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| Registros recuperados: 23 | |
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| FONTES, J. R. A.; SHIRATSUCHI, L. S.. |
| RESUMO: Neste trabalho, objetivou-se realizar um levantamento florístico e plantas daninhas em uma lavoura de milho cultivada na primavera-verão em sistema de plantio direto no Cerrado do Estado de Goiás, sendo empregado para isso o método de quadrado inventário. A área amostrada correspondeu a 107,5 ha e foi dividida em grade regular de 50 x 50 m, totalizando 430 pontos. Num raio de 5 m, ao redor de cada ponto, foi lançado aleatoriamente um quadrado de ferro de 50 cm de lado (0,25 metros quadrados), num total de quatro vezes. (1,0 metros quadrados). Os seguintes parâmetros foram calculados: frequência, frequência relativa, densidade, densidade relativa, abundância, abundância relativa e índice de valor de importância. Foram identificadas 23 espécies de... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Planta daninha; Manejo integrado; Identification; Maize; Zero tillage.; Erva Daninha; Identificação; Milho; Plantio Direto; Zea Mays.; Integrated weed management; Weeds.. |
| Ano: 2005 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/544627 |
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| SCHMITZ,M.F.; CECHIN,J.; HENCKES,J.R.; PIASECKI,C.; AGOSTINETTO,D.; VARGAS,L.. |
| ABSTRACT: The intergenotypic competition of tetraploid ryegrass with natural diploid population may be a tool to reduce the frequency of resistant individuals in an area. This study aimed to identify and compare the phenological development, fitness cost, and competitive ability between diploid and tetraploid ryegrass genotypes. Genotypes were grown in pots, and the morphological variables of genotype growth were assessed every 15 days up to 120 days after emergence to evaluate the fitness cost. Phenological development and seed yield components were measured in a single time together with the fitness cost. Competitive ability was determined in a replacement-series experiment with proportions of tetraploid and diploid ryegrass, in which the number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lolium multiflorum; Competition; Diploid; Tetraploid; Integrated weed management. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100189 |
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| El-Metwally,I.M.; Abdelhamid,M.T.. |
| Two field experiments were conducted in two successive seasons, 2005/2006 and 2006/2007, to determine whether management can improve faba bean competitiveness with weeds, thus helping to achieve its yield potential. The experiment included five treatments, composed of organic and mineral fertilizers, alone and mixed at different rates, along with a control and six weed control treatments, including oxadiargyl, prometryn, hand hoeing treatments alone or mixed with the herbicides, and a nonweeded treatment (control).The herbicide treatments were not superior to the two hand-hoeing treatments. Using compost favored growth and yield of faba bean more than of weeds. Adding fertilizer also improved most yield parameters. Application of compost alone or combined... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Faba bean; Integrated nutrient management system; Integrated weed management. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000300014 |
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| PIASECKI,C.; MAZON,A.S.; MONGE,A.; CAVALCANTE,J.A.; AGOSTINETTO,D.; VARGAS,L.. |
| ABSTRACT: Glyphosate-resistant hairy fleabane [Conyza bonariensis (L.) Cronq.] is one of the most important weeds in the world. Among the factors that make this weed species widely distributed in the most diverse environments is the high seed production capacity and dispersal. Hairy fleabane plants not controlled by herbicide application regrowth and overcome crop canopy, use environmental resources, interfere with crops, and complete their life cycle by producing thousands of seeds and replenishing the seed bank. Management strategies that reduce production and viability of hairy fleabane seeds can be adopted within the integrated management to reduce the seed bank and prevent further infestations. In this way, experiments were carried out in a greenhouse... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conyza bonariensis; Resistance; Integrated weed management; Prevention; Soil seed bank. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100198 |
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| VARGAS,L.; HENCKES,J.R.; GAVA,F.; AGOSTINETTO,D.; CARVALHO,I.R.; RAMOS,R.; RODRIGUES,R.. |
| ABSTRACT: Resistance to herbicides is one of the main factors responsible for weed control failures. Once uncontrolled and stressed, resistant weeds demand a new application of herbicides from different modes of action, which results in higher monetary costs and environmental impact. Knowledge of weed sensitivity levels to herbicides before making decisions for their management in the field is paramount to increasing the efficiency of integrated weed management. Thus, methods that allow the rapid determination of sensitivity levels can help to the correct recommendation before the application, and thus, favor the greater technical, economic and environmental efficiency of weed management. The objective of this work was to validate a rapid method to detect... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Integrated weed management; Resistance; Control; Efficiency. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100222 |
