Role of Diadegma semiclausum (Hymenoptera: Ichneumonidae)in Controlling Plutella xylostell (Lepidoptera:Plutellidae): Cage Exclusion Experiments and Direct Observation
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Role of Diadegma semiclausum (Hymenoptera: Ichneumonidae)in Controlling Plutella xylostell (Lepidoptera:Plutellidae): Cage Exclusion Experiments and Direct Observation
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| Id. |
43158404 |
| Titulo |
Role of Diadegma semiclausum (Hymenoptera: Ichneumonidae)in Controlling Plutella xylostell (Lepidoptera:Plutellidae): Cage Exclusion Experiments and Direct Observation |
| Autor(es) |
Wang, X.
Duff, J.
Keller, M.A.
Zalucki, M.P.
Liu, S.
Bailey, P.
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| Localización |
Wang, X. and Duff, J. and Keller, M.A. and Zalucki, M.P. and Liu, S. and Bailey, P. (2004) Role of Diadegma semiclausum (Hymenoptera: Ichneumonidae)in Controlling Plutella xylostell (Lepidoptera:Plutellidae): Cage Exclusion Experiments and Direct Observation. Biocontrol Science and Technology, 14 (6). pp. 571-586.
http://era.dpi.qld.gov.au/558/
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| Versión |
1.0 |
| Estado |
Final
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| Descripción |
We evaluated the role of the larval parasitoid, Diadegma semiclausum Hellén (Hymenoptera: Ichneumonidae), in controlling Plutella xylostella (L.) (Lepidoptera: Plutellidae) by cage exclusion experiments and direct field observation during the winter season in southern Queensland, Australia. The cage exclusion experiment involved uncaged, open cage and closed cage treatments. A higher percentage (54-83%) of P. xylostella larvae on sentinel plants were lost in the uncaged treatment than the closed (4-9%) or open cage treatments (11-29%). Of the larvae that remained in the uncaged treatment, 72-94% were parasitized by D. semiclausum, much higher than that in the open cage treatment (8-37% in first trial, and 38-63% in second trial). Direct observations showed a significant aggregation response of the fieldD. semiclausum populations to high host density plants in an experimental plot and to high host density plots that were artificially set-up near to the parasitoid source fields. The degree of aggregation varied in response to habitat quality of the parasitoid source field and scales of the manipulated host patches. As a result, density-dependence in the pattern of parasitism may depend on the relative degree of aggregation of the parasitoid population at a particular scale. A high degree of aggregation seems to be necessary to generate density-dependent parasitism by D.semiclausum. Integration of the cage exclusion experiment and direct observation demonstrated the active and dominant role of this parasitoid in controlling P. xylostella in the winter season. A biologically based IPM strategy, which incorporates the use of D. semiclausum with Bt, is suggested for the management of P. xylostella in seasons or regions with a mild temperature.
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| Palabras clave |
Horticulture. Horticultural crops
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| Tipo de recurso |
journal article
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| Tipo de Interactividad |
Expositivo
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| Nivel de Interactividad |
muy bajo
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| Audiencia |
Estudiante
Profesor
Autor
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| Estructura |
Atomic |
| Coste |
no
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| Copyright |
sí
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| Requerimientos técnicos |
Browser: Any
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| Relación |
[References] http://dx.doi.org/10.1080/09583150410001682304
[References] http://era.dpi.qld.gov.au/558/
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| Fecha de contribución |
12-may-2009 |
| Contacto |
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