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No. de sistema: 000024938

LDR _ _ 00000nam^^22^^^^^za^4500
008 _ _ 020419s2002^^^^mx^^^^^f^m^^^z000^0^eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-cp
044 _ _ a| mx
084 _ _ a| TE/632.96
b| L6
100 1 _ a| López Ortega, Maurilio
245 1 0 a| Parasitoid mediated transmission of an iridescent virus
c| Maurilio López Ortega
246 1 1 a| Transmisión de un virus iridiscente por un parasitoide
260 _ _ a| Tapachula, Chiapas, México
b| El Colegio de la Frontera Sur
c| 2002
300 _ _ a| 36 hojas
c| 28 centímetros
502 _ _ a| Tesis (Maestría en Ciencias en Recursos Naturales y Desarrollo Rural)--El Colegio de la Frontera Sur, 2002
504 _ _ a| Bibliografía (hoja 25-31)
520 1 _ a| The extremely high infectivlty of invertebrate iridescent viruses (IIVs) by injection has lead to the suggestion that insect parasitoids could transmit IIVs during the act of oviposition. An IIV was isolated from Spodoptera frugiperdai}. E. Smith) larvae in Chiapas State, Mexico. We examined the interaction between this virus and the solitary ichneumonid endoparasitoid Eiphosoma vitticoHe Cressou. In simultaneous choice tests, parasitoids examined and stung significantly more virus infected than healthy larvae, apparently due to a lack of defense reaction in virus infected hosts. There was no significant difference in the mean interval between exposure and attack by parasitoids. All of the female parasitoids that stung a virus infected host transmitted the virus to healthy larvae. Each female parasitoid transmitted the virus to an average (± SE) of 3.7 ± 0.3 larvae immediately after stinging a patently infected larva. This number fell markedly at 1 day and 2 days after stinging the infected larva. Parasitoid survival to adulthood was completely eliminated in hosts infected by IIV at 1 and 3 days postparasitsm (due to premature death of the host) and was severely reduced in host inoculated at 7 and 11 days postparasitism. Most parasitoids that developed in patently infected hosts themselves developed a patent infection and died prior to emergence. Parasitoids that successfully developed in virus inoculated hosts did not differ in pupal weight or wing length compared to controls. Female parasitoids that emerged from virus inoculated hosts did not transmit the virus to healthy larvae. Two experiments performed using healthy and virus infected larvae on maize plants in field cages with and without parasitoids indicated that virus transmission to healthy larvae only occurred in cages containing infected hosts (as inoculum) and parasitoids (as vectors).
520 1 _ a| We suggest that the polyphagous habits of many noctuld parasitoids combined with the catholic host range of most IIVs may represent a mechanism for the transmission of IIVs between different host species in the field.
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Iridovirus
650 _ 4 a| Spodoptera frugiperda
650 _ 4 a| Eiphosoma vitticolle
650 _ 4 a| Bioquímica entomológica
650 _ 4 a| Control biológico de plagas
650 _ 4 a| Parasitoides
650 _ 4 a| Entomología
651 _ 4 a| Chiapas (México)
700 1 _ a| Williams, Trevor
e| tutor
700 1 _ a| Rojas, Julio C.
e| asesor
700 1 _ a| Vandame, Rémy
e| asesor
901 _ _ a| Maestría
905 _ _ a| Ecosur
905 _ _ a| Frosur
905 _ _ a| CRIIS
905 _ _ a| Biblioelectrónica
LNG eng
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Parasitoid mediated transmission of an iridescent virus / Maurilio López Ortega = Transmisión de un virus iridiscente por un parasitoide
López Ortega, Maurilio (autor)
Williams, Trevor (tutor)
Rojas, Julio C. (asesor)
Vandame, Rémy (asesor)
Editor: Tapachula, Chiapas, México : El Colegio de la Frontera Sur, 2002
Descripción: 36 hojas ; 28 centímetros
Tesis: Tesis (Maestría en Ciencias en Recursos Naturales y Desarrollo Rural)--El Colegio de la Frontera Sur, 2002
Clasificación: TE/632.96/L6
Bibliotecas:
Campeche , Chetumal , San Cristóbal , Tapachula , Villahermosa
Nota: Bibliografía (hoja 25-31)
No. de sistema: 24938
Tipo: Tesis - Maestría


Inglés

"The extremely high infectivlty of invertebrate iridescent viruses (IIVs) by injection has lead to the suggestion that insect parasitoids could transmit IIVs during the act of oviposition. An IIV was isolated from Spodoptera frugiperdai}. E. Smith) larvae in Chiapas State, Mexico. We examined the interaction between this virus and the solitary ichneumonid endoparasitoid Eiphosoma vitticoHe Cressou. In simultaneous choice tests, parasitoids examined and stung significantly more virus infected than healthy larvae, apparently due to a lack of defense reaction in virus infected hosts. There was no significant difference in the mean interval between exposure and attack by parasitoids. All of the female parasitoids that stung a virus infected host transmitted the virus to healthy larvae. Each female parasitoid transmitted the virus to an average (± SE) of 3.7 ± 0.3 larvae immediately after stinging a patently infected larva. This number fell markedly at 1 day and 2 days after stinging the infected larva. Parasitoid survival to adulthood was completely eliminated in hosts infected by IIV at 1 and 3 days postparasitsm (due to premature death of the host) and was severely reduced in host inoculated at 7 and 11 days postparasitism. Most parasitoids that developed in patently infected hosts themselves developed a patent infection and died prior to emergence. Parasitoids that successfully developed in virus inoculated hosts did not differ in pupal weight or wing length compared to controls. Female parasitoids that emerged from virus inoculated hosts did not transmit the virus to healthy larvae. Two experiments performed using healthy and virus infected larvae on maize plants in field cages with and without parasitoids indicated that virus transmission to healthy larvae only occurred in cages containing infected hosts (as inoculum) and parasitoids (as vectors)."

"We suggest that the polyphagous habits of many noctuld parasitoids combined with the catholic host range of most IIVs may represent a mechanism for the transmission of IIVs between different host species in the field."

SIBE Campeche
Codigo de barra
Estado
Colección
ECO040000981
(Disponible)
Publicaciones ECOSUR
SIBE Chetumal
Codigo de barra
Estado
Colección
ECO030006637
(Disponible)
Publicaciones ECOSUR
SIBE San Cristóbal
Codigo de barra
Estado
Colección
ECO010017782
(Disponible)
Publicaciones ECOSUR
ECO010016330
(Disponible)
Publicaciones ECOSUR
SIBE Tapachula
Codigo de barra
Estado
Colección
ECO020003051
(Disponible)
Publicaciones ECOSUR
SIBE Villahermosa
Codigo de barra
Estado
Colección
ECO050001372
(Disponible)
Publicaciones ECOSUR

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