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Short Note

An adult Leptoglossus occidentalis (Heteroptera: Coreidae) parasitized in Portugal by the native Tachinid fly Elomya lateralis (Diptera: Tachinidae)

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Pages 287-291 | Accepted 11 Jul 2022, Published online: 08 Aug 2022
 

Abstract

Native to North America, the western conifer seed bug (WCSB), Leptoglossus occidentalis Heidemann, 1910 (Heteroptera: Coreidae), has been accidentally introduced into Europe, Africa, South America, and Eastern Asia, where it causes damage to pine seeds. Despite its economic importance, control methods are limited and inefficient, with biological control considered a promising strategy to limit its populations. Nevertheless, there is a surprising lack of information on the natural enemies of the WCSB in its invaded range. In this paper we report a new natural enemy found parasitizing an adult of L. occidentalis in Portugal, identified as Elomya lateralis (Meigen, 1824) (Diptera: Tachinidae) by morphological and molecular analysis. To our knowledge, this is the first time E. lateralis is reported parasitizing L. occidentalis. Future studies should evaluate if this is an isolated occurrence, or if E. lateralis will consolidate as a natural enemy of this exotic pest in Europe.

Résumé

Un adulte de Leptoglossus occidentalis (Heteroptera : Coreidae) parasité au Portugal par le tachinide indigène Elomya lateralis (Diptera : Tachinidae). Originaire de l’ouest de l’Amérique du Nord, la punaise des graines de conifères, Leptoglossus occidentalis Heidemann, 1910 (Heteroptera : Coreidae), a été accidentellement introduite en Europe, en Afrique, et Amérique du Sud et en Asie orientale, où elle cause des dégâts aux graines de pins. En dépit de son importance économique, les méthodes de contrôle restent limitées et inefficaces, la lutte biologique étant cependant considérée comme une stratégie prometteuse pour réguler ses populations. Néanmoins, il y a un manque surprenant d'informations sur les ennemis naturels de la punaise dans l’aire d’invasion. Dans cet article, nous rapportons un nouvel ennemi naturel trouvé parasitant l'adulte de L. occidentalis au Portugal, qui a été identifié par analyse morphologique et moléculaire comme Elomya lateralis (Meigen, 1824) (Diptera : Tachinidae). À notre connaissance, c'est la première fois qu'E. lateralis est signalé parasitant cette punaise. Des études futures devraient évaluer s'il s'agit d'une occurrence isolée ou si E. lateralis pourra réellement être considéré comme ennemi naturel de ce ravageur exotique en Europe.

Acknowledgements

We would like to thank the landowners of Herdade de Marvila SA (Ponte de Sôr) for allowing the collection of the insects on their Estate.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

Funding was provided by the Operational Group “Gestão integrada de agentes bióticos associados à perda de produção do pinhão PINHÃO, PDR2020-101-031185”, and by Fundação para a Ciência e a Tecnologia (Portugal) through the R&D Unit UIDB/04551/2020 GREEN-IT - Bioresources for Sustainability.

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