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An Insight into the Role of Trissolcus mitsukurii as Biological Control Agent of Halyomorpha halys in Northeastern Italy

1
Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, viale dell’Università 16, 35020 Legnaro, Italy
2
Laimburg Research Centre, Laimburg 6, Pfatten (Vadena), IT-39040 Auer (Ora), South Tyrol, Italy
3
Dipartimento di Scienze Agrarie, Forestali e Alimentari, University of Torino, largo P. Braccini 2, 10095 Grugliasco, Italy
4
Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, via delle Scienze 206, 33100 Udine, Italy
*
Authors to whom correspondence should be addressed.
Insects 2020, 11(5), 306; https://doi.org/10.3390/insects11050306
Received: 30 March 2020 / Revised: 22 April 2020 / Accepted: 11 May 2020 / Published: 14 May 2020
Sustainable strategies such as classical or augmentative biological control are currently being evaluated for the long-term management of the alien invasive pest Halyomorpha halys (Stål) (Hemiptera: Pentatomidae). A three-year study carried out in northeastern Italy was performed to investigate the distribution and field performance of the H. halys egg parasitoid Trissolcus mitsukurii (Ashmead) (Hymenoptera: Scelionidae), in comparison with other parasitoid species. In the study area, adventive populations of T. mitsukurii were present since 2016, representing the earliest detection of this species in Europe. Trissolcus mitsukurii was the most abundant parasitoid and showed a higher “parasitoid impact” (i.e., number of parasitized eggs over the total number of field-collected eggs) compared to the other species, i.e., Anastatus bifasciatus (Geoffroy) (Hymenoptera: Eupelmidae), Trissolcus basalis (Wollaston) and Trissolcus kozlovi Rjachovskij (Hymenoptera: Scelionidae). The hyperparasitoid Acroclisoides sinicus (Huang and Liao) (Hymenoptera: Pteromalidae) was also recorded. Phylogenetic analysis of T. mitsukurii population distinguished two clades, one covering samples from Italy, Japan and China, the other from South Korea. The present study provides promising results for the biological control of a pest that is having a dramatic impact on a wide range of crops worldwide. View Full-Text
Keywords: biological control; egg parasitoid; Trissolcus mitsukurii; Pentatomidae; Scelionidae; brown marmorated stink bug biological control; egg parasitoid; Trissolcus mitsukurii; Pentatomidae; Scelionidae; brown marmorated stink bug
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MDPI and ACS Style

Scaccini, D.; Falagiarda, M.; Tortorici, F.; Martinez-Sañudo, I.; Tirello, P.; Reyes-Domínguez, Y.; Gallmetzer, A.; Tavella, L.; Zandigiacomo, P.; Duso, C.; Pozzebon, A. An Insight into the Role of Trissolcus mitsukurii as Biological Control Agent of Halyomorpha halys in Northeastern Italy. Insects 2020, 11, 306.

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