silvia T.; Pansa, Marco Giuseppe; Asadi-Farfar, Maryam; Tavella, Luciana; Caleca, Virgilio

doi:10.3897/jhr.73.39052

Cited by 28 publications

(32 citation statements)

References 33 publications

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“…For the identification of Trissolcus species, the following revisions and keys were used: Talamas et al [29,30] and Tortorici et al [31]. The determination of the Telenomus individuals was performed using the classification key by Johnson [32].…”

Section: Parasitoid Identificationmentioning

confidence: 99%

Assemblage of the Egg Parasitoids of the Invasive Stink Bug Halyomorpha halys: Insights on Plant Host Associations

Zapponi

Bon

Fouani

et al. 2020

Insects

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Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) is an invasive alien species and a key agricultural pest. Its native parasitoids (Trissolcus japonicus Ashmead and Tr. mitsukurii Ashmead) have been registered in several countries where H. halys brought dramatic economic losses and where biological control is considered to be the most effective long-term solution. By searching for stink bug egg masses and exposing sentinel egg masses, we monitored the distribution of native and exotic egg parasitoids in Trentino-Alto Adige (Italy), an area where both the host and parasitoids are in expansion. We recorded ten pentatomids, seven parasitoid species, with the first report of Tr. japonicus in this area and a hyperparasitoid. In the assemblage, Anastatus bifasciatus (Geoffroy) and Tr. mitsukurii were the dominant parasitoids, with a different distribution in terms of context and host plants. Sycamore was the host plant where the highest number of naturally laid parasitized egg masses (26%) were recorded. Trissolcus mitsukurii showed the highest parasitism rate, and was often found in apple orchards. The emergence of exotic parasitoids showed a temporal delay compared to native ones. Sequence analysis of 823 bp of the CO1 mitochondrial gene revealed that the recovered Tr. japonicus and Tr. mitsukurii harbored one single haplotype each. These haplotypes were previously found in 2018 in Northern Italy. While sentinel egg masses proved to be very effective in tracking the arrival of exotic Trissolcus species, the collection of stink bug egg masses provided fundamental data on the plant host species. The results lend strong support to the adaptation of exotic Trissolcus species to the environmental conditions of the range of introduction, providing new information on plant host-associations, fundamental for the development of biological control programs.

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Section: Parasitoid Identificationmentioning

confidence: 99%

Assemblage of the Egg Parasitoids of the Invasive Stink Bug Halyomorpha halys: Insights on Plant Host Associations

Zapponi

Bon

Fouani

et al. 2020

Insects

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“…Species determinations were made with the identification tools provided in Talamas et al (2015a), Talamas et al (2017), and Tortorici et al (2019). The data associated with these specimens, including host associations, are deposited in Hymenoptera Online (hol.…”

Section: Taxonomy and Specimen Datamentioning

confidence: 99%

“…Numerous species were treated by Talamas et al (2017) as junior synonyms of T. semistriatus (Nees von Esenbeck). Tortorici et al (2019) reexamined characters previously treated as variable within T. semistriatus and further updated the classification of Palearctic Trissolcus, resurrecting T. colemani (Crawford) and T. manteroi (Kieffer) as valid species and establishing name usage for T. belenus (Walker). Although T. belenus was described in 1836, this species name was largely ignored in literature on Palearctic Trissolcus because it had not been reliably characterized.…”

Section: The T Semistriatus Complexmentioning

confidence: 99%

“…Although T. belenus was described in 1836, this species name was largely ignored in literature on Palearctic Trissolcus because it had not been reliably characterized. Tortorici et al (2019) examined the lectotype of this species, established a means of separating it from other members of the T. semistriatus complex and provided records of it parasitizing H. halys eggs in Europe. Although our analysis did not include T. manteroi, it confirms the conclusion of Tortorici et al (2019) that T. belenus, T. colemani, and T. semistriatus are distinct species.…”

