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| Registros recuperados: 221 | |
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| Pereira,M.R.R.; Martins,D.; Souza,G.S.F.; Rodrigues-Costa,A.C.P.; Klar,A.E. |
| This project aimed to relate the control efficiency of ACCase inhibiting herbicides applied post-emergence to Digitaria horizontalis plants under different soil water contents. The experiments were conducted in a greenhouse, with the application of three different herbicides (fluazifop-p-butyl, haloxyfop-methyl, and sethoxydim + mineral oil Assist). The experimental design used for each herbicide was completely randomized, with four replications, consisting of a 3 x 4 factorial, with the combination of water management strategies (-0.03, -0.07 and -1.5 MPa) and four doses of these products (100%, 50%, 25%, and 0% of the recommended dose). Herbicide application was made at two vegetative stages, 4-6 leaves and 2-3 tillers. The visual phytotoxicity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crabgrass; Chemical control; Water restriction; Weed. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000100019 |
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| MARQUES,A.S.; MARCHI,S.R.; PINHEIRO,G.H.R.; MARQUES,R.F.; MARTINS,C.C.. |
| ABSTRACT: Razor grass (Paspalum virgatum L) is one weed that has gain importance because of its high seed production capability, mainly when pasture fields need to be renewed. Understanding seedling emergence behavior is crucial to devise strategies to manage this weed. This trial was carried out to evaluate the emergence pattern of razor grass seedlings on the basis of seed depth in the soil profile. The experiment was conducted in a green-house in a completely randomized design, with six replications. The treatments performed in a 11 x 3 factorial arrangement: eleven seeding depths (surface, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 and 10.0 cm) by three ecotypes (Rondonópolis, Redenção and Cacoal, Brazil). The effect of origin and seed depth was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Paspalum virgatum; Ecotype; Weed; Pasture; Emergence pattern. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100178 |
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| Bianco, Silvano; UNESP; Bianco, Matheus Saraiva; UNESP; Carvalho, Leonardo Bianco de; UNESP. |
| Com o objetivo de obter uma equação matemática que, por meio de parâmetros lineares dimensionais das folhas, permita a estimativa da área foliar de Ageratum conyzoides, estudaram-se relações entre a área foliar real (Sf) e parâmetros dimensionais do limbo foliar, como o comprimento ao longo da nervura principal (C) e a largura máxima (L) perpendicular à nervura principal, em 200 limbos foliares. Foram utilizados os modelos estatísticos: linear Y = a + bx; linear simples Y = bx, geométrico Y = axb e exponencial Y = abx. Os modelos estatísticos lineares, exponenciais e geométricos obtidos podem ser usados para estimação da área foliar do mentrasto. Do ponto de vista prático, sugere-se optar pelo modelo linear simples, envolvendo o produto C*L, com... |
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Palavras-chave: 5.01.00.00-9 Agronomia planta daninha; Análise de crescimento; Mentrasto. growth analysis; Weed; Billygoat weed. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5311 |
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| GAZZIERO, D. L. P.; YORINORI, J. T.. |
| Euphorbia heterophylla, conhecida como amendoin-bravo ou leiteiro, e uma planta anual que infesta principalmente culturas de verao como soja, milho e outras. Reproduz-se por sementes, que se mantem viaveis por varios anos e emergem de profundidades superioes a 10cm. Sua expansao ocorreu principalmente na cultura da soja por ser de dificil controle. E uma planta suscetivel a varias doencas que a infectam naturalmente, como o mosaico (Euphorbia Mosaic-EMV), a ferrugem (Uromyces euphorbia CKe.etPK), a verrugose (Sphaceloma krugii), a mancha foliar de Helminthosporium euphorbiae), o cancro de Altemaria (Altemaria sp), a podridao branca (Sclerotinia selerotiorum) e o oidio (Microsphaeria euphorbiae). A ocorrencia destas doencas geralmente se da a partir de... |
| Tipo: Folhetos |
Palavras-chave: Planta daninha; Brasil; Weed; Controle Biológico; Euphorbia Heterophylla; Brazil; Biological control. |
| Ano: 1993 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/445388 |
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| Royo-Esnal,Aritz; López,María Luisa. |
| Oxalis latifolia is a widely distributed weed that mainly affects corn fields, orchards, plant nurseries and gardens. Two forms of the weed have been identified: the common form, with fish-tailed leaflets, bulbils growing on stolons and dark pink flowers, and the Cornwall form, with rounder leaflets, sessile bulbils and whitish-pale pink flowers. In this study, the fresh matter production, expressed as the increase of the bulbs' fresh weight, of both forms was compared during two growing seasons in two locations. The bulbs were grown in pots from spring to autumn, and different aspects of growth were measured at the end of each season. The total fresh matter production, weight of the apical bulb, total weight of the lateral bulbs and number of lateral... |
