Seletividade de herbicidas em espécies de gramas ornamentais

Monquero, Patrícia Andréa; Filho, José Miguel; Gutierrez, Aline Baldini; Barbosa, Lincon Nunes

doi:10.7824/rbh.v11i3.171

Cited by 2 publications

(5 citation statements)

References 8 publications

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“…The observed tolerance could be due to the narrow and short morphology of the Emerald grass leaves, which causes the retention of herbicides (CHRISTOFFOLETI; ARANDA, 2001). Similar results were obtained by Monquero et al (2012) and Costa et al (2010a) for the herbicides tested here, in which the esthetic beauty and the green color of the grass were retained, and full recovery occurred before 35 DAA.…”

Section: Resultssupporting

confidence: 72%

“…The results for the percentage phytotoxicity and dry mass of shoots were subsequently subjected to analysis of variance, and the treatment means were compared by Tukey's test using a 5% probability (p> 0.05) (PIMENTEL-GOMES, 1976). …”

Section: Marques R P Et Almentioning

confidence: 99%

“…The mean values of 15 quantitative leaf anatomical features of the keel area and Emerald grass wing after treatment with the herbicides were subjected to a multivariate analysis consisting of a statistical cluster analysis (SNEATH; SOKAL, 1973); the treatment means were compared by Tukey's test using a 5% probability (p> 0.05) (PIMENTEL-GOMES, 1976).…”

Section: Marques R P Et Almentioning

confidence: 99%

“…The use of non-selective herbicides can injure lawns and hinder the establishment of lawn areas, thus, lawns tend to have increasing problems with weeds (MONQUERO et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Leaf anatomy of emerald grass submitted to quantitative application of herbicides

Marques

Martins

Rodella

et al. 2016

SCA

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The aim of this work was to evaluate the selectivity of herbicides applied in post-emergence on Zoysia japonica Steud (Poaceae) and determine associations with the leaf anatomy of this grass. The experimental design was randomized blocks with four replications. The treatments were the application of the herbicides bentazon (720 g ha -1 ), nicosulfuron (50 g ha -1 ), halosulfuron (112.5 g ha -1 ), oxadiazon (875 g ha -1 ) and 2.4-D (698 g ha -1 ), plus a control treatment without herbicide application. Phytotoxicity was assessed every seven days after application (DAA) of the herbicides until the symptoms disappeared. Foliar anatomical analyses of the leaves in the collected grass were conducted until the 35 th DAA. The quantitative characters of the keel and wing region of the blade of Z. japonica were assessed, as well as the biometric characters, which were submitted to an analysis of variance F test, and the averages were compared by Tukey's test at a probability of 5%. The values of the anatomical characters of the foliar blade were tested by cluster analysis. The application of herbicides did not negatively influence the height of the plants but did reduce their dry mass. Toxic symptoms disappeared after 21 DAA, with the only symptoms of injury observed in plants treated with the herbicides oxadiazon and nicosulfuron. In addition, the cluster analysis indicated the formation of a unique discriminatory group. Thus, the results show that the herbicides applied to Z. japonica were selective for the species. Key words: Plant anatomy. Lawns. Selectivity. Zoysia japonica. ResumoObjetivou-se com esse trabalho avaliar a seletividade de herbicidas aplicados em pós-emergência sobre grama Esmeralda -Zoysia japonica Steud (Poaceae), em associação com estudos da anatomia foliar dessa grama. O delineamento experimental foi em blocos ao acaso, com quatro repetições. Os tratamentos constituíram da aplicação dos herbicidas: bentazon (720 g ha -1 ), nicosulfuron (50 g ha -1 ), halosulfuron (112,5 g ha -1 ), oxadiazon (875 g ha -1 ) e 2,4-D (698 g ha -1 ), além de um tratamento controle, sem aplicação de herbicidas. As avaliações de fitointoxicação foram realizadas a cada sete dias após a aplicação dos herbicidas (DAA) até o desaparecimento dos sintomas. Realizaram-se análises anatômicas foliares da grama coletando-se folhas no 35 o DAA. Avaliaram-se os caracteres quantitativos da região da quilha e da asa do limbo de Z. japonica, bem como os caracteres biométricos da grama, os quais foram

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Section: Resultssupporting

confidence: 72%

Section: Marques R P Et Almentioning

confidence: 99%

Section: Marques R P Et Almentioning

confidence: 99%

“…The use of non-selective herbicides can injure lawns and hinder the establishment of lawn areas, thus, lawns tend to have increasing problems with weeds (MONQUERO et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Leaf anatomy of emerald grass submitted to quantitative application of herbicides

Marques

Martins

Rodella

et al. 2016

SCA

View full text Add to dashboard Cite

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“…Growth regulators and herbicides have been tested at subdoses with the goal to inhibit the growth of some grass species, in order to avoid or delay the cutting operation (Monquero et al, 2012;Marchi et al, 2013). However, there are some difficulties in inhibiting the grass growth without affecting the green color of the species.…”

Section: Introductionmentioning

confidence: 99%

Crescimento e teor de pigmentos de Paspalum notatum em resposta a aplicação de herbicidas

et al. 2017

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A grama batatais (Paspalum notatum) é uma poacea, resistente ao pisoteio, restrição hídrica e baixa fertilidade do solo, porém, exige cortes frequentes para eliminar o excesso de biomassa produzido. Para inibir o crescimento dos gramados e evitar ou retardar a operação de corte, têm sido testados reguladores de crescimento e herbicidas. O objetivo do trabalho foi avaliar o potencial de três herbicidas como reguladores de crescimento em grama batatais, e sua influência no crescimento e teor de pigmentos cloroplastídicos. O delineamento experimental foi em blocos casualizados, em esquema de parcelas subdivididas, com três herbicidas (glyphosate, isoxaflutole e tembotrione) e cinco doses (0, 68, 136, 272, 544 g e.a. ha-1; 0, 24, 48, 96, 192 g i.a. ha-1 e 0, 13, 26, 52, 104 g i.a. ha-1), respectivamente, com quatro repetições. Foram avaliadas as características, fitointoxicação, massa seca, altura do gramado e teor de pigmentos cloroplastídicos. Os dados foram submetidos a análise de variância e, quando constatada significância, foi realizado o teste de regressão até segundo grau separadamente para cada herbicida. Os herbicidas demonstram eficiência no controle do porte do gramado, no entanto, constata-se efeito fitotóxico com o incremento das doses e o prejuízo no o aspecto estético do gramado. O isoxaflutole possui maior potencial para ser utilizado com redutor de crescimento para a grama batatais, devido à baixa dose necessária para reduzir a altura e a pouca fitointoxicação. O teor de pigmentos cloroplastídicos é alterado de maneira singular por cada herbicida utilizado, e têm relação direta com a massa seca das folhas.

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Seletividade de herbicidas em espécies de gramas ornamentais

Cited by 2 publications

References 8 publications

Leaf anatomy of emerald grass submitted to quantitative application of herbicides

Leaf anatomy of emerald grass submitted to quantitative application of herbicides

Crescimento e teor de pigmentos de Paspalum notatum em resposta a aplicação de herbicidas

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