Abstract

Arhopalus rusticus rusticus and Arhopalus syriacus (Coleoptera: Cerambycidae) are exotic forestry pests that coexist in Córdoba (Argentina). To contribute to forest management strategies, we examined how their emergence, development, and abundance affect the sex ratio. We found a dispersal sex ratio of 0.5:0.5 (males:females) in both species. The birth sex ratio was 0.5:0.5 in A. syriacus and 0.6:0.4 in A. r. rusticus. In rearing experiments, A. r. rusticus had larger individuals, with several larval instars and high survival ratio, but developmental time was shorter in A. syriacus. We found an asymmetric distribution, but there are indications that the range of A. syriacus is advancing northward.

摘要

Arhopalus rusticus rusticus和Arhopalus syriacus（鞘翅目：Cerambycidae）是在科尔多瓦（阿根廷）共存的外来林业害虫。为了促进森林管理战略，我们研究了它们的出现、发展和丰度如何影响性别比例。我们发现这两个物种的传播性别比为 0.5:0.5（雄性：雌性）。A. syriacus的出生性别比为 0.5:0.5， A . r.为 0.6:0.4 。乡下人。在饲养实验中，A. r. rusticus个体较大，幼虫龄数多，成活率高，但A. syriacus的发育时间较短。我们发现了一个不对称分布，但有迹象表明A. syriacus的分布范围正在向北推进。