Dispersal behavior of the parasitic wasp Cotesia urabae (Hymenoptera: Braconidae): A recently introduced biocontrol agent for the control of Uraba lugens (Lepidoptera: Nolidae) in New Zealand

Avila, Gonzalo A.; Berndt, Lisa A.; Holwell, Gregory I.

doi:10.1016/j.biocontrol.2013.05.008

Cited by 14 publications

(15 citation statements)

References 44 publications

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“…If we find that the movement of individuals is consistent with genetic structure, then dispersal is likely to be an important part of the observed genetic structure (Slatkin 1987). Parasitoid dispersal varies greatly among species: from the order of metres in Cotesia urabae (Avila et al 2013) or Aphytis melinus (Zappal a et al 2012), to hundreds of metres in Trichogramma spp. (Kuske et al 2003), to kilometres in Nasonia vitripennis (Grillenberger et al 2009) and, when assisted by wind, even to tens of kilometres (Zavodna et al 2005;Ahmed et al 2009).…”

Section: Dispersalmentioning

confidence: 81%

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Strong dispersal in a parasitoid wasp overwhelms habitat fragmentation and host population dynamics

2016

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The population dynamics of a parasite depend on species traits, host dynamics and the environment. Those dynamics are reflected in the genetic structure of the population. Habitat fragmentation has a greater impact on parasites than on their hosts because resource distribution is increasingly fragmented for species at higher trophic levels. This could lead to either more or less genetic structure than the host, depending on the relative dispersal rates of species. We examined the spatial genetic structure of the parasitoid wasp Hyposoter horticola, and how it was influenced by dispersal, host population dynamics and habitat fragmentation. The host, the Glanville fritillary butterfly, lives as a metapopulation in a fragmented landscape in the Åland Islands, Finland. We collected wasps throughout the 50 by 70 km archipelago and determined the genetic diversity, spatial population structure and genetic differentiation using 14 neutral DNA microsatellite loci. We compared the genetic structure of the wasp with that of the host butterfly using published genetic data collected over the shared landscape. Using maternity assignment, we also identified full-siblings among the sampled parasitoids to estimate the dispersal range of individual females. We found that because the parasitoid is dispersive, it has low genetic structure, is not very sensitive to habitat fragmentation and has less spatial genetic structure than its butterfly host. The wasp is sensitive to regional rather than local host dynamics, and there is a geographic mosaic landscape for antagonistic co-evolution of host resistance and parasite virulence.

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Section: Dispersalmentioning

confidence: 81%

“…Parasitoid dispersal varies greatly among species: from the order of metres in Cotesia urabae (Avila et al . ) or Aphytis melinus (Zappalà et al . ), to hundreds of metres in Trichogramma spp.…”

Section: Discussionmentioning

confidence: 99%

Strong dispersal in a parasitoid wasp overwhelms habitat fragmentation and host population dynamics

2016

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“…Though there was no significant difference in dispersal distance from the release site, low parasitism rates in crop interiors indicate avoidance of this area. Other agricultural systems show greater parasitism adjacent to parasitoid release sites [52,53], and this is logical given limited parasitoid dispersal capacity. Surprisingly, the next highest parasitism rate occurred at 50 m, the farthest point from the release site.…”

Section: Parasitoid Release and Dispersal Assessmentmentioning

confidence: 99%

Establishment in an Introduced Range: Dispersal Capacity and Winter Survival of Trissolcus japonicus, an Adventive Egg Parasitoid