| Tipo: Journal article |
Palavras-chave: Bulb; Climate; Oxalis; Soil conditions; Weed. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000200007 |
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| SILVA,E.M.; PEREIRA,J.C.; FERREIRA,V.M.; SOUZA,R.C.. |
| ABSTRACT: The objective of the present work was to study the influence of temperature and light on germination of seeds of Stigmaphyllon blanchetii, popularly known as rat tail. The first stage of the research evaluated the effect of three constant temperatures (20 oC, 25 oC and 30 oC) and an alternating temperature (20-30 oC). In the second stage, for simulation of different types of light, four conditions of luminosity (white, red, far red and absence of light) were used. The temperatures that provided the best germination and development for S. blanchetii are the constant (30 oC) and the alternating (20-30 oC) ones. The seeds germinated both in the presence and absence of light, but there was greater germination and seedling development in the absence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weed; Stigmaphyllon blanchetii; Photoblastism; Phytochrome. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100184 |
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| Bianco,S.; Carvalho,L.B.; Bianco,M.S.. |
| A greenhouse trial was carried out from November 1995 to April 1996 at FCAV/UNESP, Brazil, aiming to study the dry matter production and the accumulation and distribution of macronutrients in Solanum americanum, an important weed for annual and perennial crops in Brazil. The plants were grown in seven liter pots with sand substrate, irrigated daily with Hoagland & Arnon nutrient solution. The experimental design was completely randomized with four replicates. The treatments corresponded to evaluation times at 14 day intervals, beginning 21 days after emergence (DAE). In each evaluation, the plants of four pots were analyzed for dry matter production and macronutrient content. S. americanum had a small dry matter and macronutrient accumulation at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weed; American black nightshade; Dry matter; Macronutrients. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000200008 |
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| SILVA, D. R. O.; AGOSTINETTO, D.; VARGAS, L.; LANGARO, A. C.; DUARTE, T. V.. |
| Biótipos de buva resistentes aos herbicidas podem apresentar menor habilidade competitiva, comparado com o biótipo suscetível, quando em convivência com a cultura da soja. Os objetivos deste trabalho foram avaliar a habilidade competitiva de soja com biótipos de buva, resistente e suscetível ao herbicida glyphosate, e identificar as alterações no metabolismo secundário e danos celulares em função da competição. Foram realizados três experimentos em casa de vegetação, em delineamento inteiramente casualizado com quatro repetições, sendo o primeiro conduzido em série aditiva e os demais em série de substituição, com população de 315 plantas m-2. As variáveis avaliadas foram estatura, área foliar, massa seca, fenóis totais, peroxidação lipídica e... |
| Tipo: Artigo de periódico |
Palavras-chave: Soybean; Weed; Planta daninha; Buva; Competição; Série de substituição; Competition; Hairy fleabane; Replacement series.; Glycine Max.. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1005083 |
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| CERVEIRA JR.,W.R.; SILVA,A.F.; CRUZ,C.; PITELLI,R.A.; MARTINS,D.. |
| ABSTRACT: The aim of this study was to evaluate the effectiveness of glyphosate, 2,4-D, and diquat to control the aquatic macrophytes Brachiaria subquadripara, Hedychium coronarium, and Myriophyllum aquaticum under greenhouse conditions. The following herbicides and doses were used: glyphosate at 240, 720, 1,680, 2,640, 3,600, and 4,320 g a.e. ha-1, 2,4-D at 335, 1,005, 1,675, 2,345, and 3,015 g a.e. ha-1, diquat at 100, 200, 300, 400, 500, and 600 g a.i. ha-1, and a control with 10 replications. Sprayings were applied with a CO2-pressurized backpack sprayer at a constant pressure of 172.36 KPa, tips DG 11002, and spray solution consumption of 200 L ha-1. The effectiveness of control was evaluated visually at 3, 7, 15, 21, 30, 45, and 60 days after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical management; Aquatic plant; Weed; Aquatic environment. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100278 |
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| Registros recuperados: 221 | |
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