Show simple item record

dc.contributor.authorSousa Ortega, Carlos
dc.contributor.authorRoyo-Esnal, Aritz
dc.contributor.authorDiTommaso, Antonio
dc.contributor.authorIzquierdo i Figarola, Jordi
dc.contributor.authorLoureiro, Iñigo
dc.contributor.authorMarí, Ana Isabel
dc.contributor.authorCordero, Fernando
dc.contributor.authorVargas, Manuel
dc.contributor.authorSaavedra, Milagros
dc.contributor.authorParamio, José Antonio
dc.contributor.authorFernández, José Luis
dc.contributor.authorTorra Farré, Joel
dc.contributor.authorUrbano, José María
dc.date.accessioned2020-05-04T13:43:49Z
dc.date.available2020-09-23T22:24:03Z
dc.date.issued2020
dc.identifier.issn0043-1745
dc.identifier.urihttp://hdl.handle.net/10459.1/68535
dc.description.abstractNorth African knapweed (Centaurea diluta Aiton) is an annual weed that is widespread in southern Spain and is of increasing concern in dryland cropping systems. Despite its expanding range in Spain, there is limited information on the emergence timing and pattern of this species, which is critical for developing more timely and effective management strategies. Therefore, there is a need to develop simple and reliable models to predict the timing and emergence of this annual weed under dryland conditions. A multi-location field experiment was established across Spain in 2016-2017 to assess the emergence of C. diluta. At each of 11 locations, seeds were sown in the fall, and emergence was recorded. Overall emergence averaged 39% in the first year across all sites and 11% in the second year. In both years, the main emergence flush occurred at beginning of the growing season. The three-parameter Weibull function best described seedling emergence of C. diluta. Emergence models were developed based on thermal time (TT) and hydrothermal time (HTT) and showed high predictability, as evidenced by root mean square error prediction (RMSEP) values of 10.8 and 10.7, respectively. The three cardinal points were established for TT and HHT at 0.5 ºC, 10 ºC and 35 ºC for base, optimal and ceiling temperature, while base water potential was estimated at -0.5MPa.
dc.description.sponsorshipWe would like to thank Cátedra Adama and the Spanish Weed Science Society (SEMh) for providing financial support for this project. We are grateful to the many students and technicians who assisted with field work at the different experimental locations. We would like to thank the Spanish Goverment for partial funding, through project AVA 2019.020 "Advances in Technological Research in Winter Cereals: Genetic Improvement and Sustainable Management" financed with FEDER funds (80%). Also, Joel Torra acknowledges support from the Spanish Ministry of Science, Innovation and Universities (grant Ramon y Cajal RYC2018-023866-I).
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherCambridge University Press
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1017/wsc.2020.22
dc.relation.ispartofWeed Science, 2020, vol. 68, núm. 3, p. 268-277
dc.rights(c) Weed Science Society of America, 2020
dc.subjectHydrothermal model
dc.subjectNorth African knapweed
dc.subjectSeedling emergence model
dc.subjectThermal model
dc.subjectWeibull
dc.titleModeling the emergence of North African Knapweed (Centaurea diluta), an increasingly troublesome weed in Spain
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2020-05-04T13:43:49Z
dc.identifier.idgrec029905
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.1017/wsc.2020.22


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record