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Populations of african black beetle heteronychus arator coleoptera scarabaeidae in a mediterranean climate region of australia



Populations of african black beetle heteronychus arator coleoptera scarabaeidae in a mediterranean climate region of australia



Bulletin of Entomological Research 81(1): 85-92



Populations of African black beetle, Heteronychus arator (Fabricius), a subterranean pasture-dwelling pest of potatoes, were examined in patures in geographically separated potato-growing areas covering 31/2.degree. of latitude in south-western Australia. Abundance of all life stages was estimated by taking soil cores and the reproductive state of females was assessed from the stage of their ovarian development. H. arator adults emerged in later summer-early autumn (January-March), ovaries matured slowly during winter and oviposition occurred in spring (September-November). The interval between equivalent population events was about six weeks from the northernmost to the southernmost regions. Fecundity was estimated to be around 12 eggs/female and greatest natural mortality occurred late in the pre-adult development phase.

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Accession: 007668572

Download citation: RISBibTeXText

DOI: 10.1017/s000748530005327x


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