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| DEISS,L.; MORAES,A.; PELISSARI,A.; PORFÍRIO-DA-SILVA,V.; SCHUSTER,M.Z.. |
| ABSTRACT : Trees can modify the weed seed bank composition and distribution in the cropped area of an agroforestry system. This study aimed at analyzing the eucalyptus (Eucalyptus dunnii) effect on spatial distribution, functional traits abundance and weed seed bank botanic composition in an agroforestry system under no-tillage in Subtropical Brazil. The experiment was conducted in a randomized block design with five replications, and five positions between 4.5-year-old eucalyptus double rows [(4x3) x 20 m] as treatments. Soil sampling was performed at 0-20 cm and the method to quantify and identify seeds was the seedling emergence in trays, inside a greenhouse. Weed phytosociological indices (relative density, frequency and importance), functional traits... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alley cropping; Phytosociology; Integrated weed management; Integrated crop-livestock systems; Functional traits; Spatial distribution patterns. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100222 |
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| ABBAS,A.; KHALIQ,A.; SAQIB,M.; MAJEED,M.Z.; ULLAH,S.; HAROON,M.. |
| ABSTRACT: Weeds cause considerable damage to rice crop. To ascertain the influence of different weed management practices under different tillage systems, a field experiment was conducted during 2014-15. Experimental design was RCB with split-plot arrangement and with a net plot size of 6 x 2 m. Three tillage systems viz; zero tillage with glyphosate application and conventional tillage with and without stale seed bed, and seven weed management treatments viz; weedy check, manual weeding, oxadiargyl as pre-emergence, pyrazosulfuron as pre-emergence, pyrazosulfuron as post-emergence, fenoxaprop-ethyle + sodium fluoride as post-emergence and fenoxaprop-ethyle + sodium fluoride as post-emergence. Results revealed that all treatments including tillage systems... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa L.; Direct-seeded rice; Tillage systems; Herbicides; Integrated weed management. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100280 |
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| P. Ronchi,Cláudio. |
| Abstract Background: Weed control in the pre-harvest of the coffee crop is essential to enable mechanized coffee harvesting. Objective: Testing the efficacy of pre-emergent herbicides, applied after brush shredder or desiccation operations, on the weed control during the coffee crop’s pre-harvest. Methods: Two separate trials were accomplished in commercial Coffea arabica crops in the Cerrado Mineiro Region. In the first one, oxyfluorfen and sulfentrazone were applied after either brush shredder or burndown operation; in the second, they were tested as a tank mixture with glyphosate. Results: In the first assay, the brush shredder use, associated to the rains that follow, stimulated a sharp weed infestation during the pre-harvest, which was not... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica; Burndown; Herbicide; Integrated weed management. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100329 |
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| BORGES,L.G.M.; MIRANDA,F.R.; BORGES,A.M.; SILVA,J.R.O.; CAMPOS,A.A.V.; RONCHI,C.P.. |
| ABSTRACT: The goal of this study was to analyze the response of Arabica coffee cultivars grown under three levels of Bidens pilosa (beggarticks) interference. At 30 days after transplanting (DAT) of 14 Arabica coffee cultivars into 11 L pots, beggarticks was seeded in the pots and soon after emergence, three levels of weed infestation were established: none, low (two plants per pot), and high (five plants per pot). Treatments were arranged in a 14 × 3 factorial scheme under a completely randomized design, with four replicates. Coffee plant growth was evaluated at both weed emergence and blossoming (90 DAT) when the experiment was completed. Regardless beggarticks infestation levels, significant effects of cultivars occurred on almost all the coffee growth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bidens pilosa; Coffea arabica; Weed competition; Cultural control; Growth; Integrated weed management. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100159 |
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| Beltran, Jesusa C.; Pannell, David J.; Doole, Graeme J.; White, Benedict. |
| This paper describes a complex, dynamic simulation model that has been developed for the analysis of integrated weed management programmes for the control of annual barnyardgrass (Echinochloa crus-galli) in rice farming systems in the Philippines. Users of the model may simulate any feasible combination of 49 weed treatments options across wet and dry cropping seasons over 5, 10, 15, and 20 year periods, subject to a predetermined sequence of planting methods. The main outputs of the model include weed seed and plant densities and seasonal and annualised profit over the simulated planning horizon. Model output emphasises the substantial economic benefits associated with effective long-term weed management strategies. In addition, the most-profitable weed... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Barnyardgrass; Bioeconomic model; Integrated weed management; Rice farming systems.; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management. |
| Ano: 2011 |
URL: http://purl.umn.edu/104637 |
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| Registros recuperados: 23 | |
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