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| Registros recuperados: 233 | |
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| Santos,Roseane Cavalcanti dos; Ferraz,Gabriela de Morais Guerra; Albuquerque,Manoel Bandeira de; Lima,Liziane Maria de; Melo Filho,Péricles de Albuquerque; Ramos,Alessandra de Rezende. |
| The temporal expression of gene sor1 and the inhibitory effect of Sorghum bicolor L. Moench against weeds were studied by semiquantitative polymerase chain reaction and intercropping management, respectively. To quantify sor1 expression, seeds were sown in pots and RNA was collected from the roots at 5, 10, 15, 20 and 30 days after emergence (DAE). In the inhibition assay, cotton and three weeds were evaluated during single cropping and during intercropping with S. bicolor. The assay was completely randomized, with eight replications. We found early expression of sor1 in most S. bicolor accessions by 5 DAE, and a gradual reduction thereafter. Only one of the accessions showed sor1 expression up to 30 DAE. In the inhibition assay, the most significant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Semiquantitative PCR; Sorgoleone; Weeds. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000300008 |
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| Carvalho, Leonardo Bianco de; FCAV; Pitelli, Robinson Antonio; FCAV; Cecílio Filho, Arthur Bernardes; FCAV; Bianco, Silvano; FCAV; Guzzo, Caio Dória; FCAV. |
| O trabalho teve como objetivo o estudo fitossociológico e a determinação dos períodos críticos de interferência da comunidade infestante na cultura da beterraba transplantada. Os tratamentos consistiram em períodos semanais crescentes de convivência e de controle da comunidade infestante, a partir da segunda semana após o transplante das mudas. A comunidade infestante foi avaliada por meio do número de indivíduos e da massa seca acumulada correspondente, para cada população de planta daninha e período avaliado. A cultura foi colhida 91 dias após o transplante das mudas, quando se avaliou o diâmetro transversal e a produtividade comercial das raízes. As principais plantas daninhas encontradas foram Amaranthus viridis, Coronopus didymus, Galinsoga... |
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Palavras-chave: 5.01.00.00-9 Agronomia Beta vulgaris L.; Períodos críticos de interferência; Plantas daninhas 5.01.02.00-1 Fitossanidade Beta vulgaris L.; Critical interference periods; Weeds. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3508 |
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| Carvalho, Leonardo Bianco; FCAV; Guzzo, Caio Dória; Universidade Estadual Paulista "Júlio de Mesquita Filho"; Pitelli, Robinson Antonio; Universidade Estadual Paulista "Júlio de Mesquita Filho"; Cecílio Filho, Arthur Bernardes; Universidade Estadual Paulista "Júlio de Mesquita Filho"; Bianco, Silvano; Universidade Estadual Paulista "Júlio de Mesquita Filho". |
| The objective was to evaluate the effects of initial weedy periods on the weed community and on the productivity of direct seeded and transplanted table beet cropping systems. A field trial was conducted at São Paulo State University, Brazil, in a randomized complete block design using a 2 x 13 factorial scheme. Direct seeding and seedling transplanting methods were evaluated within thirteen increasing weekly weedy periods. Weed relative importance was calculated and weed density and weed dry matter accumulation data were analyzed by nonlinear regression as well as beet yield and stand, which were submitted to analysis of variance. Amaranthus viridis, Coronopus didymus, Cyperus rotundus, Digitaria nuda, Galinsoga parviflora and Nicandra physaloides were... |
| Tipo: Experimento de campo |
Palavras-chave: 5.01.02.00-1 Beta vulgaris; Weeds; Interference; Direct seeding; Seedling transplanting Matocompetição Beta vulgaris; Weeds; Interference; Direct seeding; Seedling transplanting. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4649 |
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| Al Gazi, Ariel David Freitas; UNESP/Jaboticabal; Gandolfo, Daniel; ARS/Argentina; Pitelli, Robinson Antonio; UNESP/Jaboticabal. |
| Metriona elatior Klug é potencial candidato para o controle biológico de Solanum viarum Dunal (joá-bravo), pois as larvas e adultos se alimentam de suas folhas e têm baixa taxa de dispersão. A especificidade é um forte requisito para a adequabilidade de um organismo como agente de controle biológico, especialmente pela estratégia inundativa. Desse modo, a preferência alimentar do adulto desse inseto em laboratório foi avaliada em 14 híbridos de Solanum melogena Linnaeus (berinjela). A criação estoque foi mantida em laboratório, com os indivíduos se alimentando de folhas do joá-bravo. O estudo foi realizado utilizando-se testes de dupla e múltipla escolha, em períodos de alimentação de 24 e 48h, oferecendo-se discos de tecido foliar, em condições de placas... |
