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Metalaxyl-M, phosphorous acid and potassium silicate applied as soil drenches show different chestnut seedling performance and protection against Phytophthora root rot

2021Journal article Open access
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dc.contributor.authorRosário, Jorge Nuno
dc.contributor.authorCoelho, Valentim
dc.contributor.authorRodrigues, M.A.
dc.contributor.authorRaimundo, Soraia
dc.contributor.authorAfonso, Sandra
dc.contributor.authorArrobas, Margarida
dc.contributor.authorGouveia, Maria Eugénia
dc.date.accessioned2018-02-19T10:00:00Z
dc.date.accessioned2021-11-23T09:40:02Z
dc.date.available2018-01-19T10:00:00Z
dc.date.available2021-11-23T09:40:02Z
dc.date.issued2021
dc.description.abstractThe application as soil drenches of three commercial products containing metalaxyl, phosphorous acid or potassium silicate, were studied as a means of controlling Phytophthora in chestnut (Castanea sativa Mill.) seedlings. In the metalaxyl treatment no plant deaths were recorded, whereas with the phosphorous acid and potassium silicate applications, and in the untreated control, the mortality rate was respectively 33.3, 44.4 and 77.8%. The presence of Phytophthora was detected in plants and soils at the end of the experiment which means that the three products did not eliminate the pathogen, and that they only gave temporary protection to the plant. In the treatments receiving metalaxyl or phosphorous acid, the plants showed a sharp drop in growth compared to the surviving plants of the control. Soil analyses revealed a high increase in exchangeable acidity, a high reduction in pH and a high increase in Mn levels in the soils treated with the products containing metalaxyl or phosphorous acid. In these treatments, elemental tissue analysis and nutrient recovery by plants revealed Mn levels far above the upper limit of the sufficiency range, with the toxicity of Mn being the suspected cause for the strong reduction in plant growth. These results indicate that when applying such products to the soil, their concentration and/or their ability to influence the soil pH should be evaluated and adequate measures of pH adjustment undertaken. In the case of phosphorous acid, its use can be replaced by phosphite salts. K-silicate did not show adverse effects on plant growth but provided less protection against Phytophthora than metalaxyl or phosphorous acid.en_EN
dc.description.sponsorshipThis research was funded by the Foundation for Science and Technology (FCT, Portugal) and FEDER under Programme PT2020 for financial support to CIMO (UIDB/00690/2020). The research was integrated in the activities of the Operational Group EGIS – Estratégias de Gestão Integrada do Solo e da Água em Espécies Produtoras de Frutos Secos, and Operational Group Biochetnut IPM, funded by PT2020 and EAFRD (European Agricultural Fund for Rural Development).
dc.description.versioninfo:eu-repo/semantics/publishedVersionen_EN
dc.identifier.citationRosário, Jorge Nuno; Coelho, Valentim; Rodrigues, M. Ângelo; Raimundo, Soraia; Afonso, Sandra; Arrobas, Margarida; Gouveia, M. Eugénia (2021). Metalaxyl-M, phosphorous acid and potassium silicate applied as soil drenches show different chestnut seedling performance and protection against Phytophthora root rot. European Journal of Plant Pathology. ISSN 0929-1873. 161:1, p. 147-159en_EN
dc.identifier.doi10.1007/s10658-021-02309-5en_EN
dc.identifier.issn0929-1873
dc.identifier.urihttp://hdl.handle.net/10198/24298
dc.language.isoeng
dc.peerreviewedyesen_EN
dc.relationMountain Research Center
dc.subjectCastanea sativaen_EN
dc.subjectInk disease, biostimulantsen_EN
dc.subjectMolecular identificationen_EN
dc.subjectPhosphiteen_EN
dc.subjectPhosphonateen_EN
dc.subjectPlant protectionen_EN
dc.titleMetalaxyl-M, phosphorous acid and potassium silicate applied as soil drenches show different chestnut seedling performance and protection against Phytophthora root roten_EN
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMountain Research Center
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00690%2F2020/PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameCoelho
person.familyNameRodrigues
person.familyNameRaimundo
person.familyNameAfonso
person.familyNameArrobas
person.familyNameGouveia
person.givenNameValentim
person.givenNameManuel Ângelo
person.givenNameSoraia
person.givenNameSandra
person.givenNameMargarida
person.givenNameMaria Eugénia
person.identifier2791107
person.identifier.ciencia-id0618-49BC-EACE
person.identifier.ciencia-id371D-DF0D-8D68
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person.identifier.ciencia-idEE17-E2A7-CA4D
person.identifier.ciencia-id971C-B85B-1EC0
person.identifier.orcid0000-0001-5829-7669
person.identifier.orcid0000-0002-5367-1129
person.identifier.orcid0000-0002-6505-1445
person.identifier.orcid0000-0002-2464-8464
person.identifier.orcid0000-0002-4652-485X
person.identifier.orcid0000-0002-2550-9108
person.identifier.ridO-1721-2016
person.identifier.ridHNC-5440-2023
person.identifier.scopus-author-id26533798200
person.identifier.scopus-author-id35270106800
person.identifier.scopus-author-id56033752100
person.identifier.scopus-author-id8575728800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccessen_EN
rcaap.typearticleen_EN
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