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Aggregation pattern, sampling plan, and intervention threshold for Pezothrips kellyanus in citrus groves

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Aggregation pattern, sampling plan, and intervention threshold for Pezothrips kellyanus in citrus groves

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dc.contributor.author Navarro Campos, Cristina es_ES
dc.contributor.author Aguilar Martí, Mª Amparo es_ES
dc.contributor.author García Mari, Ferran es_ES
dc.date.accessioned 2016-05-18T11:06:54Z
dc.date.available 2016-05-18T11:06:54Z
dc.date.issued 2012-02
dc.identifier.issn 0013-8703
dc.identifier.uri http://hdl.handle.net/10251/64311
dc.description.abstract [EN] Pezothrips kellyanus (Bagnall) (Thysanoptera: Thripidae) has recently emerged as an international pest of citrus. It causes severe scarring of the fruit surface and commercial downgrading of fresh fruit production. The goals of this article were to determine the aggregation patterns of P. kellyanus on citrus, to establish an efficient sampling plan to assess their population density, and to develop an environmental economic injury level (EEIL). The study was conducted in 14 citrus groves in Valencia (Spain) during 2008 and in eight citrus groves during 2009. On each grove, population densities of thrips were monitored weekly on citrus flowers and fruitlets during the flowering and fruit setting period. Final damage was determined on developed fruits. Pezothrips kellyanus was the most abundant thrips species, with 73.5% of adults and 92.1% of larvae present, followed by Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), with 18.2 and 3.5%, respectively. First description of first instars of P. kellyanus is provided. Our results prove that thrips show clumped population distributions, with no differences in aggregation parameters between flowers and fruitlets, thrips species, larval stages, or sex of adults. Immature thrips showed a higher aggregation (Taylor's value of b=1.40±0.06) than adults (b=1.19±0.04). Fruit damage by P. kellyanus on developed fruits was strongly correlated with percentage of fruitlets with immature P. kellyanus (r=0.897; n=22). Based on the percentage of fruitlets occupied by immature thrips, the economic injury levels and EEIL were calculated (using chlorpyrifos as insecticide) obtaining values of 7 and 12%, respectively. Insecticide treatments will be necessary if more than 12% of fruitlets are infested by thrips larvae. Constant precision (D=0.25) sampling plans developed show that 200 sample units should be observed in enumerative sampling, and 310 in binomial presence-absence sampling, at population levels of immatures on fruitlets around the EEIL. © 2011 The Authors. Entomologia Experimentalis et Applicata © 2011 The Netherlands Entomological Society. es_ES
dc.description.sponsorship We thank Apostolos Pekas for his useful comments on previous versions of the manuscript. We also thank the citrus producers who provided the orchards for the study. Finally, we are grateful to two anonymous referees for their careful review and helpful comments. The first author was awarded an FPI fellowship from the Universitat Politecnica de Valencia to obtain her PhD degree. en_EN
dc.language Español es_ES
dc.publisher Wiley es_ES
dc.relation.ispartof Entomologia Experimentalis et Applicata es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Citrus thrips es_ES
dc.subject EEIL es_ES
dc.subject EIL es_ES
dc.subject Frankliniella occidentalis es_ES
dc.subject KCT es_ES
dc.subject Larvae description es_ES
dc.subject Monitoring es_ES
dc.subject Sample size es_ES
dc.subject Taylor's power law es_ES
dc.subject Thripidae es_ES
dc.subject Thysanoptera es_ES
dc.subject Abundance es_ES
dc.subject Aggregation behavior es_ES
dc.subject Agricultural production es_ES
dc.subject Assessment method es_ES
dc.subject Chlorpyrifos es_ES
dc.subject Crop damage es_ES
dc.subject Developmental biology es_ES
dc.subject Economic analysis es_ES
dc.subject Environmental monitoring es_ES
dc.subject Evergreen tree es_ES
dc.subject Fruit es_ES
dc.subject Injury es_ES
dc.subject Mathematical analysis es_ES
dc.subject Pest control es_ES
dc.subject Pest species es_ES
dc.subject Plant-herbivore interaction es_ES
dc.subject Population density es_ES
dc.subject Population distribution es_ES
dc.subject Threshold es_ES
dc.subject Thrips es_ES
dc.subject Comunidad Valencia es_ES
dc.subject Spain es_ES
dc.subject Citrus es_ES
dc.subject Frankliniella es_ES
dc.subject.classification PRODUCCION VEGETAL es_ES
dc.title Aggregation pattern, sampling plan, and intervention threshold for Pezothrips kellyanus in citrus groves es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1111/j.1570-7458.2011.01204.x
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Agroforestal Mediterráneo - Institut Agroforestal Mediterrani es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ecosistemas Agroforestales - Departament d'Ecosistemes Agroforestals es_ES
dc.description.bibliographicCitation Navarro Campos, C.; Aguilar Martí, MA.; Garcia Marí, F. (2012). Aggregation pattern, sampling plan, and intervention threshold for Pezothrips kellyanus in citrus groves. Entomologia Experimentalis et Applicata. (142):130-139. doi:10.1111/j.1570-7458.2011.01204.x es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://dx.doi.org/10.1111/j.1570-7458.2011.01204.x es_ES
dc.description.upvformatpinicio 130 es_ES
dc.description.upvformatpfin 139 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.issue 142 es_ES
dc.relation.senia 220678 es_ES
dc.contributor.funder Universitat Politècnica de València es_ES
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