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Palavras-chave: Metriona elatior; Controle biológico; Planta daninha; Preferência alimentar; Berinjela; Joá-bravo. Metriona elatior; Biological control; Weeds; Feeding preference; Eggplant; Tropical soda apple.. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5874 |
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| Hedayatypour, Abolfazl; Goodarzi, Mustafa; Mostafavirad, Marefat. |
| In many agricultural systems around the world, competition of weeds is one of the major factors reducing crop yield. This research was carried out to study the performance of mechanical methods for weed control, mechanical damage, yield and yield components of three bean genotypes in 2012 and 2013 cropping seasons. The experiment carried out as split plot arrangement based on complete block design with three replications in Agricultural and Natural Resources Research and Education Center in Markazi Province, Iran, Arak. The experimental treatments were comprised of three bean lines and varieties including Sadri, KS-21189 and COS16 as main plots and four mechanical methods of weeds control including: sweep type weeder, rotary type weeder, rolling... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomic traits; Bean; Weeds; Weeding performance; Weeding machines; Yield. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6067 |
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| Quezado Duval,A.M.; Henz,G.P.; Paz-Lima,M.L.; Medeiros,A.R.; Miranda,B.E.C.; Pfenning,L.H.; Reis,A. |
| Myrothecium roridum and M. verrucaria are two plant pathogenic species causing foliar spots in a large number of cultivated plants. This paper aims to study the causal agents of foliar spots in vegetable crops (sweet pepper, tomato and cucumber), ornamental plants (Spathiphyllum wallisii, Solidago canadensis, Anthurium andreanum, Dieffenbachia amoena) and a solanaceous weed plant (Nicandra physaloides). Most of the isolates were identified as M. roridum; only the isolate 'Myr-02' from S. canadensis was identified as M. verrucaria. All the isolates were pathogenic to their original plant hosts and also to some other plants. Some fungicides were tested in vitro against an isolate of M. roridum and the mycelial growth recorded after seven days. Fungicides... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Myrothecium roridum; M. verrucaria; Vegetable crops; Ornamentals; Weeds; Etiology. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100034 |
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| Olivares,Elizabeth. |
| Tithonia diversifolia, a ruderal weedy species utilized in agroforestry, is widely distributed in the tropics, often being found in wasteland, margins of polluted city rivers and roadsides. The objective of this study was to compare plants sampled at a light and heavy traffic roadside for metal concentration and foliar compounds which may be related to senescence and/or detoxification of metals. The field survey was followed by an experiment in pots of Pb-acetate-supplemented soil to verify if the same response is obtained under controlled conditions with regard to Pb. The concentration of Pb in leaves and roots of plants sampled at a heavy traffic roadside was higher than in samples from a light traffic site. The content of Cr, Al, Fe, Cu and Ni was also... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Asteraceae; Metals; Mexican sunflower; Phenols; Pollution; Weeds. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000300004 |
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| Naeem,Muhammad; Ata Cheema,Zahid; Ahmad,Azraf-ul-Haq; Wahid,Abdul; Kamaran,Muhammad; Arif,Muhammad. |
| Weeds cause huge losses due to their competition with crops. Intercropping of wheat (Triticum aestivum L.) with canola (Brassica napus L.) under different spatial arrangements was evaluated for their effects on weeds and interaction between the crops at the Agronomic Research Area, University of Agriculture, Faisalabad, Pakistan, during 2009-2010. The treatments included wheat (line sowing), canola (line sowing), wheat (broadcast method), one row of wheat + one row of canola (30 cm apart), two rows of wheat + two rows of canola (45 cm apart), four rows of wheat + four rows of canola (75 cm apart) and mixed cropping of wheat + canola (broadcast method). The results revealed that all intercropping treatments significantly affected weed density and dry weight... |
