Desenvolvimento de gramados submetidos à aplicação de retardadores de crescimento em diferentes condições de luminosidade

Maciel, Cleber Daniel de Góes; Poletine, Juliana Parisotto; Raimondi, Michel Alex; Rodrigues, M.; Ribeiro, R.B.; Costa, Rejane Silva; Maio, Raffaele

doi:10.1590/s0100-83582011000200016

Cited by 17 publications

(17 citation statements)

References 24 publications

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“…Table 4 that the application of trinexapac-ethyl reduced the average height of Bermuda grass (Cynodon dactylon), which reached values close to 50%, and all doses were effective and similar. These results corroborate those found by McCullough et al (2007), Costa et al (2009) andMaciel et al (2011). Regarding the number of flower stems, reductions were observed from the dose of 226 + 226 g ha was applied, that is to say, a reduction of 52%, 70%, 69% and 73%, respectively (Table 4).…”

Section: Resultssupporting

confidence: 88%

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Development of Different Grass Species with the Use of the Growth Regulator Trinexapac-Ethyl

2017

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-The use of synthetic compounds to retard the growth of lawns aims at reducing the number of operations for their maintenance. Thus, the main goal of the present study was to evaluate the effect of different doses of trinexapac-ethyl on the development and rooting of five different grass species. Bahiagrass, St. Augustine grass, Japanese lawn grass, Bermuda grass and, broadleaf carpetgrass were grown in pots of 20 L. The experimental design was completely randomized, with four replications. ) was applied at doses of 113+113, 226+113, 226+226, 452+113, 452+226, 452+452 in a sequential spraying, and also at single doses of 678 and 904. The second application was carried out 14 days after the first. On the day prior to applications all species were cut at 3 cm height. The phytotoxicity evaluations were performed weekly, and evaluations on plant height, number and height of inflorescences, biomass of aerial parts and roots were carried out 35 days after the second application. The trinexapac-ethyl application was effective in inhibiting the development of the Japanese lawn grass, Bermuda grass and broadleaf carpetgrass when applied in sequential doses higher than 226 g ha and, the visual appearance of lawns was not affected. In the case of St. Augustine grass and Bahiagrass species, the growth regulator did not promoted reduction in the growth of both grass species. Keywords: Paspalum notatum, Stenotaphrum secundatum, Zoysia japonica,Cynodon dactylon, Axonopus compressus, plant growth regulator. RESUMO -

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Section: Resultssupporting

confidence: 88%

“…These reductions were higher than those found in the literature (Fagerness and Yelverton, 2001;Beasley et al, 2005;McCullough et al, 2007;Maciel et al, 2011).…”

Section: It Is Observed Incontrasting

confidence: 60%

Development of Different Grass Species with the Use of the Growth Regulator Trinexapac-Ethyl

2017

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“…Bentazon, nicosulfuron, halosulfuron, oxadiazon and 2.4-D are examples of herbicides registered and used on lawn areas in countries, such as in the United States (GROSSMAN, 2009;BROSNAN et al, 2010;BHOWMIK, 2012;MCELROY;MARTINS, 2013). Maciel et al (2011) consider the use of selective herbicides and also promote the suppression of growth without sacrificing the visual quality of lawns. Thus, a need exists for studies that help control programs of weeds in lawns.…”

Section: Introductionmentioning

confidence: 99%

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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“…Studies that examine growth regulators and the dosages of herbicides required for the cultivated grass species are required to broaden the knowledge base of the interaction between lawn selectivity and maintenance, thus enabling efficient and secure recommendations based on scientific data generated under Brazilian conditions. The doses and timings of applications targeting the best growth control should also be evaluated because there are no official and safe recommendations for lawn management through the use of plant regulators for Brazil (RODRIGUES et al, 2004;MACIEL et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Application of herbicides as growth regulators of emerald Zoysia grass fertilized with nitrogen

et al. 2015

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Nitrogen (N) is essential for nutrition and for the maintenance of the intense green color of lawns. However, this element affects shoot growth and, therefore, mowing frequency, which is a key factor of lawn-maintenance costs. Accordingly, this study aimed to evaluate the use of nitrogen fertilization in combination with the use of potential herbicides as growth regulators to promote the maintenance of the high visual (intense green) and nutritional quality of lawns of emerald Zoysia (Zoysia japonica Steud.) grown in Ultisol soil while reducing their leaf growth. The experiment was conducted at the Teaching, Research and Extension Education Farm (Fazenda de Ensino, Pesquisa e Extensão) of São Paulo State University (Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP), Ilha Solteira Campus/ São Paulo (SP), from June/2012 to June/2013. The experimental design consisted of randomized blocks with 20 treatments established in a 5 x 4 factorial arrangement with four replicates, including four herbicides (glyphosate, imazaquin, imazethapyr, and metsulfuron-methyl, applied at doses of 200, 420, 80, and 140 g ha -1 active ingredient (a.i.), respectively) and a control (without herbicide), and four N doses (0, 5, 10, and 20 g m -2 ), split into five applications delivered throughout the year. The following items were evaluated: length, LCI (leaf chlorophyll index), leaf dry matter production and leaf N concentration and the percentage of phytotoxicity on lawn grass shoots. Doses from 10 to 20 g m -2 N provided sufficient N concentrations to maintain the emerald Zoysia. The herbicides metsulfuron-methyl and glyphosate were superior in the control of lawn leaf growth. While the former was phytotoxic, the latter had no effect on the aesthetic quality of the lawn, standing out as an herbicide that may be used at a dose of 200 g ha -1 to regulate the growth of emerald Zoysia. fator do custo de manutenção em gramados. Neste contexto, objetivou-se avaliar a adubação nitrogenada e o uso potencial de herbicidas como reguladores de crescimento em grama esmeralda (Zoysia japonica Steud.), em Argissolo Vermelho, visando manter o gramado com boa qualidade visual (verde intenso) e nutricional bem como reduzir o seu crescimento foliar. O experimento foi conduzido na Fazenda de Ensino, Pesquisa e Extensão da UNESP, Campus de Ilha Solteira/SP, de junho/2012 a junho/2013. Utilizou-se o delineamento em blocos casualizados com 20 tratamentos dispostos num fatorial 5 x 4 com quatro repetições, sendo quatro herbicidas: glyphosate, imazaquin, imazethapyr e metsulfuronmethyl aplicados na dose de, respectivamente, 200, 420, 80 e 140 g ha -1 do ingrediente ativo (i.a.) e a testemunha -sem herbicida; e quatro doses de N: 0, 5, 10 e 20 g m -2 , parceladas em cinco aplicações durante o ano. Avaliaram-se: o comprimento, o índice ICF (índice de clorofila foliar) e a produção de matéria seca das folhas, determinaram-se também a concentração foliar de N e a porcentagem de fitointoxicação da parte aérea do gramado. Doses de 10 a 20 g m ...

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Desenvolvimento de gramados submetidos à aplicação de retardadores de crescimento em diferentes condições de luminosidade

Cited by 17 publications

References 24 publications

Development of Different Grass Species with the Use of the Growth Regulator Trinexapac-Ethyl

Development of Different Grass Species with the Use of the Growth Regulator Trinexapac-Ethyl

Leaf anatomy of emerald grass submitted to quantitative application of herbicides

Application of herbicides as growth regulators of emerald Zoysia grass fertilized with nitrogen

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