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Effect of host tree density and apparency on the probability of attack by the pine processionary moth

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorREGOLINI, Margot
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorCASTAGNEYROL, Bastien
hal.structure.identifierInstitut Polytechnique LaSalle Beauvais
dc.contributor.authorDULAURENT MERCADAL, Anne-Maïmiti
hal.structure.identifierDépartement de la Santé des Forêts
dc.contributor.authorPIOU, Dominique
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorSAMALENS, Jean-Charles
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorJACTEL, Herve
dc.date.issued2014
dc.identifier.issn0378-1127
dc.description.abstractEnThe pine processionary moth (PPM, Thaumetopoea pityocampa) is the main defoliator of pines in the Mediterranean area, necessitating constant surveillance and regular pest management. A sound understanding of the spatial distribution of infested trees, both within and between stands, is required to increase management efficiency. We hypothesized that both host tree density at stand scale and tree apparency at individual tree scale were responsible for between- and within-stand patterns of PPM infestation. We tested these hypotheses on a sample of 171 maritime pine stands in the Landes de Gascogne, the largest plantation forest in Europe. We showed that PPM infestation (percentage of infested trees) decreased significantly with stand density, and was therefore greater in older than in younger stands. The probability of a pine tree being attacked increased significantly with tree height and proximity to the edge of the stand. Mortality rates of exposed sentinel egg batches did not differ with distance from the stand edge. We discuss three likely explanations for higher infestation of taller trees at stand edges: better survival of larvae on sun-exposed trees, and random interception vs. active host selection by gravid females. Our findings suggest that stand management could be adapted in order to decrease the risk of damage by the pine processionary moth, and that predictive tools for infestation dynamics can be based on forest growth models.
dc.language.isoen
dc.publisherElsevier
dc.subjectplantation forest
dc.subjectpest insect
dc.subject.enthaumetopoea pityocampa
dc.subject.enedge
dc.subject.enhost selection
dc.title.enEffect of host tree density and apparency on the probability of attack by the pine processionary moth
dc.typeArticle de revue
dc.identifier.doi10.1016/j.foreco.2014.08.038
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalForest Ecology and Management
bordeaux.page185–192
bordeaux.volume334
bordeaux.peerReviewedoui
hal.identifierhal-02637746
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02637746v1
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