Steffan P. Hansen, J. Haran, Shelley A. Johnson, Noémie M.‐C. Hévin, Pia Addison
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Also unclear is whether these species can be controlled similarly using current control measures. The aim of this study therefore is to review the pest status of the two species over time based on museum records, field collections and historical publications, and to clarify how control measure(s) are impacted. We infer that neither species appear to be emerging pests in the region, both being of agricultural significance for at least 80 years. Phlyctinus callosus is mostly distributed along the southern coast, while P. xerophilus is distributed in inland valleys. The two species show similar biology, physiology and ecology in agro-ecosystems, and can be excluded from the host plant canopy using stem-barriers, adults being flightless. 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引用次数: 0
摘要
Phlyctinus是开普花卉区特有的象鼻虫属,由八到十个物种组成,以前被归类为单型的P. callosus sensu lato概念。该属的两个物种,Phlyctinus callosus 和 P. xerophilus,对南非西开普省的落叶水果和葡萄产业具有经济意义,在成虫阶段会造成初级损害并引起植物检疫问题。2020 年进行的分类修订令人怀疑这两个物种中是否有一个是新出现的害虫,以及/或者在物种界限明确之前的研究中考虑了哪些物种。此外,目前的控制措施是否能对这些物种进行类似的控制也不清楚。因此,本研究的目的是根据博物馆记录、野外采集和历史出版物,回顾这两个物种长期以来的虫害状况,并阐明控制措施的影响。我们推断,这两个物种似乎都不是该地区新出现的害虫,至少在 80 年前都具有重要的农业意义。Phlyctinus callosus 主要分布在南部沿海地区,而 P. xerophilus 则分布在内陆山谷。这两个物种在农业生态系统中表现出相似的生物学、生理学和生态学特征,成虫不会飞,可以利用茎屏障将其排除在寄主植物冠层之外。因此,将 P. xerophilus 命名为害虫主要是在分类学上澄清了已有的物种群。
New data on an old pest complex: The status of Phlyctinus callosus Schönherr and Phlyctinus xerophilus Haran (Coleoptera: Curculionidae) in South Africa
Phlyctinus is an endemic weevil genus of the Cape Floristic Region that comprises eight to ten species, previously classified under the monotypic P. callosus sensu lato concept. Two species of this genus, Phlyctinus callosus and P. xerophilus, are of economic concern to the deciduous fruit and grapevine industry in the Western Cape province of South Africa, causing primary damages and being of phytosanitary concern at the adult stage. The taxonomic revision conducted in 2020 raised doubts whether one of the two species was a newly emerging pest and/or what species was considered in studies before the clarification of species boundaries. Also unclear is whether these species can be controlled similarly using current control measures. The aim of this study therefore is to review the pest status of the two species over time based on museum records, field collections and historical publications, and to clarify how control measure(s) are impacted. We infer that neither species appear to be emerging pests in the region, both being of agricultural significance for at least 80 years. Phlyctinus callosus is mostly distributed along the southern coast, while P. xerophilus is distributed in inland valleys. The two species show similar biology, physiology and ecology in agro-ecosystems, and can be excluded from the host plant canopy using stem-barriers, adults being flightless. As such, it is shown that the naming of P. xerophilus as a pest is mainly a taxonomical clarification within a pre-existing species complex.
期刊介绍:
African Entomology (ISSN 1021-3589 – print / 2224-8854 – online) replaced the old Journal of the Entomological Society of Southern Africa in 1993. A single volume consisting of two issues (March and September) is published annually. The journal is indexed in all major abstracting journals
African Entomology is a peer reviewed scientific journal that publishes original research articles and short communications on all aspects of entomology, with an emphasis on the advancement of entomology on the African continent.