|
|
|
| Registros recuperados: 141 | |
|
|
| ALBUQUERQUE, J. A. S. de; ALBUQUERQUE, T. C. S. de. |
| Dois experimentos foram conduzudos com herbicidas em um vinhedo sob condicoes irrigadas na regiao do Submedio Sao Francisco. Foram, testados diferentes herbicidas e suas combinacoes comparadas a capina manual. Os produtos usados e suas respectivas concentracoes foram os seguintes: Paraquat (0,8 lPA/ha), Paraquat (0,8 lPA/ha) + Diuron (1,0 kg PA/ha); Paraquat (0,8 lPA/ha) + Atrazine (2,0 kg PA/ha), Paraquat (0,8 lPA/ha) + Orizaline (3,0 kg PA/ha); Glyphosate (2,5 l PA/ha), Glyphosate (2,5 lPA/ha) + Diuron (1,0 kg PA/ha). Os resultados obtidos permitiram as seguintes conclusoes: os herbicidas nao causaram efeitos fitotoxicos aparentes nas videiras; uma unica aplicacao de Glyphosate isolado ou combinado com Diuron foi suficiente para que o vinhedo... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Planta daninha; Controle; Nordeste; Submédio São Francisco; Pest; Weed; Control; Grape.; Uva; Herbicida; Praga.; Herbicides.. |
| Ano: 1983 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131340 |
| |
|
|
| Chalak, Morteza; Pannell, David J.. |
| Although there have been numerous studies on the economics of weed control, relatively few of these studies have focused on natural ecosystems. The aims of this papers are: A) to identify the combination of control options that is optimal for blackberry (Rubus anglocandicans) in Australian natural ecosystems, B) to assess whether an integrated control strategy is superior to chemical-only strategies, C) to evaluate the economic net benefits of specific biologically oriented control methods (a rust and grazing by goats), D) to determine how changes in model parameters affect the optimal control strategy. To address these aims, a stochastic dynamic simulation model and a stochastic dynamic programming model are developed. The results indicate that, while an... |
| Tipo: Presentation |
Palavras-chave: Environment; Economics; Weed; Stochastic; Optimisation; Management; Environmental Economics and Policy. |
| Ano: 2012 |
URL: http://purl.umn.edu/124373 |
| |
|
|
| Barros,Renato T. de; Martins,Cibele C.; Silva,Givanildo Z. da; Martins,Dagoberto. |
| ABSTRACT The invasive behavior of beggarticks (Bidens pilosa L.) in cropped areas is due to its ecological adaptation and aggressive regeneration, which is dependent on seed germination. The objective of this research was to verify the effects of B. pilosa seed origin and temperature on seed germination. The seeds were collected in Entre Rios do Oeste, PR, Botucatu, SP, Capão Bonito, SP, São Joaquim da Barra, SP, Sertãozinho, SP, Selvíria, MS, Barra do Garças, MT, Areia, PB and Manaus, AM. The seeds were evaluated regarding moisture content, 1000-seed weight, germination speed index and germination at 60 days (normal seedlings, dormant seeds and dead seeds) at the temperatures of 10, 15, 20, 25, 30, 35, 40, and 45 ºC. The replicates were distributed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bidens pilosa; Weed; Production sites; Dormancy. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000700448 |
| |
|
| |
|
|
| RODRIGUES,D.A.; PEREIRA,G.A.M.; SILVA,A.A.; SANTOS,M.H.; DEMUNER,A.J.; OLIVEIRA,P.M.. |
| ABSTRACT: The great diversity of plant species in pastures of the Brazilian Cerrado with distinct ecophysiological characteristics indicates the possibility of finding, in the cellular content of this flora, chemical compounds with potential for use in agriculture and human and animal health. Three steps are necessary to prove this hypothesis: phytochemical prospecting, characterization of secondary metabolites, and studies on the biological activities of these metabolites present in these plants. The chemical profile of secondary metabolites present in five species of the Brazilian Cerrado (Davilla elliptica, Remijia ferruginea, Luehea paniculata, Anacardium occidentale, and Acosmium dasycarpum) was traced in this research. These plant species were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Secondary metabolites; Davilla elliptica; Remijia ferruginea; Luehea paniculata; Anacardium occidentale; Acosmium dasycarpum; Weed; Allelopathy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100227 |
| |
|
| |
|
|
| DIAS,R.C.; SANTOS,M.V.; FERREIRA,E.A.; BRAZ,T.G.S; FIGUEIREDO,L.V.; CRUZ,P.J.R.; SILVA,L.D.. |
| ABSTRACT: In pastures, the incidence of weeds reduces the productivity and quality of forage. The identification of the weed species in pastures is fundamental to choose the renewal method. Thus, the objective of this work was to perform phytosociology before and after the renewal of a Brachiaria decumbens pasture, with the implantation of agrosilvopastoral systems. Eighteen different crop arrangements for pasture renewal were evaluated. The renewal systems were by eucalyptus integration (at 12 x 2 m or 12 x 3 m spacings) with maize, Brachiaria brizantha cv. Marandu (palisade grass) and/or Macrotyloma axillare (perennial horsegram), or monoculture and intercropping of palisade grass and perennial horsegram, as well as the evaluation of the application or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Intercropping; Crop-livestock-forest; Weed; Pasture management. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100274 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Lima, Juliana Domingues; UNESP; Moraes, Wilson da Silva; APTA. |