Lowenstein

Andrews

Hilton

et al. 2019

Insects

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The herbivorous brown marmorated stink bug, Halyomorpha halys, has spread globally, and one of its key parasitoids, Trissolcus japonicus, has recently been detected in the pest's introduced range. For an exotic natural enemy to impact its targeted host in a novel environment, it must disperse, locate hosts, and potentially be redistributed to susceptible sites. Through intentionally releasing T. japonicus across four Oregon eco-regions, we investigated an introduced parasitoid's dispersal capacity in urban sites and in two perennial crops, hazelnut and raspberry. In a second paired field and laboratory study, we investigated T. japonicus survival in different plant materials. Within three days of release, adult T. japonicus located host egg masses at 45% of sites and, one year later, were detected at 40% of release sites. Areas where released wasps survived winter were mostly urban or semi-natural. In commercial crop release experiments, we recovered the highest percentage of wasps in raspberry within 5 m of the release site but found no statistical difference in dispersal distance with some wasps dispersing up to 50 m. Adult parasitoids survived up to 16 weeks outdoors in the winter, with greater survival over time in bark compared to leaf litter. Wasp survival remained above 50% over the course of a simulated winter environment without precipitation. Our work affirms the continuation of H. halys parasitism by T. japonicus in novel environments and provides insight into the high population sizes necessary to survive winter and locate host egg masses the following season.

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“…Adult C. urabae females lay eggs inside U. lugens by inserting their ovipositors into the larvae. Several studies have been conducted on the biology (Allen, 1990b;Allen & Keller, 1991), phenology (Allen, 1990a), competition (Berndt, 2010), dispersal behaviour (Avila et al, 2013b), and host range (Berndt et al, 2009;Rowbottom et al, 2013;Avila et al, 2015) of C. urabae. Several studies have been conducted on the biology (Allen, 1990b;Allen & Keller, 1991), phenology (Allen, 1990a), competition (Berndt, 2010), dispersal behaviour (Avila et al, 2013b), and host range (Berndt et al, 2009;Rowbottom et al, 2013;Avila et al, 2015) of C. urabae.…”

Section: Introductionmentioning

confidence: 99%

“…Cotesia urabae females are able to attack the same larva several times, but only one single parasitoid completes its development in each host larva (Berndt, 2010). Several studies have been conducted on the biology (Allen, 1990b;Allen & Keller, 1991), phenology (Allen, 1990a), competition (Berndt, 2010), dispersal behaviour (Avila et al, 2013b), and host range (Berndt et al, 2009;Rowbottom et al, 2013;Avila et al, 2015) of C. urabae. However, its hostsearching behaviour has not been investigated, including the specific olfactory cues used by C. urabae in locating its host habitat, host insect, and mates.…”

Section: Introductionmentioning

confidence: 99%

Olfactory cues used in host‐habitat location and host location by the parasitoid Cotesia urabae

Avila

Withers

Holwell

2016

Entomologia Exp Applicata

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There is a growing body of evidence that many hymenopteran parasitoids make use of olfaction as the primary mechanism to detect and locate hosts. In this study, a series of bioassays was conducted to investigate the orientation behaviour of the gum leaf skeletonizer larval parasitoid Cotesia urabae Austin & Allen (Hymenoptera: Braconidae) in both Y-tube and four-arm olfactometers. In a Y-tube olfactometer, male C. urabae were attracted only to virgin conspecific females. Host-plant leaves, damaged leaves, host larvae, and host larvae feeding on leaves were highly attractive to female C. urabae, whereas host frass and conspecific males were not. The multiple-comparison bioassay conducted in a four-arm olfactometer clearly indicates that C. urabae females were significantly more attracted to the host Uraba lugens Walker (Lepidoptera: Nolidae) larvae feeding on Eucalyptus fastigata H Deane & Maiden (Myrtaceae) leaves than to any other of the odour sources tested. The results of this study show that C. urabae individuals responded to chemical cues specific to the host plant and target host insect, and support hypotheses that unreliable cues are not utilized for host location by specific natural enemies.

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Dispersal behavior of the parasitic wasp Cotesia urabae (Hymenoptera: Braconidae): A recently introduced biocontrol agent for the control of Uraba lugens (Lepidoptera: Nolidae) in New Zealand

Cited by 14 publications

References 44 publications

Strong dispersal in a parasitoid wasp overwhelms habitat fragmentation and host population dynamics

Strong dispersal in a parasitoid wasp overwhelms habitat fragmentation and host population dynamics

Establishment in an Introduced Range: Dispersal Capacity and Winter Survival of Trissolcus japonicus, an Adventive Egg Parasitoid

Olfactory cues used in host‐habitat location and host location by the parasitoid Cotesia urabae

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