In 2007 to 2008, I assessed the effects of ethanol release rate (dose) on trap catches of bark and woodboring beetles, and associated species of predators, in 6 experiments in north-central Georgia. Multiple-funnel traps were baited with ethanol alone or co-baited with α-pinene (with or without the bark beetle pheromones ipsenol and ipsdienol). The following species of bark and ambrosia beetles exhibited a positive dose-dependent response to ethanol, regardless of co-baits: Corthylus columbianus Hopkins, Dryoxylon onoharaense (Murayama), Hylastes porculus Erichson, Hylastes salebrosus Eichhoff, Hylobius pales (Herbst), Monarthrum fasciatum (Say), Orthotomicus caelatus (Eichhoff), Xyleborinus saxesenii (Ratzeburg), Xyleborus species, and Xylosandrus crassiusculus (Motschulsky) (Coleoptera: Curculionidae). Hylastes tenuis Eichhoff (Coleoptera: Curculionidae) exhibited a positive dose-dependent response to ethanol alone but not when traps were co-baited with α-pinene, or α-pinene and bark beetle pheromones. A consistent negative dose-dependent response was exhibited by Ips grandicollis (Eichhoff) whereas results with Ips avulsus (Eichhoff) and Dendroctonus terebrans (Olivier) (Coleoptera: Curculionidae) were variable. Longhorn beetles were unaffected by ethanol dose except for Curius dentatus Newman (Coleoptera: Cerambycidae), which exhibited a positive dose-dependent response to ethanol. Three species of predators exhibited positive dose-dependent responses to ethanol: Temnoscheila virescens (F.) (Coleoptera: Trogossitidae), Platysoma parallelum (Say) (Coleoptera: Histeridae), and Lasconotus species (Coleoptera: Zopheridae). Ethanol is a key kairomone for many species of bark and woodboring beetles.

Keywords: ambrosia beetle; bark beetle; ethanol; host selection; kairomone.

Published by Oxford University Press on behalf of Entomological Society of America 2025.

在2007年至2008年期间，我在乔治亚州中部地区进行了6项实验，评估了乙醇释放速率（剂量）对树皮甲虫和木材蛀食甲虫及其相关捕食者诱捕效果的影响。多重漏斗陷阱中使用单独的乙醇或与α-蒎烯一起使用（有时还伴有 Ips 类型甲虫的信息素 ipsenol 和 ipsdienol）。以下树皮甲虫和拟谷盗科种类对乙醇表现出剂量依赖性的正向响应，无论是否有共诱饵：Corthylus columbianus Hopkins、Dryoxylon onoharaense (Murayama)、Hylastes porculus Erichson、Hylastes salebrosus Eichhoff、Hylobius pales (Herbst)、Monarthrum fasciatum (Say)、Orthotomicus caelatus (Eichhoff)、Xyleborinus saxesenii (Ratzeburg)、Xyleborus 种类和 Xylosandrus crassiusculus (Motschulsky)（鞘翅目：拟谷盗科）。Hylastes tenuis Eichhoff（鞘翅目：拟谷盗科）对单独的乙醇表现出剂量依赖性的正向响应，但在与α-蒎烯一起使用或与α-蒎烯和树皮甲虫信息素共诱饵时则没有这种现象。Ips grandicollis (Eichhoff) 始终表现出剂量依赖性的负向响应，而 Ips avulsus (Eichhoff) 和 Dendroctonus terebrans (Olivier)（鞘翅目：拟谷盗科）的结果变化不定。除了 Curius dentatus Newman（长蠹科）显示出对乙醇的剂量依赖性正向响应外，长角甲虫不受乙醇剂量的影响。三种捕食者种类表现出对乙醇的剂量依赖性的正向响应：Temnoscheila virescens (F.) （隐翅虫科）、Platysoma parallelum (Say)（隐翅虫科）和 Lasconotus 种类（鞘翅目：Zopheridae）。乙醇是许多种类树皮甲虫和木材蛀食甲虫的关键信息素。

关键词：
拟谷盗；树皮甲虫；乙醇；寄主选择；信息素。

由牛津大学出版社代表昆虫学会于2025年出版。