Phenology, synchrony and host range of the Tasmanian population of Cotesia urabae introduced into New Zealand for the biocontrol of Uraba lugens

Rowbottom, Raylea; Allen, Gordon; Walker, Paul; Berndt, Lisa A.

doi:10.1007/s10526-013-9524-0

Cited by 10 publications

(7 citation statements)

References 23 publications

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“…Adult females oviposit their eggs inside U. lugens by inserting their ovipositors into larvae, and a single parasitoid completes its development in each host larva (Berndt, 2010). Previous studies conducted on C. urabae have focused on its biology (Allen, 1990 a ; Allen & Keller, 1991), phenology (Allen, 1990 b ), competition (Berndt, 2010), dispersal behaviour (Avila et al , 2013 b ), host range (Berndt et al , 2009; Rowbottom et al , 2013; Avila et al , 2015), and host searching behaviour (Avila et al , 2016 a , b ). Additionally, there is just one previous study conducted on C. urabae describing a rearing methodology that included a recommended method to obtain mating (Berndt et al , 2013).…”

Section: Introductionmentioning

confidence: 99%

Courtship and mating behaviour in the parasitoid waspCotesia urabae(Hymenoptera: Braconidae): mate location and the influence of competition and body size on male mating success

Avila

Withers²,

Holwell

2016

Bull. Entomol. Res.

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Cotesia urabae is a solitary larval endoparasitoid that was introduced into New Zealand in 2011 as a classical biological control agent against Uraba lugens. A detailed knowledge of its reproductive biology is required to optimize mass rearing efficiency. In this study, the courtship and mating behaviour of C. urabae is described and investigated from a series of experiments, conducted to understand the factors that influence male mating success. Cotesia urabae males exhibited a high attraction to virgin females but not mated females, whereas females showed no attraction to either virgin or mated males. Male mating success was highest in the presence of a male competitor. Also, the time to mate was shorter and copulation duration was longer when a male competitor was present. Larger male C. urabae had greater mating success than smaller males when paired together with a single female. This knowledge can now be utilized to improve mass rearing methods of C. urabae for the future.

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Section: Introductionmentioning

confidence: 99%

Courtship and mating behaviour in the parasitoid waspCotesia urabae(Hymenoptera: Braconidae): mate location and the influence of competition and body size on male mating success

Avila

Withers²,

Holwell

2016

Bull. Entomol. Res.

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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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“…A parasitoid that emerges too early will be unable to find hosts in the right life stage to exploit (Rowbottom et al . 2013). While it is impossible at this time to predict exactly how a newly introduced biological control agent will adapt its phenology in a new geographic range, natural enemies that come from areas with similar climates are more likely to succeed in the place to which they are introduced (Hoelmer & Kirk 2005).…”

Section: Discussionmentioning

confidence: 99%

Why introducing a parasitoid of Paropsis charybdis Stål, 1860 (Coleoptera: Chrysomelidae) larvae is expected to enhance biological control of this Eucalyptus pest in New Zealand

et al. 2020

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Paropsis charybdis (Coleoptera: Chrysomelidae) has been a major pest of Eucalyptus spp. since invading New Zealand from Australia over 100 years ago. Here, we report on the phenology, egg parasitism and defoliation levels of P. charybdis at two Eucalyptus nitens plantations in the central North Island of New Zealand and assess the establishment prospects and potential impact of a new biological control agent, the larval parasitoid Eadya daenerys. Field monitoring found that 90–100% of first generation P. charybdis eggs emerged, showing that the existing egg parasitoids Enoggera nassaui (Hymenoptera: Braconidae) and Neopolycystus insectifurax (Hymenoptera: Pteromalidae) are ineffective at controlling this generation. Further field monitoring revealed effective control of second generation eggs by E. nassaui and N. insectifurax despite the presence of Baeoanusia albifunicle (Hymenoptera: Encyrtidae), a hyperparasitoid of E. nassaui. Phenology data show that first generation P. charybdis larvae will likely be synchronous with the adult emergence of E. daenerys (Hymenoptera: Braconidae) the new larval endoparasitoid proposed to be introduced from Australia. Climate matching predicts E. daenerys could establish in all areas of New Zealand where P. charybdisimpacted Eucalyptus spp. plantations are grown. The addition of a larval endoparasitoid could significantly contribute to the suppression of P. charybdis by decreasing first generation larval survival.

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Phenology, synchrony and host range of the Tasmanian population of Cotesia urabae introduced into New Zealand for the biocontrol of Uraba lugens

Cited by 10 publications

References 23 publications

Courtship and mating behaviour in the parasitoid waspCotesia urabae(Hymenoptera: Braconidae): mate location and the influence of competition and body size on male mating success

Courtship and mating behaviour in the parasitoid waspCotesia urabae(Hymenoptera: Braconidae): mate location and the influence of competition and body size on male mating success

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

Why introducing a parasitoid of Paropsis charybdis Stål, 1860 (Coleoptera: Chrysomelidae) larvae is expected to enhance biological control of this Eucalyptus pest in New Zealand

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