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Impact of early insect herbivory on the invasive oak lace bug (Corythucha arcuata Say, 1832) in different oak species

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Abstract

Insect herbivores co-occurring on the same host plant interact in various ways. In particular, early-season insect herbivory triggers a wide range of plant responses that can determine the performance of herbivores colonizing the plant later in the course of the season. But the strength and direction of such effects are debated, and virtually unknown in the case of novel interactions involving exotic insects in their introduction range. We conducted an observational field study in SW France, a region recently invaded by the Oak Lace Bug (OLB, Corythucha arcuata Say). We measured early chewing damage and subsequent OLB damage in four oak species (Quercus robur, Q. pubescens, Q. cerris and Q. ilex). We set up a complementary non-choice experiment in the laboratory, feeding OLB with leaves with or without prior herbivory. The four oak species differed in their sensitivity to OLB damage, Q. ilex being broadly resistant. Prior herbivory promoted OLB damage in the laboratory experiment, but not in the field. However, prior herbivory did not alter the rank of oak resistance to the OLB. Our results suggest possible synergistic effects between spring defoliators and the OLB. This study brings insight into herbivore-herbivore interactions and their possible implications for forest management.

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Data availability

The datasets generated during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors warmly thank Cloée Jean and Timothé Lajubertie for their technical assistance in the field and in the laboratory. M.G. did this study through the research core group “Forest biology, ecology and technology” (P4-0107) financed via the Slovenian Research Agency.

Funding

This research was supported by Gozdarski Inštitut Slovenije (P4-0107).

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Authors

Contributions

EVC, BC, MG, LS and AS contributed to the study conception and design. Material preparation and data collection were performed by EVC, LS, OB and YM. EVC estimated early chewing damage and OLB damage, while EVC, OB and YM measured the OLB abundance and OLB egg clutches abundance. Data analysis was performed by EVC and BC. The first draft of the manuscript was written by EVC and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Elena Valdés-Correcher.

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Valdés-Correcher, E., de Groot, M., Schillé, L. et al. Impact of early insect herbivory on the invasive oak lace bug (Corythucha arcuata Say, 1832) in different oak species. Arthropod-Plant Interactions 17, 363–371 (2023). https://doi.org/10.1007/s11829-023-09967-8

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  • DOI: https://doi.org/10.1007/s11829-023-09967-8

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