Efficiency of glyphosate and carfentrazone-ethyl in the control of Macroptilium atropurpureum (DC.) Urb. under different light intensities

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dc.creatorGustavo Amaral Costa
dc.creatorLeonardo David Tuffi Santos
dc.creatorSamuel Alves dos Santos
dc.creatorLeandro Roberto da Cruz
dc.creatorBruno Francisco Sant' Anna-Santos
dc.creatorIzabela Thais Santos
dc.creatorFrancisco André Ossamu Tanaka
dc.date.accessioned2023-05-29T20:11:08Z
dc.date.accessioned2025-09-08T23:32:27Z
dc.date.available2023-05-29T20:11:08Z
dc.date.issued2020
dc.identifier.doihttps://doi.org/10.1016/j.sajb.2020.02.028
dc.identifier.issn0254-6299
dc.identifier.urihttps://hdl.handle.net/1843/54112
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofSouth African Journal of Botany
dc.rightsAcesso Aberto
dc.subjectFolhas - Anatomia
dc.subjectMicroscopia eletronica de varredura
dc.subjectHerbicidas
dc.subjectErva daninha
dc.subject.otherLeaf anatomy
dc.subject.otherScanning electron microscopy
dc.subject.otherEpicuticular wax
dc.subject.otherHerbicide mixture
dc.subject.otherLight restriction
dc.titleEfficiency of glyphosate and carfentrazone-ethyl in the control of Macroptilium atropurpureum (DC.) Urb. under different light intensities
dc.typeArtigo de periódico
local.citation.epage309
local.citation.spage302
local.citation.volume131
local.description.resumoVariation in environmental conditions, such as light availability, can affect herbicide efficacy by altering leaf morphoanatomy. Accordingly, the aim of the present study was to evaluate the influence of light level and herbicide application on leaf anatomy and herbicide efficacy, using Macroptilium atropurpureum as a model weed species. The experiment involved a factorial design (3 £ 4), using three light levels (0, 50, or 70% shadow) and four herbicide treatments (no herbicide, glyphosate, carfentrazone-ethyl, or a combination of glyphosate and carfentrazone-ethyl). When combined, the herbicides were efficient in controlling M. atropurpureum under all light levels. However, when applied independently, the herbicides failed to satisfactorily control plants cultivated in full sunlight, and plants cultivated in shaded environments were more sensitive to glyphosate application than those cultivated in full sunlight. The greater efficacy of the herbicides on plants grown under shaded conditions can likely be attributed to changes in leaf morphoanatomy. Plants grown under restricted light conditions exhibit greater average leaf area, lower trichome density, reduced epicuticular wax deposition, thinner leaves, and lower dry mass accumulation, characteristics which are closely correlated to chemical control. The combination of the herbicides presents an additional effect in the control of M. atropurpureum. Also, changes in leaf anatomy caused by light restriction reduce the tolerance of M. atropurpureum to the herbicides.
local.publisher.countryBrasil
local.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0254629919302650

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