Effect of Volatile Organic Compounds from Branches of Healthy and Unhealthy <i>Araucaria araucana</i> (Molina) K. Koch Trees on Host Selection by Bark Beetle <i>Sinophloeus porteri</i> (Coleoptera: Curculionidae)
<i>Araucaria araucana</i> is one of the longest-living Chilean trees. Recently, Araucaria Leaf Damage disease, which causes damage to branches and crowns, was detected. <i>Sinophloeus porteri</i>, a bark beetle affecting <i>A. araucana</i>, could be associated wit...
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2025-07-01
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| author | Washington Aniñir Leonardo Bardehle Cristian Montalva Andrés Quiroz Javier Espinoza |
| author_facet | Washington Aniñir Leonardo Bardehle Cristian Montalva Andrés Quiroz Javier Espinoza |
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| description | <i>Araucaria araucana</i> is one of the longest-living Chilean trees. Recently, Araucaria Leaf Damage disease, which causes damage to branches and crowns, was detected. <i>Sinophloeus porteri</i>, a bark beetle affecting <i>A. araucana</i>, could be associated with foliar damage. However, little is known about their ecological and chemical interactions. This study examined the olfactory response of <i>S. porteri</i> to volatiles emitted from <i>A. araucana</i>. Branches and weevils were collected from a national park, and volatiles were trapped from both healthy and unhealthy branches. Thirty terpenes were identified, some of which were reported for the first time in <i>A. araucana</i>. Healthy branches emitted large amounts of myrcene (>360 ng g<sup>−1</sup> day<sup>−1</sup>), and unhealthy branches showed high hibaene emanations (>140 ng g<sup>−1</sup> day<sup>−1</sup>). Olfactory assays verified that <i>S. porteri</i> was attracted to the volatile blends of branches, regardless of the health condition of the branches, but preferred the blend of unhealthy branches. Moreover, myrcene was repellent to these weevils, and hibaene acted as an attractant, suggesting that <i>A. araucana</i> might use myrcene for defense against <i>S. porteri</i>, and hibaene could stimulate host selection by beetles. |
| format | Article |
| id | doaj-art-4382bb55cf834bf8a41f8e20575ca899 |
| institution | DOAJ |
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| publishDate | 2025-07-01 |
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| series | Insects |
| spelling | doaj-art-4382bb55cf834bf8a41f8e20575ca8992025-08-20T03:08:09ZengMDPI AGInsects2075-44502025-07-0116771210.3390/insects16070712Effect of Volatile Organic Compounds from Branches of Healthy and Unhealthy <i>Araucaria araucana</i> (Molina) K. Koch Trees on Host Selection by Bark Beetle <i>Sinophloeus porteri</i> (Coleoptera: Curculionidae)Washington Aniñir0Leonardo Bardehle1Cristian Montalva2Andrés Quiroz3Javier Espinoza4Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco 4811230, ChileDepartamento de Producción Agropecuaria, Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco 4811230, ChileLaboratorio de Salud de Bosques, Instituto de Conservación, Biodiversidad y Territorio, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Valdivia 5090000, ChileLaboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco 4811230, ChileLaboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco 4811230, Chile<i>Araucaria araucana</i> is one of the longest-living Chilean trees. Recently, Araucaria Leaf Damage disease, which causes damage to branches and crowns, was detected. <i>Sinophloeus porteri</i>, a bark beetle affecting <i>A. araucana</i>, could be associated with foliar damage. However, little is known about their ecological and chemical interactions. This study examined the olfactory response of <i>S. porteri</i> to volatiles emitted from <i>A. araucana</i>. Branches and weevils were collected from a national park, and volatiles were trapped from both healthy and unhealthy branches. Thirty terpenes were identified, some of which were reported for the first time in <i>A. araucana</i>. Healthy branches emitted large amounts of myrcene (>360 ng g<sup>−1</sup> day<sup>−1</sup>), and unhealthy branches showed high hibaene emanations (>140 ng g<sup>−1</sup> day<sup>−1</sup>). Olfactory assays verified that <i>S. porteri</i> was attracted to the volatile blends of branches, regardless of the health condition of the branches, but preferred the blend of unhealthy branches. Moreover, myrcene was repellent to these weevils, and hibaene acted as an attractant, suggesting that <i>A. araucana</i> might use myrcene for defense against <i>S. porteri</i>, and hibaene could stimulate host selection by beetles.https://www.mdpi.com/2075-4450/16/7/712<i>Araucaria araucana</i><i>Sinophloeus porteri</i>volatile organic compounds (VOCs)olfactometry |
| spellingShingle | Washington Aniñir Leonardo Bardehle Cristian Montalva Andrés Quiroz Javier Espinoza Effect of Volatile Organic Compounds from Branches of Healthy and Unhealthy <i>Araucaria araucana</i> (Molina) K. Koch Trees on Host Selection by Bark Beetle <i>Sinophloeus porteri</i> (Coleoptera: Curculionidae) Insects <i>Araucaria araucana</i> <i>Sinophloeus porteri</i> volatile organic compounds (VOCs) olfactometry |
| title | Effect of Volatile Organic Compounds from Branches of Healthy and Unhealthy <i>Araucaria araucana</i> (Molina) K. Koch Trees on Host Selection by Bark Beetle <i>Sinophloeus porteri</i> (Coleoptera: Curculionidae) |
| title_full | Effect of Volatile Organic Compounds from Branches of Healthy and Unhealthy <i>Araucaria araucana</i> (Molina) K. Koch Trees on Host Selection by Bark Beetle <i>Sinophloeus porteri</i> (Coleoptera: Curculionidae) |
| title_fullStr | Effect of Volatile Organic Compounds from Branches of Healthy and Unhealthy <i>Araucaria araucana</i> (Molina) K. Koch Trees on Host Selection by Bark Beetle <i>Sinophloeus porteri</i> (Coleoptera: Curculionidae) |
| title_full_unstemmed | Effect of Volatile Organic Compounds from Branches of Healthy and Unhealthy <i>Araucaria araucana</i> (Molina) K. Koch Trees on Host Selection by Bark Beetle <i>Sinophloeus porteri</i> (Coleoptera: Curculionidae) |
| title_short | Effect of Volatile Organic Compounds from Branches of Healthy and Unhealthy <i>Araucaria araucana</i> (Molina) K. Koch Trees on Host Selection by Bark Beetle <i>Sinophloeus porteri</i> (Coleoptera: Curculionidae) |
| title_sort | effect of volatile organic compounds from branches of healthy and unhealthy i araucaria araucana i molina k koch trees on host selection by bark beetle i sinophloeus porteri i coleoptera curculionidae |
| topic | <i>Araucaria araucana</i> <i>Sinophloeus porteri</i> volatile organic compounds (VOCs) olfactometry |
| url | https://www.mdpi.com/2075-4450/16/7/712 |
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