Occurrence, Density, and Distribution of Parasitic Fungus &lt;I&gt;Hesperomyces virescens&lt;/I&gt; (Laboulbeniales: Laboulbeniaceae) on Multicolored Asian Lady Beetle (Coleoptera: Coccinellidae)

Riddick, Eric W.; Schaefer, Paul W.

doi:10.1603/0013-8746(2005)098[0615:odadop]2.0.co;2

Cited by 50 publications

(48 citation statements)

References 25 publications

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“…The association between H. axyridis and H. virescens was first reported in Ohio (USA) in 2002 (Garcés & Williams, 2004) and subsequently at many localities in eastern and central United States, with the percentage parasitization often reaching 70-100% (Riddick & Schaefer, 2005;Harwood et al, 2006a, b;Riddick, 2006Riddick, , 2010Nalepa & Weir, 2007;Riddick & Cottrell, 2010).…”

Section: Introductionmentioning

confidence: 98%

Harmonia axyridis (Coleoptera: Coccinellidae) as a host of the parasitic fungus Hesperomyces virescens (Ascomycota: Laboulbeniales, Laboulbeniaceae): A case report and short review

Ceryngier¹,

Twardowska²

2013

Eur. J. Entomol.

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Abstract.Hesperomyces virescens is an ectoparasite of some Coccinellidae, which until the mid-1990s was relatively rarely only reported from warm regions in various parts of the world. Analysis of the host and distribution data of H. virescens recorded in the Western Palaearctic and North America reveals several trends in the occurrence and abundance of H. virescens: (1) it has recently been much more frequently recorded, (2) most of the recent records are for more northerly (colder) localities than the early records and (3) the recent records are mostly of a novel host, the invasive harlequin ladybird (Harmonia axyridis). While in North America H. virescens is almost exclusively found on H. axyridis, all European records of this association are very recent and still less numerous than records of Adalia bipunctata as a host. However, based on a relatively few published cases of the H. axyridis-H. virescens association in Europe and the case described in this paper, it is clear that the harlequin ladybird is currently the main host of this parasite. These changes in the abundance and geographical distribution of H. virescens are probably linked to some features of H. axyridis, such as its abundance, multivoltinism with overlapping generations, high level of promiscuity and overwintering in mass aggregations. The occurrence of these features in one species may make it especially suitable for H. virescens and other parasites that require close contact of host individuals for efficient transmission. Indeed, some of the data indicate that parasites other than H. virescens, like the podapolipid mite Coccipolipus hippodamiae and allantonematid nematodes of the genus Parasitylenchus may also heavily parasitize H. axyridis. We hypothesize that the acquisition of H. axyridis as a host by H. virescens, C. hippodamiae and Parasitylenchus spp. may have further consequences for the abundance and distribution of these parasites, including the expansion of their ranges to other continents colonized by invasive populations of this ladybird and areas in Asia where H. axyridis is native.

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Section: Introductionmentioning

confidence: 98%

Harmonia axyridis (Coleoptera: Coccinellidae) as a host of the parasitic fungus Hesperomyces virescens (Ascomycota: Laboulbeniales, Laboulbeniaceae): A case report and short review

Ceryngier¹,

Twardowska²

2013

Eur. J. Entomol.

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“…The braconid Dinocampus (= Perilitus ) coccinellae (Schrank) parasitized MALB in Korea and North America. A parasitic fungus specifi c to Coccinellidae was found infecting MALB in Pennsylvania, with infection levels >50% (Riddick and Schaefer 2005 ) . Nalepa et al ( 1996 ) reported overwintering adults to be parasitized by the tachinid S. triangulifera at levels of 14.2% and 1.4%, respectively in 1993 and 1994.…”

Section: Chemical Controlmentioning

confidence: 99%

Threatening the Harvest: The Threat from Three Invasive Insects in Late Season Vineyards

