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Distribution, dispersal and biological control of recently introduced pests of sweet chestnut ecosystem in Northwest Portugal

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dc.contributor.authorMoura, Luísa
dc.contributor.authorAmorim, Amaro
dc.contributor.authorFreitas, Mariano
dc.contributor.authorGouveia, Maria Eugénia
dc.contributor.authorRodrigues, Raúl
dc.date.accessioned2020-03-19T10:55:42Z
dc.date.available2020-03-19T10:55:42Z
dc.date.issued2019
dc.description.abstractThe European chestnut agro-ecosystem is of high social, economic, and landscape importance in Portugal, being actually very debilitated by alien and invasive pests. Cryphonectria parasitica associated to Chestnut Blight, and the Asian chestnut gall wasp, Dryocosmus kuriphilus are alien and invasive pests recently introduced in Portugal, that rapidly spread to all important chestnut areas with consequent chestnut production losses. To manage C. parasitica and D. kuriphilus, biological control was implemented. For Chestnut Blight, hypovirulent strains (CHV1) was applied, and the parasitoid Torymus sinensis was introduced to control the chestnut gall wasp. This work describes, in the Minho Region (Northwest Portugal), the population structure related to vic genes (vegetative incompatibility system) of the virulent pathogenic fungus for CHV1 application, and the results of biocontrol of D. kuriphilus by the introduced T. sinensis and native parasitoids. The average percentage of parasitism in 2018 was 9.8%, although it varied across time and the sites studied. In 2019 a higher percentage of 18.74% was observed. The average number of cells per gall in 2018 was 5.94, and 6.3 in 2019. Nine species belonging to the genus Torymus, Megastigmus, Sycophila, Eurytoma, Mesopolobus, Ormyrus and Eupelmus were identified in 2018. The results indicate that native parasitoids are important in the natural limitation of D. kuriphilus, but insufficient for controlling the populations of the chestnut gall wasp. The percentage of parasitism by T. sinensis on D. kuriphilus is still low, as a consequence of its recent introduction in the orchards.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMoura, Luísa; Amorim, Amaro; Freitas, Mariano; Gouveia, Maria Eugénia; Rodrigues, Raúl (2019). Distribution, dispersal and biological control of recently introduced pests of sweet chestnut ecosystem in Northwest Portugal. In XIX International Plant Protection Congress 2019 (IPPC2019). Hyderabadpt_PT
dc.identifier.urihttp://hdl.handle.net/10198/21059
dc.language.isoengpt_PT
dc.peerreviewednopt_PT
dc.publisherThe International Association for the Plant Protection Scientists (IAPPS)pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectCryphonectria parasiticapt_PT
dc.subjectDryocosmus kuriphiluspt_PT
dc.titleDistribution, dispersal and biological control of recently introduced pests of sweet chestnut ecosystem in Northwest Portugalpt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceHyderabadpt_PT
oaire.citation.endPage181pt_PT
oaire.citation.startPage181pt_PT
oaire.citation.titleXIX International Plant Protection Congress 2019 (IPPC2019)pt_PT
person.familyNameGouveia
person.givenNameMaria Eugénia
person.identifier.orcid0000-0002-2550-9108
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication99e4701b-e3c2-4594-a37f-42bd49821d6e
relation.isAuthorOfPublication.latestForDiscovery99e4701b-e3c2-4594-a37f-42bd49821d6e

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