Intraguild predation on the aphid parasitoid Aphelinus asychis by the ladybird Harmonia axyridis

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• 作者：Wenyan Fu ; Xinglin Yu ; Nazeer Ahmed ; Shize Zhang ; Tongxian Liu
• 关键词：Coleoptera ; Coccinellidae ; Hymenoptera ; Aphelinidae ; Feeding experience ; Prey quality
• 刊名：BioControl
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：62
• 期：1
• 页码：61-70
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Entomology; Plant Pathology; Agriculture; Animal Ecology; Animal Biochemistry; Behavioral Sciences;
• 出版者：Springer Netherlands
• ISSN：1573-8248
• 卷排序：62

文摘

We investigated intraguild predation (IGP) on an aphid parasitoid, Aphelinus asychis Walker (Hymenoptera: Aphelinidae), by the multicolored Asian ladybird, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), and used the green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae) as the prey/host in the laboratory. The ladybirds reared on artificial diet and on aphids consumed more aphids than mummies, while those reared on parasitized aphids consumed similar numbers of aphids and mummies. The ladybirds chose more mummies in treatments when mummies were more abundant, and more aphids when numbers of aphids and mummies were equal, or when aphids were more abundant. However, at all density treatments, rejection rates of mummies (36%) were much greater than of aphids (2%). H. axyridis prey on more aphids than A. asychis mummies, which enhances biological control by the two species. However, prior feeding experience affected subsequent choice, increasing the competition between natural enemies which would reduce their combined effectiveness for biological control.