| Tipo: Journal article |
Palavras-chave: Intercropping; Brassica napus; Triticum aestivum; Weeds. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300019 |
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| Boccanelli,Silvia; Pire,Eduardo; Lewis,Juan. |
| Agriculture has been practised in the Argentine Pampa region for more than a century. This long history of disturbance has strongly modified the native vegetation of the region. Some original species have disappeared or its area has been remarkably reduced. The objective was to evalúate vegetation changes over time after the abandonment of agriculture practice. Our hypothesis was that over time vegetation in this region will evolve towards a "flechillar" (Stipa spp. community) similar to the original vegetation. The experiment was conducted at Zavalla (Santa Fe) Argentina (33° 01' S, 60° 53' W and 50 m.a.s.1.). Vegetation evolution was studied during 15 years (1982-1997) after abandonment, considering four initial crop situations (i.e. wheat, soybean,... |
| Tipo: Journal article |
Palavras-chave: Abandoned field; Agriculture; Disturbance; Secondary succession; Weeds. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200005 |
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| Madanes,Nora; Fernández,Celina A. |
| The aim of this study is to analyze factors and mechanisms involved in dispersal and deposition of airborne pollen captured with Tauber type traps in a 20 x 20 m plot of Helianthus annus cultivation and accompanying weeds and to investigate the relation of these processes with the vegetation structure and dynamics from cultivation to its senescence over a 14 week period. Weekly samples obtained with pollen traps showed a significant change in the deposition due to a filter effect and dispersal patterns due to source variations during the time elapsed. A conceptual and interpretative model for both processes and its relation to pollen sources is proposed. Our results showed that in the study site, the leaves development of Helianthus annus produced a pollen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Airborne pollen; Phenology; Helianthus annus; Weeds. |
| Ano: 2018 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932018000100003 |
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| Guillermo Gómez, María Asunción. |
| Los potreros están cubriendo una proporción cada vez más grande del trópico húmedo de México, mientras el área de selvas y del cultivo de maíz ha ido en descenso. Pero, existe muy poca información sobre la composición florística y ecológica de estos pastizales inducidos. En este trabajo se compara la florística, fitogeografía, diversidad, etnobotánica y usos de la vegetación en milpas y potreros en el municipio de Candelaria, Campeche, entre la población de la etnia chol; además de que se describe el manejo de cada tipo de vegetación (milpa/potrero) con detalle. Se parte de la premisa que las milpas tendrán mayor diversidad, una proporción más grande de especies nativas y útiles, y que son recolectadas en cantidades mayores que los potreros, por ser el... |
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Palavras-chave: Arvense; Diversidad; Cobertura; Frecuencia; Aprovechamientos; Weeds; Diversity; Coverage; Frequency; Uses; Botánica; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2091 |
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| Manduna, Idah Tichaidza. |
| La recolección de plantas comestibles es un componente importante en sistemas de agricultura tradicional. Estas plantas forman parte de las dietas locales. El objetivo de esta investigación fue comparar el conocimiento y uso de plantas comestibles recolectadas que complementan la dieta basada en maíz en comunidades rurales, con el fin de identificar patrones generales en dos poblaciones con condiciones similares, pero sin contactos directos en el pasado. Se recopiló información en Santa Catarina Roatina y Villa Talea de Castro de Oaxaca, México y Chipupuri y Maradzika de Honde Valley, Zimbabwe mediante entrevistas grupales e individuales, diarios de alimentos y observación participante. También se muestrearon los arvenses de cultivos de maíz para... |
| Tipo: Tesis |
Palavras-chave: Conocimiento etnobotánico; Arvenses; Origen biogeográfica; Doctorado; Botánica; Doctorado; Botánica; Ethnobotanical knowledge; Weeds; Biogeographical origins. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1521 |
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| Registros recuperados: 233 | |
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