| O objetivo do presente trabalho foi determinar o potencial alelopático de Ipomoea fistulosa na germinação e crescimento de plântulas. Em laboratório, sementes de alface e de tomate foram colocadas para germinar na presença de água ou extratos de folhas de Ipomoea fistulosa, nas concentrações de 5, 10 e 15% (p/v). Em casa-de-vegetação, as sementes foram colocadas para germinar em bandejas, contendo o substrato Plantmax® e o substrato Plantmax® + resíduo de folhas secas de Ipomoea fistulosa, na proporção 3% (p/p). O extrato aquoso inibiu a germinação e elevou o tempo médio de germinação das sementes, além de reduzir o crescimento da radícula e hipocótilo em todas as concentrações utilizadas. Em casa-de-vegetação, a altura da planta, o número de folhas, o... |
|
Palavras-chave: 5.01.00.00-9 Agronomia Ipomoae fistulosa; Planta daninha; Alelopatia 5.01.03.00-8 Fitotecnia Ipomoea fistulosa; Weed; Alellopathy. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3553 |
| |
|
|
| MACHADO,M.S.; FERREIRA,L.R.; PEREIRA,G.A.M.; GONÇALVES,V.A.; PAIXÃO,G.P.. |
| ABSTRACT: What is expected from an effective antidote, applied with an herbicide, is that it protects crops from damages by the herbicide without reducing its action on weeds. In this context, the goal of this study was to evaluate the effect of liquid fertilizer as a protector of eucalyptus plants and to control signal grass (Urochloa brizantha) submitted the application of glyphosate when applied in tank mixture. Plants were submitted to doses of liquid fertilizer and glyphosate; the application was performed so that the syrup would reach all aerial parts of the plants. The intoxication percentage of eucalyptus plants was evaluated on day 14, 35 and 49 after application (DAA). On day 49 DAA, the morphologic parameters of eucalyptus plants and the dry... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application technology; Antidotes; Eucalyptus urophylla; Urochloa brizantha; Weed. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100273 |
| |
|
|
| Velásquez Ballesteros,Oscar Julián; Murillo Perea,Elizabeth; Jairo Méndez,John; Murillo Arango,Walter; Noreña,Diana Alexandra. |
| Introduction: Sida cordifolia L. (Malvaceae) is a weed about which not much is known in Colombia. This plant is used in folk medicine to treat oral mucosa, blennorrhea, asthma and bronchitis.In Brazil it finds application as an anti-inflammatory,while in Colombia its "baba" is used for treating hair loss, constipation and internal fever, among other ailments. Objectives: to quantify the saponoside content and evaluate its antioxidant and antifungal functionality. Methods: we prepared organic, aqueous and hydroalcoholic extracts from the aerial section of the plant. The saponoside material was quantified by the DNS and p-anisaldehyde methods. The most concentrated extracts were selected for antioxidant and antifungal assays. Results: it was found that Sida... |
| Tipo: Journal article |
Palavras-chave: Sida cordifolia; Saponins; Weed; Antioxidant; P-anisaldhyde. |
| Ano: 2013 |
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962013000200013 |
| |
|
|
| Soltani,E; Soltani,A; Galeshi,S; Ghaderi-far,F; Zeinali,E. |
| Volunteer canola (Brassica napus) and Sinapis arvensis are well identified weeds of different cropping systems. Quantitative information on regarding seed production by them is limited. Such information is necessary to model dynamics of soil seed banks. The aim of this work was to quantify seed production as a function of the size of those weeds. A wide range of plant size was produced by using a fan seeding system performed at two sowing dates (environments). Plant size varied from 3 to 167 g per plant for canola and from 6 to 104 g per plant for S. arvensis. Seed production ranged from 543 to14,773 seeds per plant for canola, and from 264 to 10,336 seeds per plant for S. arvensis. There was a close relationship between seed production per plant and plant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weed; Plant size; Density; Planting. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000300003 |
| |
|
|
| CONCENCO, G.; MARQUES, R. F.; SANTOS, S. A. dos; PALHARINI, W. G.; ALVES, M. E. dos; MELO, T. S.. |
| A rasteirinha (Hybanthus parviflorus [Mutis ex L.f.] Baill) vem ganhando importância agrícola por causa de sua tolerância a herbicidas. Não existem recomendações e nem herbicidas registrados e indicados no Brasil para o controle dessa espécie. O objetivo deste estudo, Portanto, foi desenvolver alternativas de manejo para essa planta daninha. O trabalho foi composto por dois experimentos idênticos, que foram instalados em duas épocas, sendo o primeiro entre junho e setembro de 2013 e o segundo entre outubro de 2013 e janeiro de 2014. As unidades experimentais foram compostas por baldes de plástico com 4 litros de capacidade, preenchidos com solo peneirado e adubado, e dez mudas foram transplantadas para cada balde, sendo mantidas sete plantas por unidade... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Planta daninha; Controle; Weed; Herbicide; Control.; Herbicida.. |
| Ano: 2014 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/995528 |
| |
|
| |
|
| |
|
| |
| Registros recuperados: 141 | |
|
|
|
