Aniñir Washington, Bardehle Leonardo, Montalva Cristian, Quiroz Andrés, Espinoza Javier
Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco 4811230, Chile.
Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco 4811230, Chile.
Insects. 2025 Jul 10;16(7):712. doi: 10.3390/insects16070712.
is one of the longest-living Chilean trees. Recently, Araucaria Leaf Damage disease, which causes damage to branches and crowns, was detected. , a bark beetle affecting , could be associated with foliar damage. However, little is known about their ecological and chemical interactions. This study examined the olfactory response of to volatiles emitted from . 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 . Healthy branches emitted large amounts of myrcene (>360 ng g day), and unhealthy branches showed high hibaene emanations (>140 ng g day). Olfactory assays verified that 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 might use myrcene for defense against , and hibaene could stimulate host selection by beetles.
是智利寿命最长的树木之一。最近，检测到了导致树枝和树冠受损的南洋杉叶损伤病。 ，一种影响 的树皮甲虫，可能与叶片损伤有关。然而，它们的生态和化学相互作用却鲜为人知。本研究检测了 对 释放的挥发物的嗅觉反应。树枝和象鼻虫均采自一个国家公园，挥发物则从健康和不健康的树枝中捕获。鉴定出了30种萜类化合物，其中一些是在 中首次报道的。健康树枝释放出大量的月桂烯（>360 ng g 天），不健康树枝则显示出高含量的日桧烯释放（>140 ng g 天）。嗅觉试验证实， 被树枝的挥发物混合物所吸引，无论树枝的健康状况如何，但更喜欢不健康树枝释放的混合物。此外，月桂烯对这些象鼻虫有驱避作用，而日桧烯则起到引诱剂的作用，这表明 可能利用月桂烯来抵御 ，而日桧烯可能刺激甲虫进行寄主选择。