Pfeiffer

Leskey

Burrack

2012

Arthropod Management in Vineyards:

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“…Hesperomyces virescens has been reported infecting these coccinellids: Chilocorus stigma Thaxter, C. bipustulatus) (Applebaum et al, 1971;Kamburov et al, 1967) This fungus is often reported on the ventroposterior of males and the dorsoposterior of females; a sexual dimorphism that reflects the major transmission mechanism which is thought to be direct contact during mating (Weir & Beakes, 1996;Welch et al, 2001;Riddick & Schaefer, 2005). However, recent studies demonstrated that the distribution of H. virescens thalli on aggregating beetles are not explained by sexual transmission (Riddick & Schaefer, 2005;Riddick, 2006;Nalepa & Weir, 2007).…”

Section: Studies On Natural Populationsmentioning

confidence: 99%

“…However, recent studies demonstrated that the distribution of H. virescens thalli on aggregating beetles are not explained by sexual transmission (Riddick & Schaefer, 2005;Riddick, 2006;Nalepa & Weir, 2007). Nalepa & Weir (2007) observed that overwintering H. axyridis did not exhibit the characteristic elytral distribution of H. virescens as hypothesised by the sexual transmission theory.…”

Section: Studies On Natural Populationsmentioning

confidence: 99%

Forgotten natural enemies: Interactions between coccinellids and insect-parasitic fungi

Roy¹,

Cottrell²

2008

Eur. J. Entomol.

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Abstract. The role of predators and parasitoids in the regulation of insect populations is widely reported in the context of both pest and non-pest insects. However, this is not the case for pathogens (entomopathogens). Indeed, most studies on insect life history refer only to predators and parasitoids when considering natural enemy guilds, even though naturally occurring entomopathogens are undoubtedly more diverse and widespread. This is certainly the case with the Coccinellidae; the natural enemies of coccinellids have been the subject of a number of review articles but pathogens receive only brief mention. In this review we attempt to address the balance and consider the interactions of natural populations of Coccinellidae with entomopathogenic fungi. Most research on entomopathogens and Coccinellidae focuses on the non-target impact of biorational insecticides against coccinellids and the impact of fungal infections upon aggregations of overwintering coccinellids; with the former overwhelmingly dominating the literature. Given the prominence of coccinellids in classical and conservation biological control, it is surprising that studies have not measured the natural impact of pathogenic fungi upon introduced species or natural populations of Coccinellidae, as has been done with numerous insect pest species. Here we review the literature on the intriguing interactions between coccinellids and fungal pathogens. We examine the literature on direct infection (sub-lethal and lethal) of coccinellids by pathogenic (Beauveria bassiana, Metarhizium anisopliae, Paecilomyces fumosoroseus) or parasitic (Hesperomyces virescens). We also consider the role of intra-guild predation (on the aphid-specific fungus Pandora neoaphidis and Beauveria bassiana) and finally indirect interactions such as coccinellids dispersing P. neoaphidis. We suggest that fungal pathogens are all too often forgotten natural enemies and future research should address the profound absence of knowledge in this field.

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Occurrence, Density, and Distribution of Parasitic Fungus <I>Hesperomyces virescens</I> (Laboulbeniales: Laboulbeniaceae) on Multicolored Asian Lady Beetle (Coleoptera: Coccinellidae)

Cited by 50 publications

References 25 publications

Harmonia axyridis (Coleoptera: Coccinellidae) as a host of the parasitic fungus Hesperomyces virescens (Ascomycota: Laboulbeniales, Laboulbeniaceae): A case report and short review

Harmonia axyridis (Coleoptera: Coccinellidae) as a host of the parasitic fungus Hesperomyces virescens (Ascomycota: Laboulbeniales, Laboulbeniaceae): A case report and short review

Threatening the Harvest: The Threat from Three Invasive Insects in Late Season Vineyards

Forgotten natural enemies: Interactions between coccinellids and insect-parasitic fungi

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