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Insects 2016, 7(4), 67; doi:10.3390/insects7040067

Interactions between the Multicolored Asian Lady Beetle Harmonia axyridis and the Parasitoid Dinocampus coccinellae

Department of Agricultural Sciences, Alma Mater Studiorum University of Bologna, Viale G. Fanin 42, 40127 Bologna, Italy
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Author to whom correspondence should be addressed.
Academic Editors: Andrew G. S. Cuthbertson and Eric W. Riddick
Received: 5 August 2016 / Revised: 17 November 2016 / Accepted: 19 November 2016 / Published: 24 November 2016
(This article belongs to the Special Issue Biological Control of Invertebrate Pests)
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Abstract

Harmonia axyridis (Pallas) has been introduced either intentionally or accidentally in different areas outside its native range, where it is often regarded as invasive. Dinocampus coccinellae (Schrank) has been recorded to parasitize H. axyridis in the field, both in the native and introduced areas, Italy included. The percent of parasitism found in our field investigation was low (four percent). The effect of exposure time of H. axyridis to D. coccinellae and the impact of parasitization on host longevity, oviposition capacity and egg fertility were evaluated in the laboratory. The acceptance and suitability of H. axyridis as host for D. coccinellae were then studied, in comparison with the native coccinellid Adalia bipunctata (L.), which shares the same ecological niche. The effects of parasitization on female longevity and reproduction capacity in the exotic vs. the indigenous lady beetle were also investigated. The overall results showed that D. coccinellae negatively affected the fitness of H. axyridis, more than that of A. bipunctata. The parasitoid may thus play a marginal role in controlling the populations of the Asian lady beetle, without representing a threat to A. bipunctata. View Full-Text
Keywords: Harmonia axyridis; Dinocampus coccinellae; Adalia bipunctata; exotic insect species; native parasitoids; host-parasitoid interactions; biocontrol Harmonia axyridis; Dinocampus coccinellae; Adalia bipunctata; exotic insect species; native parasitoids; host-parasitoid interactions; biocontrol
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Dindo, M.L.; Francati, S.; Lanzoni, A.; di Vitantonio, C.; Marchetti, E.; Burgio, G.; Maini, S. Interactions between the Multicolored Asian Lady Beetle Harmonia axyridis and the Parasitoid Dinocampus coccinellae. Insects 2016, 7, 67.

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