Parasitism of Developing Eggs by Trichogramma pretiosum (Hymenoptera: Trichogrammatidae): Host Age Preference and Suitability

Ruberson, John R.; Kring, T. J.

doi:10.1006/bcon.1993.1007

Cited by 66 publications

(51 citation statements)

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“…Assim como registrado neste estudo, um menor tempo de desenvolvimento também for observado para T. pretiosum em ovos mais novos de Helicoverpa zea (Ruberson & Kring 1993). Miura & Kobayashi (1998) observaram apenas desenvolvimento de Trichogramma chilonis em ovos de Plutella xylostella de 24 e 48 horas, sendo que nos de 72 h não houve emergência.…”

Section: Discussionunclassified

Influência da idade do hospedeiro e da aprendizagem no comportamento quimiotáxico e no parasitismo de Trichogramma pretiosum

Vargas

Sant’Ana

Morais

et al. 2017

Iheringia, Sér. Zool.

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ABSTRACT. Infl uence of host age and learning on chemotactic behavior and parasitism of Trichogramma pretiosum. Trichogramma pretiosum Riley, 1879 reared on Ephestia kuehniella Zeller, 1879 eggs, have been used in biological control of Spodoptera frugiperda (J. E. Smith, 1797). However, host age and experience just after emergence might have some infl uence on parasitism and parasitoid behavior. This study evaluated the infl uence of S. frugiperda host age and egg odor experience, on chemotactic behavior and parasitism of T. pretiosum. Spodoptera frugiperda eggs with 24, 48 and 72 hours were exposed to T. pretiosum females. Parasitoid time experience, in the same host, was evaluated within 1, 3, 4, 5, 6 and 24 hours, as well as, its host exposed time (1, 2, 3 and 24 hours). Chemotactic responses of T. pretiosum (experienced and inexperienced females) to S. frugiperda egg extracts were recorded in Y-tube olfactometer. We also observe parasitism rates (choice tests) in insects with and without experience. The parasitism average was higher in S. frugiperda eggs with 24 hours. Inexperienced females and those experienced for 1, 3 and 4 hours, parasitized less S. frugiperda eggs compared to those for 5, 6 and 24 hours. There was no diff erence in parasitism from females exposed for 2, 3 and 24 hours when compared to those exposed for one hour. Experienced females were more attracted to S. frugiperda eggs odor than to control (hexano). Parasitism percentage, by inexperienced parasitoids, was greater in E. kuehniella eggs (original host) than in S. frugiperda, however it was not observed in experienced females.KEYWORDS: Biological control, egg parasitoid, eggs extract.RESUMO. Trichogramma pretiosum Riley, 1879 mantido em ovos de Ephestia kuehniella Zeller, 1879, tem sido utilizado no controle biológico de Spodoptera frugiperda (J. E. Smith, 1797). No entanto, fatores como idade do hospedeiro e experiência prévia, podem infl uenciar o parasitismo e o comportamento do parasitoide. Esse estudo avaliou a infl uência da idade dos ovos e da experiência em ovos e extrato de ovos de S. frugiperda no comportamento quimiotáxico e no parasitismo de T. pretiosum. Ovos de S. frugiperda com 24, 48 e 72 horas, foram expostos a fêmeas de T. pretiosum. Também foi avaliado o tempo de experiência do parasitoide, no mesmo hospedeiro, por 1, 3, 4, 5, 6 e 24 horas, assim como, seu tempo de exposição (1, 2, 3 e 24 horas). As respostas quimiotáxicas de T. pretiosum (experiente e não experiente) em extrato de ovos de S. frugiperda foram observadas em olfatômetro tipo Y. As taxas de parasitismo foram registradas em teste de escolha, com insetos experientes e inexperientes com ovos e extrato de ovos de S. frugiperda. O parasitismo em S. frugiperda foi signifi cativamente maior em ovos com 24 horas de idade. Fêmeas inexperientes e experientes por 1, 3 e 4 horas, apresentaram uma menor taxa de parasitismo, quando comparadas a fêmeas expostas por 5, 6 e 24 horas. Não houve diferença de parasitismo em fêmeas expostas por 2, 3 e 24 horas, comparadas à...

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Section: Discussionunclassified

Influência da idade do hospedeiro e da aprendizagem no comportamento quimiotáxico e no parasitismo de Trichogramma pretiosum

Vargas

Sant’Ana

Morais

et al. 2017

Iheringia, Sér. Zool.

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“…generally prefers younger host eggs (Godin & Boivin 2000;Takada et al 2000). The number of Trichogrammatid progeny decreases significantly with older host eggs (Miura & Kobayashi 1998;Takada et al 2000) due to depletion of essential nutrients (Ruberson & Kring 1993) or host embryo cephalic capsule sclerotization (Guang & Oloo 1990). In our study, the highest level of parasitism and number of parasitoid progeny was observed on 1 d old host eggs ( Table 2).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Biological and Biorational Control Tactics for Suppression of Nantucket Pine Tip Moth Damage in Virginia Pine Christmas Trees

Philip

Orr

Hain

2005

Journal of Economic Entomology

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“…Moreover, old eggs are less suitable as hosts as they adversely affect several parasitoid biological parameters, such as percentage parasitism, developmental time (Da Rocha et al, 2006), adult emergence (Bruce et al, 2009), body size and sex ratio (Ruberson & Kring, 1993). These effects may be due to changes in the chemical composition as nutrients are gradually consumed by the host embryo and/or changes in the physical characteristics of the chorion, which becomes more rigid as the egg ages (Barret & Schmidt, 1991;Bai et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

Effect of host egg age on preference, development and arrestment of Telenomus remus (Hymenoptera: Scelionidae)

Peñaflor¹,

Sarmento²,

Silva³

et al. 2012

Eur. J. Entomol.

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Abstract. Age of host eggs can be a limiting factor for egg parasitoids. It is expected that old eggs are less preferred by egg parasitoids, which can discriminate between eggs of different ages by using chemical cues. The objective of this study was to determine the preference, development and arrestment of Telenomus remus Nixon (Hymenoptera: Scelionidae) parasitizing Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) eggs of different ages. This egg parasitoid preferred to parasitize 1-and 2-day-old eggs rather than 3-day-old eggs in choice and no-choice assays. However, although the percentage emergence of parasitoids is significantly lower from 2-and 3-day-old eggs, the sex ratio and developmental time are unaffected. Parasitoids spent longer searching substrates impregnated with extracts of 1-and 2-day old eggs than 3-day-old eggs. Our results reveal that T. remus is able to distinguish the most suitable (1-day-old) from the least suitable (3-day-old) host eggs, but unable to recognize the unsuitability of intermediate aged eggs. Egg arrestants may be responsible for the preference of T. remus for ovipositing in 1-and 2-day old eggs.

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Parasitism of Developing Eggs by Trichogramma pretiosum (Hymenoptera: Trichogrammatidae): Host Age Preference and Suitability

Cited by 66 publications

References 0 publications

Influência da idade do hospedeiro e da aprendizagem no comportamento quimiotáxico e no parasitismo de Trichogramma pretiosum

Influência da idade do hospedeiro e da aprendizagem no comportamento quimiotáxico e no parasitismo de Trichogramma pretiosum

Evaluation of Biological and Biorational Control Tactics for Suppression of Nantucket Pine Tip Moth Damage in Virginia Pine Christmas Trees

Effect of host egg age on preference, development and arrestment of Telenomus remus (Hymenoptera: Scelionidae)

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