In southwestern Australia, outbreaks of cerambycids have been associated with infestation of drying and stressed trees. Felled timber provides an abundant habitat for a variety of subcortical beetles where their development can be modified by attack from natural enemies, including parasitoids. There are a variety of parasitoid wasps of cerambycids native to Australia, yet their effectiveness in controlling the larval performance of borers has been little studied. Approximately 700 Eucalyptus trees felled to realign a forest road provided an opportunity to determine how a mass of drying logs influences borer infestation rates and whether parasitoid wasps were effective in controlling borer survival. The native borer Coptocercus rubripes (Coleoptera: Cerambycidae) caused an extensive infestation of fallen trees at the clearfell site. These infestations were subsequently limited by the direct effect of parasitism from the native braconid wasps Callibracon limbatus and Syngaster lepidus emerging from a single hole in a white cocoon. The effects of parasitism showed inverse density dependency where high borer larval densities increased the chances of borer larval survival. The absence of parasitism in caged logs promoted high borer larval densities and greatly improved adult borer survival, and while this increased the demand for sapwood resources, it promoted early adult borer emergence. Control by native braconid wasps of high infestations of Co. rubripes borers attacking drying and stressed trees limits adult borer emergence and has the potential to partially regulate borer populations.

中文翻译：

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在澳大利亚西南部的桉树林中，长颈bore黄蜂对长角钻r幼虫性能的影响（鞘翅目：天蛾科）

在澳大利亚西南部，cerambycids的暴发与干燥和受压的树木的侵袭有关。砍伐的木材为各种皮层下的甲虫提供了丰富的栖息地，在那里它们的发育可以通过受到天敌（包括寄生虫）的攻击而改变。有多种原产于澳大利亚的cerambycids的类寄生蜂，但在控制蛀虫幼虫性能方面的功效尚未得到研究。大约700棵桉树被砍伐以重新调整林道，从而提供了一个机会来确定大量干燥的原木如何影响蛀虫的发生率以及寄生蜂是否有效控制了蛀虫的存活。本地蛀虫Coptocercus rubripes（鞘翅目：Cerambycidae）在clearfell地点造成了大量倒下的树木。随后，这些侵扰受到了来自天然茧状黄蜂黄蜂Callibracon limbatus和Syngaster lepidus从白色茧的单个孔中出现的寄生虫的直接影响所限制。寄生虫的影响表现出反比的密度依赖性，其中高bore虫幼虫密度增加了bore虫幼虫存活的机会。笼中原木的无寄生性促进了高bore虫幼虫密度并大大提高了成虫的生存率，尽管这增加了边材资源的需求，但它促进了成虫的早期出现。通过天然Braconid黄蜂控制红蓟马的大量侵染 蛀虫攻击干燥和压力大的树木会限制成虫的出现，并有可能部分调节蛀虫的数量。