Glyphosate has low toxicity to citrus plants growing in the field

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dc.contributor.authorGravena, Renan
dc.contributor.authorVictoria Filho, Ricardo
dc.contributor.authorAlves, Pedro Luis C. A.
dc.contributor.authorMazzafera, Paulo [UNESP]
dc.contributor.authorGravena, Adriana R.
dc.contributor.institutionGravena Ltd
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:13:13Z
dc.date.available2014-05-20T13:13:13Z
dc.date.issued2012-01-01
dc.description.abstractGravena, R., Filho, R. V., Alves, P. L. C. A., Mazzafera, P. and Gravena, A. R. 2012. Glyphosate has low toxicity to citrus plants growing in the field. Can. J. Plant Sci. 92: 119-127. There has been controversy over whether glyphosate used for weed management in citrus fields causes significant toxicity to citrus plants. Glyphosate may be toxic to non-target plants exposed to accidental application or drift. This work evaluated glyphosate toxicity in plants of Valencia citrus (Citrus sinensis. L. Osbeck) grafted onto 'Rangpur lime' (Citrus limonia L. Osbeck) and citrumelo 'Swingle' (Poncirus trifoliata (L.) Raf x Citrus paradisi Mad) by trunk- or foliar-directed herbicide applications under field conditions. In the first experiment, glyphosate was sprayed at rates of 0, 90, 180, 260, 540, 1080 and 2160 g a.e. ha(-1) directly on the trunk to a height of 5 cm above the grafting region. In the second experiment, glyphosate was sprayed on the plant canopies at rates of 0, 0.036, 0.36, 3.6, 36, 360 and 720 g a.e. ha(-1). There was no visual damage caused by glyphosate applied directly to the trunk, but the plants were affected by glyphosate sprayed directly on the canopies at rates over 360 g a.e. ha(-1). The main symptom was observed in the new shoots formed after the application, indicating an effect on meristems. Little or no effect was observed in mature leaves. Eight days after application the levels of shikimate, total free amino acids and total phenolic compounds were unaffected. All plants affected by glyphosate recovered between 6 and 12 mo after the treatments. Therefore, despite some transient symptoms Valencia citrus grafted onto 'Rangpur lime' and citrumelo 'Swingle' were tolerant to glyphosate.en
dc.description.affiliationGravena Ltd, BR-14870990 Jaboticabal, SP, Brazil
dc.description.affiliationUniv São Paulo, ESALQ, Dept Prod Vegetal, BR-05508 São Paulo, Brazil
dc.description.affiliationUniv Estadual Campinas UNCAMP, Inst Biol, Dept Fisiol Vegetal, Campinas, Brazil
dc.description.affiliationUniv Estadual Paulista UNESP, FCAV, Dept Biol Aplicada Agr, Jaboticabal, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista UNESP, FCAV, Dept Biol Aplicada Agr, Jaboticabal, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent119-127
dc.identifierhttp://dx.doi.org/10.4141/CJPS2011-055
dc.identifier.citationCanadian Journal of Plant Science. Ottawa: Agricultural Inst Canada, v. 92, n. 1, p. 119-127, 2012.
dc.identifier.doi10.4141/CJPS2011-055
dc.identifier.issn0008-4220
dc.identifier.urihttp://hdl.handle.net/11449/1074
dc.identifier.wosWOS:000300472800013
dc.language.isoeng
dc.publisherAgricultural Inst Canada
dc.relation.ispartofCanadian Journal of Plant Science
dc.relation.ispartofjcr0.873
dc.relation.ispartofsjr0,383
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCitrus limoniaen
dc.subjectCitrus paradisien
dc.subjectCitrus sinensisen
dc.subjectPoncirus trifoliateen
dc.subjectAmino acidsen
dc.subjectGrowthen
dc.subjectshikimateen
dc.subjecttotal free phenolicsen
dc.titleGlyphosate has low toxicity to citrus plants growing in the fielden
dc.typeArtigo
dcterms.licensehttp://www.aic.ca/journals/cjps_instructions.cfm
dcterms.rightsHolderAgricultural Inst Canada
unesp.author.orcid0000-0003-2348-2121[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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