Key to Nearctic species of Trissolcus Ashmead (Hymenoptera, Scelionidae), natural enemies of native and invasive stink bugs (Hemiptera, Pentatomidae)

Talamas, Elijah J.; Johnson, Norman F.; Buffington, Matthew L.

doi:10.3897/jhr.43.8560

Cited by 88 publications

(80 citation statements)

References 33 publications

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“…(Figures 4,6,58,99,118,128) epc epomial carina (Figures 5,225) eps episternal foveae (Figures 5,6,37,50,74,105,154,170,202) ff felt field ( Figure 6) fs facial striae (Figures 37,75,76,193 The number of setae on the clypeus is at times a challenging character to observe, but it is very useful for delimiting the flavipes group and separating similar species within it. Consistent with Talamas et al (2015a), species in the flavipes group have 4 or fewer clypeal setae, and those in the thyantae group have 6. We find that the number of clypeal setae in the basalis group is almost always 6, but we encountered a small number of specimens of T. comperei with 8 clypeal setae.…”

Section: Methodssupporting

confidence: 51%

“…Multiple species in the flavipes group from the Palearctic region do not comply with the characters in the key to species of Nearctic Trissolcus by Talamas et al (2015a). The notaulus may be very weakly indicated and present only at the posterior margin of the mesoscutum, as in T. gonopsidis, and the hyperoccipital carina in T. eriventus may be unrecognizable.…”

Section: Flavipes Species Groupmentioning

confidence: 99%

“…The characters presented in Talamas et al (2015a) will separate most, but not all, species of Palearctic Trissolcus from Telenomus. A four-merous clava is found in T. hyalinipennis and T. oobius, compounded by as many as 6 clavomeres that can be found in Telenomus.…”

Section: Generic Diagnosis Of Holarctic Trissolcusmentioning

confidence: 99%

“…Recent work in this genus (Talamas et al 2015a) provided identification tools to separate these species from the Nearctic fauna. This work followed relatively recent revisions of Nearctic Trissolcus (Johnson 1984a(Johnson , 1985a that made production of these tools a straightforward task.…”

Section: Introductionmentioning

confidence: 99%

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Revision of Palearctic Trissolcus Ashmead (Hymenoptera, Scelionidae)

Talamas¹,

Buffington²,

Hoelmer³

2017

JHR

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Species of Trissolcus Ashmead are potent natural enemies of stink bugs (Pentatomidae). Research on biological agents to control the brown marmorated stink bug, Halyomorpha halys (Stål) (BMSB), in Western Europe requires reliable taxonomic resources for identification of Trissolcus wasps. To aid this research endeavor, we present a species identification key to females of Palearctic Trissolcus. Morphological characters and concepts of the genus and species groups are discussed. We discovered a number of nomenclatural and identification issues that we here rectify.

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Section: Methodssupporting

confidence: 51%

Section: Flavipes Species Groupmentioning

confidence: 99%

Section: Generic Diagnosis Of Holarctic Trissolcusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Revision of Palearctic Trissolcus Ashmead (Hymenoptera, Scelionidae)

Talamas¹,

Buffington²,

Hoelmer³

2017

JHR

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“…From the remaining eggs, four different parasitoid species were reared, all belonging to the family Platygastridae: T. cultratus Mayr (syn. T. flavipes (Talamas et al 2015), T. semistriatus (Nees), T. scutellaris (Thomson) and T. chloropus (Thomson). T. semistriatus and T. chloropus were most frequently reared from five and four different hosts, respectively.…”

Section: Parasitism Of Sentinel Egg Massesmentioning

confidence: 99%

Can native egg parasitoids adopt the invasive brown marmorated stink bug, Halyomorpha halys (Heteroptera: Pentatomidae), in Europe?

