Reproduction and Immature Development of Egg Parasitoids

Boivin, Guy

doi:10.1007/978-1-4020-9110-0_1

Cited by 18 publications

(20 citation statements)

References 103 publications

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“…On the other hand, when eggs of the first clutch were older (17-19 h and 27-29 h), the occurrence of stabbing increased up to 89.4%, but the second clutch survived in less than 4% of all cases. On the other hand, successful infanticide in T4 could be explained by the larger size and the low mobility of T. euproctidis larvae (Boivin, 2010b). In this treatment, females attempted infanticide 85.0% of the time and the second clutch survived in 57.1% of the cases.…”

Section: Infanticide Host Discrimination and Survival Of The Second mentioning

confidence: 87%

“…Larvae are vermiform with reduced mandibles and low mobility (Boivin, 2010b). one or several larva can develop per host).…”

Section: Biological Modelmentioning

confidence: 99%

“…In short intervals (0-1 h), high survival of the second clutch was observed, but the second female attempted infanticide on the first clutch only 6.1% of the time. Trichogramma eggs are small and float freely in the host haemocele (Boivin, 2010b), making them difficult to target. Infanticide was only effective when the second females were exploiting hosts containing conspecific larvae (39-41 h).…”

Section: Infanticide Host Discrimination and Survival Of The Second mentioning

confidence: 99%

“…In this study, we measured the impact of superparasitism time intervals on egg parasitoids, which are idiobionts and thus exploit a finite amount of resources (Boivin, 2010b). We examined the survival and fitness of progeny in Trichogramma euproctidis (Girault) (Hymenoptera: Trichogrammatidae) when superparasitising Ephestia kuehniella (Zeller) (Lepidoptera: Pyralidae) host eggs.…”

Section: Introductionmentioning

confidence: 99%

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Impact of superparasitism time intervals on progeny survival and fitness of an egg parasitoid

Duval

Brodeur

Doyon

et al. 2018

Ecological Entomology

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1.Superparasitism influences the fitness of female parasitoids and their progeny, and increasing time interval between oviposition bouts generally reduces survival probabilities of the second clutch. However, the timing of superparasitism may, under certain conditions, favour the second clutch.2. This study investigated the effects of superparasitism time intervals on survival and fitness of both clutches, allowing the egg parasitoid Trichogramma euproctidis to parasitise previously parasitised Ephestia kuehniella host eggs at different time intervals.3. In short intervals (0-1 h), a significant advantage was found for the second clutch over the first clutch (93.1% survival). In contrast, the second clutch was outcompeted by the first clutch in 17-19 h and 27-29 h intervals. Females deposited their eggs into larvae (intraspecific hyperparasitism) in a 39-41 h interval with a probability of survival of 57.1%. Females mostly refused to hyperparasitise pupae (∼80% rejection at 124-126 h), and when they did, their progeny never survived. 4. Hyperparasitism significantly increased parasitoid mortality in both clutches from less than 20% (superparasitism only) to over 35%.5. Except on newly laid eggs (0-1 h), superparasiting females were frequently observed attempting to stab immatures of all stages (from 36.4% to 89.4% of all ovipositions depending on treatment), but infanticide only appeared to succeed on larvae (39-41 h).6. When the second clutch survived, emerging parasitoids were smaller than control individuals, probably due to resource depletion. 7. These results suggest that T. euproctidis females can detect that a host has been previously parasitised but they cannot perceive superparasitism time intervals.

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Section: Infanticide Host Discrimination and Survival Of The Second mentioning

confidence: 87%

“…Larvae are vermiform with reduced mandibles and low mobility (Boivin, 2010b). one or several larva can develop per host).…”

Section: Biological Modelmentioning

confidence: 99%

Section: Infanticide Host Discrimination and Survival Of The Second mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of superparasitism time intervals on progeny survival and fitness of an egg parasitoid

Duval

Brodeur

Doyon

et al. 2018

Ecological Entomology

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“…Its present day areal extends throughout European mainland, including, but not only, Austria, Belgium, Bulgaria, Germany, France, Italy, Moldova, Romania, Spain, Switzerland, The Netherlands and Ukraine (Fauna Europea, http://www.faunaeur.org/, accessed on June 4 th , 2015). The species develops idiobiontically inside the egg of the host (Boivin, 2010), where it also overwinters (Stengel et al, 1977). …”

Section: Trichogramma Brassicae Bezdenko 1968mentioning

confidence: 99%

Parasitoid inventarisation of European corn borer (Ostrinia nubilalis Hübner, 1796) and options for its biological control in Slovenia

Razinger

Herz

Urek

2016

AAS

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European corn borer (Ostrinia nubilalis) (ECB) is an important maize pest in central and northern Europe. Presently it is controlled by insecticides or biological agents such as Trichogramma brassicae in several European countries, excluding Slovenia, where the pest's pressure is highly variable and no appropriate mechanization is available. Lessening the dependence on chemical pesticides is an integral part of the European Union's agenda for agriculture. Mass release of Trichogramma spp. could be seen as a promising alternative for ECB control in countries with a highly fluctuating ECB pressure and no mechanization for insecticide applications. However, no records of naturally occurring hymenopteran parasitoids of ECB exist in Slovenia. To address this important under-researched topic and provide the expert basis for potential introduction of ECB egg parasitoids in Slovene maize production, a systematic inventarisation programme of ECB parasitoids was launched in 2010. Additionally, ECB flight was monitored in 2011 and 2012 at two locations in Slovenia: Jablje and Rakičan. In both locations two ECB generations were observed. ECB was fist observed at the end of May in Rakičan. During the five years of the systematic survey we discovered two ECB parasitoid species. ECB egg masses were parasitized by Trichogramma brassicae, whereas ECB pupae were parasitized by Tycherus nigridens, with 6 or 7 % parasitation rate, respectively. T. nigridens represents a new taxon report for Slovenia. We conclude that there is a strong need for undertaking systematic surveys of natural enemies of agricultural pests.

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Enhancement of Natural Control Ecosystem Services for Insect Pest Management by Manipulating Biodiversity in Rice-Based Ecosystems

Zhu

Lü

Chen

et al. 2020

Progress in Biological Control

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Reproduction and Immature Development of Egg Parasitoids

Cited by 18 publications

References 103 publications

Impact of superparasitism time intervals on progeny survival and fitness of an egg parasitoid

Impact of superparasitism time intervals on progeny survival and fitness of an egg parasitoid

Parasitoid inventarisation of European corn borer (Ostrinia nubilalis Hübner, 1796) and options for its biological control in Slovenia

Enhancement of Natural Control Ecosystem Services for Insect Pest Management by Manipulating Biodiversity in Rice-Based Ecosystems

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