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Factors affecting the biological control of California red scale Aonidiella aurantii (Hemiptera: Diaspididae) by Aphytis (Hymenoptera: Aphelinidae) in eastern Spain citrus: host size, ant activity, and adult parasitoid food sources

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Factors affecting the biological control of California red scale Aonidiella aurantii (Hemiptera: Diaspididae) by Aphytis (Hymenoptera: Aphelinidae) in eastern Spain citrus: host size, ant activity, and adult parasitoid food sources

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dc.contributor.advisor García Mari, Ferran es_ES
dc.contributor.advisor Tena Barreda, Alejandro es_ES
dc.contributor.author Pekas, Apostolos es_ES
dc.date.accessioned 2011-03-14T08:15:34Z
dc.date.available 2011-03-14T08:15:34Z
dc.date.created 2011-02-04T09:00:00Z es_ES
dc.date.issued 2011-03-14T08:15:29Z es_ES
dc.identifier.uri http://hdl.handle.net/10251/10293
dc.description.abstract California red scale (CRS), Aonidiella aurantii (Maskell) (Hemiptera: Diaspididae), one of the most important pests of citrus worldwide, began to cause damages in eastern Spain in 1986. The main biological control agents of A. aurantii in this zone are the native parasitoid A. chrysomphali (Mercet) and the introduced A. melinus DeBach (both Hymenoptera: Aphelinidae). Nevertheless, the control they exert is insufficient. In order to improve the biological control of A. aurantii we studied several biotic factors that may affect the efficiency of A. chrysomphali and A. melinus in the field. More concretely, we studied the spatial and temporal variation in the scale size, the host sizes used by A. chrysomphali and A. melinus as well as the influence of host size on various parasitoid traits. Moreover, we studied the foraging ecology and the effect of the ants native to the Mediterranean on the populations of the scale and, finally, the nutritional state and food sources used by adult A. melinus in the field. In the field, the body size of A. aurantii varied with plant substrate, locality, time of the year, and probably, with the nutritional state of the host plant. Plant substrate was found to substantially influence the body size of A. aurantii with scales being significantly larger on fruits that on leaves or twigs. Another important source of variation for A. aurantii size was geographic location since significant differences were found among orchards. Moreover, significant seasonal variation in the body size of A. aurantii was observed; body sizes were smaller during summer and autumn, apparently due to the effect of temperature. Finally, a positive relationship between the content of potassium in leaves and scale size was observed. From all the above factors, temperature related seasonal variation had the most profound effect on A. aurantii size. Aphytis chrysomphali and A. melinus used different sizes of A. aurantii in the field. es_ES
dc.language Inglés es_ES
dc.rights Reserva de todos los derechos es_ES
dc.source Riunet
dc.subject Aonidiella aurantii es_ES
dc.subject Aphytis melinus es_ES
dc.subject Aphytis chrysomphali es_ES
dc.subject Control biológico es_ES
dc.subject Hormigas es_ES
dc.subject HPLC es_ES
dc.subject Interacciones multitroficas es_ES
dc.subject Parasitoides es_ES
dc.subject Sex ratio es_ES
dc.subject.classification PRODUCCION VEGETAL es_ES
dc.title Factors affecting the biological control of California red scale Aonidiella aurantii (Hemiptera: Diaspididae) by Aphytis (Hymenoptera: Aphelinidae) in eastern Spain citrus: host size, ant activity, and adult parasitoid food sources
dc.type Tesis doctoral es_ES
dc.identifier.doi 10.4995/Thesis/10251/10293 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ecosistemas Agroforestales - Departament d'Ecosistemes Agroforestals es_ES
dc.description.bibliographicCitation Pekas, A. (2011). Factors affecting the biological control of California red scale Aonidiella aurantii (Hemiptera: Diaspididae) by Aphytis (Hymenoptera: Aphelinidae) in eastern Spain citrus: host size, ant activity, and adult parasitoid food sources [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/10293 es_ES
dc.description.accrualMethod Palancia es_ES
dc.type.version info:eu-repo/semantics/acceptedVersion es_ES
dc.relation.tesis 3435 es_ES


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