Immature stages of Microplitis rufiventris KOK. (Hym., Braconidae)

Tawfik, M. F. S.; Hafez, M.; Ibrahim, A. A.

doi:10.1002/mmnd.4810270105

Cited by 2 publications

(2 citation statements)

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“…Studies on M. rufiventris have mostly focused on its physiology and development (Altahtawy et al, 1976b;Hegazi et al, 1977;Tawfik et al, 1980;Hegazi and Shabaan, 1984). From previous studies we know that naïve females of M. rufiventris are also highly attracted to induced maize odours (Hoballah and Turlings, 2005;Tamò, 2006), but the effect of experience on this behaviour is unclear (Hoballah and Turlings, 2005).…”

Section: Introductionmentioning

confidence: 98%

A comparison of naïve and conditioned responses of three generalist endoparasitoids of lepidopteran larvae to host-induced plant odours

et al. 2006

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Many parasitic wasps that exploit herbivores as their hosts make use of herbivoreinduced plant odours to locate their victims and these wasps often exhibit an ability to learn to associate specific plant-produced odours with the presence of hosts. This associative learning is expected to allow generalist parasitoids to focus on cues that are most reliably associated with current host presence, but evidence supporting this hypothesis is ambiguous. Using a sixarm olfactometer we compared the responses of three generalist larval endoparasitoids, Cotesia marginiventris (Hymenoptera: Braconidae), Microplitis rufiventris (Hymenoptera: Braconidae) and Campoletis sonorensis (Hymenoptera: Ichneumonidae), to the induced odours of three plant species: maize (Zea mays), cowpea (Vigna unguiculata), and cotton (Gossypium hirsutum). We tested the responses of naïve females as well as of females that were first conditioned by parasitising host larvae feeding on one of the plant species. Despite similarities in biology and host range the three wasp species responded entirely differently. Naïve C. marginiventris and C. sonorensis chose equally among the induced odours of the three plants, whereas naïve M. rufiventris, which may have a somewhat more restricted host range, tended to prefer the odour of maize. After conditioning, most C. marginiventris females chose the odour of the plant species that they had experienced, but conditioned M. rufiventris showed an even stronger preference for maize odours, independently of the plant they had experienced. Cotesia sonorensis did not show any change in its preference after conditioning. We speculate that its extremely broad host range allows C. sonorensis females to use fixed responses to cues commonly associated with plants damaged by Lepidoptera. These results imply that different generalist parasitoids may employ different foraging strategies and that associative learning is not necessarily part of it.

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Section: Introductionmentioning

confidence: 98%

A comparison of naïve and conditioned responses of three generalist endoparasitoids of lepidopteran larvae to host-induced plant odours

et al. 2006

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“…The solitary endoparasitoid Microplitis rufiventris Kok. is involved in this respect (HEGAZI et al 1977b;TAWFIK et al 1980). Nowadays, the entomopathogenic bacterium Bacillus thuringiensis and the entomopathogenic fungus Beauveria bassiana are used to control this pest (ALTAHTAWY and ABALESS 1972).…”

Section: Introductionmentioning

confidence: 99%

Interactions between Bacillus thuringiensis Berl., Beauveria bassiana (Bals.) Vuill. and the host/parasitoid system Spodoptera littoralis (Boisd.)/Microplitis rufiventris Kok

El-Maghraby

Hegab

Yousif-Khalil

1988

J Applied Entomology

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Laboratory experiments were undertaken to study the relationships between the solitary endoparasitoid Microplitis rufiventris Kok. in the Egyptian cotton leafworm, Spodoptera littoralis (Boisd.) fed on the bacterial pathogen, Bacillus thuringiensis Berl. and infected with the fungus Beauveria bassiana (Bals.) Vuill. Many effects were observed on the parasitoid after treating host larvae with the entomopathogens such as: prolongation of the total developmental period, abnormality of the cocoons induced inside the host larvae and reduction in the percentage of adult emergence. Antagonism between the bacterium, B. thuringiensis and the fungus, B. bassiana in the host‐parasitoid system, Spodoptera/Microplitis affected pronouncely the mortality, as it was decreased in host and increased in the parasitoid. Zusammenfassung Beziehungen zwischen den Pathogenen Bacillus thuringiensis Berl. und Beauveria bassiana (Beds.) Vuill. einerseits und dem Wirt/Parasitoid‐System Spodoptera littoralis (Boisd.)/Microplitis rufiventris Kok. andererseits Es wurden Laborexperimente durchgeführt, um die Beziehungen zwischen dem solitären Endoparasiten Microplitis rufiventris Kok. in der ägyptischen Baumwolleule Spodoptera litteralis (Boisd.) nach Fütterung der Raupen mit dem Bakterium Bacillus thuringiensis Berl. sowie nach Infektion mit dem Pilz Beauveria bassiana (Bals.) Vuill. zu untersuchen. Zahlreiche Wirkungen wurden beobachtet wie z.B.: Verlängerung der Gesamtentwicklung, Abnormalität der Kokons im Innern der Wirtsraupen sowie Verringerung des Adultenschlüpfens. Eine antagonistische Beziehung zwischen Bacillus thuringiensis und Beauveria bassiana führte im Wirt/Parasitoid‐System Spodoptera/Microplitis zu stark erhöhter Mortalität des Parasitoiden.

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Immature stages of Microplitis rufiventris KOK. (Hym., Braconidae)

Cited by 2 publications

References 1 publication

A comparison of naïve and conditioned responses of three generalist endoparasitoids of lepidopteran larvae to host-induced plant odours

A comparison of naïve and conditioned responses of three generalist endoparasitoids of lepidopteran larvae to host-induced plant odours

Interactions between Bacillus thuringiensis Berl., Beauveria bassiana (Bals.) Vuill. and the host/parasitoid system Spodoptera littoralis (Boisd.)/Microplitis rufiventris Kok

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