Section: The T Semistriatus Complexmentioning

confidence: 99%

“…Talamas et al (2015a), following the research by Johnson (1984aJohnson ( , 1985a, updated the identification tools for species of Trissolcus in the Nearctic region. Talamas et al (2017) and Tortorici et al (2019) clarified species limits across Europe, Asia, North Africa, and the Middle East. Host data has been reviewed, updated and significantly expanded, making management decisions regarding natural enemy recruitment and rearing more efficient and accurate, much of which is summarized by Buffington et al (2018).…”

Section: Introductionmentioning

confidence: 99%

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Molecular phylogeny of Trissolcus wasps (Hymenoptera, Scelionidae) associated with Halyomorpha halys (Hemiptera, Pentatomidae)

Talamas¹,

Bon²,

Hoelmer³

et al. 2019

JHR

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As the brown marmorated stink bug (Halyomorpha halys) has spread across the Northern Hemisphere, research on its egg parasitoids has increased accordingly. These studies have included species-level taxonomy, experimental assessments of host ranges in quarantine, and surveys to assess parasitism in the field. We here present a molecular phylogeny of Trissolcus that includes all species that have been reared from live H. halys eggs. Species-group concepts are discussed and revised in the light of the phylogenetic analyses. The analyses indicate that the ability to successfully parasitize H. halys eggs is not phylogenetically constrained, but the most effective parasitoids are all found in the flavipes species group.

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Factors influencing short‐term parasitoid establishment and efficacy for the biological control of Halyomorpha halys with the samurai wasp Trissolcus japonicus

Falagiarda¹,

Carnio

Chiesa

et al. 2023

Pest Management Science

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BACKGROUND Classical biological control has been identified as the most promising approach to limit the impact of the invasive pest species Halyomorpha halys (Heteroptera: Pentatomidae). This study investigated the parasitism rate at sites where the biocontrol agent Trissolcus japonicus (Hymenoptera: Scelionidae) was released and where its unintentional introduction took place, in the Trentino–South Tyrol region. The effect of land‐use composition was studied to understand which factors favor the establishment of hosts and parasitoids, including native and exotic species. RESULTS The released T. japonicus were detected a year after the start of the program, with a significant parasitoid impact and discovery, compared to control sites. Trissolcus japonicus was the most abundant H. halys parasitoid, and Trissolcus mitsukurii and Anastatus bifasciatus were recorded also. The efficacy of T. mitsukurii was lower in sites where T. japonicus was successfully established, suggesting a possible competitive interaction. Parasitism level by T. japonicus at the release sites was 12.5% in 2020 and 16.4% in 2021. The combined effect of predation and parasitization increased H. halys mortality up to 50% at the release sites. Landscape composition analysis showed that both H. halys and T. japonicus were more likely to be found at sites with lower altitude and with permanent crops, whereas other hosts and parasitoids preferred different conditions. CONCLUSION Trissolcus japonicus showed a promising impact on H. halys, at release and adventive sites, with minor nontarget effects, mediated by landscape heterogeneity. The prevalence of T. japonicus in landscapes with permanent crops could support IPM in the future. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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A morphological, biological and molecular approach reveals four cryptic species of Trissolcus Ashmead (Hymenoptera, Scelionidae), egg parasitoids of Pentatomidae (Hemiptera)

Cited by 28 publications

References 33 publications

Assemblage of the Egg Parasitoids of the Invasive Stink Bug Halyomorpha halys: Insights on Plant Host Associations

Assemblage of the Egg Parasitoids of the Invasive Stink Bug Halyomorpha halys: Insights on Plant Host Associations

Molecular phylogeny of Trissolcus wasps (Hymenoptera, Scelionidae) associated with Halyomorpha halys (Hemiptera, Pentatomidae)

Factors influencing short‐term parasitoid establishment and efficacy for the biological control of Halyomorpha halys with the samurai wasp Trissolcus japonicus

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