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Field effects of oxygenated monoterpenes and estragole combined with pheromone on attraction of Ips typographus and its natural enemies
Czech Univ Life Sci Prague, Czech Republic.
Czech Univ Life Sci Prague, Czech Republic;Slovak Acad Sci, Slovakia.
Czech Univ Life Sci Prague, Czech Republic.
Linnaeus University, Faculty of Health and Life Sciences, Department of Chemistry and Biomedical Sciences.ORCID iD: 0000-0001-7158-6393
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2023 (English)In: Frontiers in Forests and Global Change, E-ISSN 2624-893X, Vol. 6, article id 1292581Article in journal (Refereed) Published
Abstract [en]

Introduction: Central European Norway spruce monocultures face Ips typographus outbreaks due to decreasing resistance. These beetles use volatile compounds to communicate and select suitable host trees. Spruce trees, beetles, and their symbiotic ophiostomatoid fungi emit oxygenated monoterpenes, including 1,8-cineole, alpha-terpineol, camphor, carvone, terpinen-4-ol, isopinocamphone, and pinocamphone, and the phenylpropanoid estragole, particularly in the infestation phase. These compounds trigger strong responses in I. typographus antennae, motivating our field study.Objective: This study aimed to assess how adding these compounds to the aggregation pheromone of Ips typographus modulates the attraction of this bark beetle and its natural enemies.Methods: In combination with I. typographus pheromone, estragole, 1,8-cineole, (+/-)-camphor, (-)-carvone, alpha-terpineol, (-)-terpinen-4-ol, (+)-pinocamphone, and (+)-isopinocamphone at low, medium, and high doses were tested in pheromone traps at two sites in the Czech Republic.Results: All 1,8-cineole doses and the high estragole dose acted as anti-attractants for I. typographus, whereas all (+)-isopinocamphone doses enhanced their attraction to pheromone. Catches of natural enemies, the Staphylinidae and Pteromalidae, varied by location.Conclusion: 1,8-cineole, isopinocamphone, and estragole may play vital roles in tritrophic interactions among spruce trees, and I. typographus and its natural enemies, and these compounds may be developed into new or enhanced semiochemical-based pest control methods.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2023. Vol. 6, article id 1292581
Keywords [en]
Eurasian spruce bark beetle, host compounds, Pteromalidae, Staphylinidae, Norway spruce, Picea abies, spruce kairomone, pheromone traps
National Category
Organic Chemistry Ecology
Research subject
Natural Science, Ecological chemistry
Identifiers
URN: urn:nbn:se:lnu:diva-126937DOI: 10.3389/ffgc.2023.1292581ISI: 001135811900001Scopus ID: 2-s2.0-85181458513OAI: oai:DiVA.org:lnu-126937DiVA, id: diva2:1829462
Available from: 2024-01-19 Created: 2024-01-19 Last updated: 2024-02-15Bibliographically approved

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Unelius, C. Rikard

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