et al. 2015

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Halyomorpha halys was accidentally introduced into Switzerland around 2004 and has recently spread to several additional areas in Europe, with established populations documented in France, Italy, Greece and Hungary. To test whether generalist egg parasitoids of European Pentatomidae have the potential to control H. halys, and whether these could be as effective as their related Asian species, sentinel egg masses of H. halys and six native European pentatomids were exposed in two regions of Switzerland. Freeze-killed sentinel egg masses of H. halys were attacked by the platygastrid Trissolcus cultratus and the eupelmid Anastatus bifasciatus, whereas fresh egg masses of native Pentatomidae occassionally yielded four Scelionidae species: Trissolcus semistriatus, T. scutellaris, T. cultratus and Telenomus chloropus. In no-choice tests, T. chloropus and T. semistratus produced no offspring from fresh H. halys eggs, whereas T. cultratus and T. scutellaris were sporadically able to complete development. Stopping embryogenesis by freezing egg masses of H. halys at -80°C enabled T. cultratus and T. semistriatus to produce a high number of offspring without influencing the behaviour of the parasitoids. In contrast to European platygastrids, the Asian parasitoids Trissolcus japonicus and T. cultratus (Chinese strain) caused significantly higher parasitism of fresh H. halys eggs. Differences in developmental success may be related to less efficient venom of European scelionids injected during oviposition. To date, A. bifasciatus is the only potential candidate for augmentaive biological control of H. halys in Europe as it was the only European parasitoid capable of consistent, successful development on fresh H. halys eggs.

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An exotic parasitoid provides an invasional lifeline for native parasitoids

Konopka

Haye

Gariépy

et al. 2016

Ecology and Evolution

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The introduction of an exotic species may alter food webs within the ecosystem and significantly affect the biodiversity of indigenous species at different trophic levels. It has been postulated that recent introduction of the brown marmorated stinkbug (Halyomorpha halys (Stål)) represents an evolutionary trap for native parasitoids, as they accept H. halys egg masses as a host but produce no viable progeny. Interspecific interactions between European egg parasitoid, Trissolcus cultratus (Mayr), and an Asian parasitoid, Trissolcus japonicus (Ashmead), were assessed by providing egg masses to T. cultratus at various time intervals following the initial parasitization by T. japonicus. The suitability of the host for the parasitoid development was re‐assessed by providing T. cultratus with fresh and frozen egg masses of various ages. The likelihood of T. cultratus being able to attack previously parasitized egg masses was determined by assessing the duration of egg mass guarding behavior by T. japonicus following parasitization. The results of experiments examining the interspecific interactions between a native European egg parasitoid, T. cultratus, and an Asian parasitoid, T. japonicus (a candidate for the biological control of H. halys), showed that the native species can act as facultative hyperparasitoid of the exotic one. Although this is only possible during certain stages of T. japonicus development, the presence of the introduced parasitoid may reduce the impact of the evolutionary trap for indigenous parasitoid species. There is a possibility that the occurrence of facultative hyperparasitism between scelionid parasitoids associated with stinkbugs is common. This resulting intraguild predation could promote conservation and stabilization of natural communities by impacting the diversity and population dynamics of native stinkbugs and their parasitoids (e.g., by allowing native parasitoids to avoid wasting reproductive effort on unsuitable hosts), or reduce success of biological control programs (e.g., by reducing the population size of the exotic parasitoids).

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Key to Nearctic species of Trissolcus Ashmead (Hymenoptera, Scelionidae), natural enemies of native and invasive stink bugs (Hemiptera, Pentatomidae)

Cited by 88 publications

References 33 publications

Revision of Palearctic Trissolcus Ashmead (Hymenoptera, Scelionidae)

Revision of Palearctic Trissolcus Ashmead (Hymenoptera, Scelionidae)

Can native egg parasitoids adopt the invasive brown marmorated stink bug, Halyomorpha halys (Heteroptera: Pentatomidae), in Europe?

An exotic parasitoid provides an invasional lifeline for native parasitoids

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