Article

The chemical ecology of Harmonia axyridis

CNRS, EDB (Laboratoire Evolution et Diversité Biologique), 31062 Toulouse, France
BioControl (Impact Factor: 2.25). 08/2011; 56(4):643-661. DOI: 10.1007/s10526-011-9376-4

ABSTRACT We review the chemical ecology of the ladybird beetle Harmonia axyridis from the perspective of its invasiveness and the deleterious effects it exerts in the regions it has colonised. We outline
the nature and quantification of its chemical defence, and discuss the protection this provides against natural enemies, particularly
intraguild predators. We consider the role of infochemicals in location of prey, intraspecific communication and intraguild
interactions. We also discuss the role of prey allelochemicals in relation to H. axyridis extreme dietary generalism. Harmonia axyridis poses a number of practical problems for human health and well-being, including “ladybug taint” wine contamination and problems
resulting from large aggregations overwintering in buildings. We consider chemical insights into these issues and, in particular,
how attractants and repellents might help manage H. axyridis populations through a push–pull strategy. We conclude by discussing future perspectives for research.

KeywordsChemical defence–Coccinellidae–Foraging–Semiochemicals–Ladybug wine taint–Push–pull strategy

2 Followers
 · 
384 Views
  • Source
    Communications in agricultural and applied biological sciences 01/2014; 79(1):79-81.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The lady beetle Propylaea japonica (Thunberg) (Coleoptera: Coccinellidae) is an important predator of aphids in agroecosystems. The inundative release of coccinellid beetles can be an effective biological control strategy. An understanding of how biological control agents perceive and use stimuli from host plants is the key to successfully implement commercially produced predators. Here, we studied the relative role of visual and volatile cues. Dual-choice assays using foraging-naïve and foraging-experienced P. japonica adults were conducted using cotton plants [Gossypium hirsutum L. (Malvaceae)] with or without infestation by the cotton aphid, Aphis gossypii (Glover) (Hemiptera: Aphididae). Overall, experienced beetles were more attracted than naïve beetles toward cues associated with aphid-infested plants. Experienced beetles were also more responsive to olfactory cues compared with naïve beetles. Both foraging-naïve and -experienced lady beetles integrate olfactory and visual cues from plants infested with aphids, with an apparently greater reliance on olfactory cues. The results suggest that foraging experience may increase prey location in P. japonica.
    Entomologia Experimentalis et Applicata 03/2015; DOI:10.1111/eea.12295 · 1.71 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Native coccinellid decline has been documented worldwide. An elevated level of predation on native coccinellid eggs versus exotic coccinellid eggs has been proposed as a mechanism that may favor the reproductive success of exotic species. Recently, we determined that the native coccinellid Hippodamia convergens incurs significantly greater egg predation than the exotic Harmonia axyridis. The goal of this study was to determine if oviposition habitat or the presence of alternative prey affected the composition or contribution of egg predator guilds attacking native and exotic coccinellid eggs. Within alfalfa, grassland, and soybean habitats we identified the predator guild consuming H. convergens and H. axyridis eggs using video surveillance. We quantified the contribution of each predator to egg predation, and determined whether the abundance of aphids altered predation intensity. Our findings did not indicate that exotic coccinellids were significant predators of coccinellid eggs. However, the predator guild detected was diverse and varied across habitats. The greatest diversity and highest levels of egg predation were found within grasslands but we did not detect significant differences in the guild of predators attacking the two egg species. Thus, greater predation of H. convergens egg masses resulted from a higher proportion of eggs consumed by a shared guild, and not due to a more diverse predator pool. The majority of predators were just as likely to attack either egg species; however, we did find that in both 2010 and 2011, Formicidae maintained a consistent predation preference for H. axyridis. We found no correlation between the relative abundance of aphids and prevalence of coccinellid egg predation and herein, we discuss the implications of these findings for native coccinellid conservation and biological control.
    Biological Control 11/2013; 67(2):235-245. DOI:10.1016/j.biocontrol.2013.07.019 · 1.87 Impact Factor

Full-text

Download
463 Downloads
Available from
May 16, 2014