The light intensity in the cultivation environment and the impact of glyphosate on plants of the Urochloa genus

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dc.creatorVictor Augustus Vasconcelos de Oliveira
dc.creatorLuan Mateus Silva Donato
dc.creatorMurilo Antônio Oliveira Ruas
dc.creatorJosé Ângeles Moreira de Oliveira
dc.creatorRichardson Fernandes de Souza
dc.creatorLeonardo David Tuffi Santos
dc.date.accessioned2025-07-28T12:56:06Z
dc.date.accessioned2025-09-09T01:07:16Z
dc.date.available2025-07-28T12:56:06Z
dc.date.issued2024-07-22
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.doihttps://doi.org/10.1080/03601234.2024.2381934
dc.identifier.issn1532-4109
dc.identifier.urihttps://hdl.handle.net/1843/83869
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Environmental Science and Health, Part B
dc.rightsAcesso Restrito
dc.subjectGramínea
dc.subjectPlantas - Efeito dos herbicidas
dc.subjectPlantas - Efeito da radiação solar
dc.titleThe light intensity in the cultivation environment and the impact of glyphosate on plants of the Urochloa genus
dc.typeArtigo de periódico
local.citation.epage549
local.citation.issue8
local.citation.spage540
local.citation.volume59
local.description.resumoThe variation in light within the environment triggers morphophysiological changes in plants and can lead to distinct responses in sun-exposed or shaded plants to glyphosate. The response of Urochloa genotypes subjected to desiccation with 2160, 1622.4, 1080, 524.4, 273.6, and 0.0 g ha−1 of glyphosate was evaluated in full sun and shade conditions. Cayana grass, mulato II grass, and sabiá grass – hybrids recently launched on the market, in addition to palisade grass and congo grass were evaluated. Under full sun, we achieved control of congo grass using 1080 g ha−1 of glyphosate, while the other grasses required 2160 g ha−1. In the low-light environment, sabiá grass was effectively controlled with 524.4 g ha−1 of glyphosate, but the other grasses needed 273.6 g ha−1. In shading, compared to full sun, the savings with glyphosate were 75 and 76% for the control of congo grass and sabiá grass, respectively, and 87% for palisade grass, mulato II grass and cayana grass. Increasing glyphosate doses leads to a decline in the quantum efficiency of photosystem II and in the electron transport rate, especially in the shade. Urochloa genotypes are more sensitive to glyphosate in the shade, which must be considered when determining the herbicide dose.
local.publisher.countryBrasil
local.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS
local.publisher.initialsUFMG
local.url.externahttps://www.tandfonline.com/doi/full/10.1080/03601234.2024.2381934

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