Consulta: subjectFacets:"Weed control"
Registros recuperados: 72
Data/hora: 07/06/2024 03:24:02

Weed Control as a Rationale for Restoration: The Example of Tallgrass Prairie
Provedor de dados: 7
Autores: Blumenthal, Dana M; University of Minnesota; dblumenthal@npa.ars.usda.gov; Jordan, Nicholas R; University of Minnesota; perr0128@tc.umn.edu; Svenson, Elizabeth L; University of Minnesota; esvenso1@swarthmore.edu.
The potential weed control benefits of ecological restoration are rarely cited and largely unstudied. Nevertheless, the nature of many restoration target communities, i.e., diverse, late-successional communities, suggests that restoration may control weeds and that the invasibility of plant communities may decrease with both diversity and successional age. Given the high cost of weed control in nonagricultural land, weed control benefits could be a strong incentive for restoration efforts. We examined the cumulative effects of restoration on weed populations 7 yr after tallgrass prairie restoration on a Minnesota sand plain. The numbers and biomass of volunteer weeds were compared among randomized plots with (1) no restoration, (2) prairie seed addition,...
Tipo: Peer-Reviewed Reports
Palavras-chave: Community invasibility; Invasion; Prairie; Restoration; Succession; Weed competition; Weed control; Weeds.
Ano: 2003

The use of sunn hemp as green manure intercropped with taro
Provedor de dados: 75
Autores: Oliveira,Fábio Luíz de; Guerra,José Guilherme M; Ribeiro,Raul de LD; Almeida,Dejair Lopes de; Silva,Edmilson Evangelista da; Urquiaga,Segundo; Espindola,José Antônio A.
An experiment was carried out in Magé, Rio de Janeiro State, Brazil, to evaluate the performance of taro (Colocasia esculenta) intercropped with sunn hemp (Crotalaria juncea), used as green manure. A randomized blocks design with four replicates was used and the soil of the field plots was classified as Haplic Gleysol. Treatments consisted of taro (1) intercropped with unpruned sunn hemp, (2) intercropped with sunn hemp cut at soil level, (3) intercropped with sunn hemp pruned at its mid-height, and (4) in monoculture. The taro was planted in double rows spaced by 1.0 m. The planting furrows had a space of 0.5 m, with rhizomes placed at every 3.0 m. The experimental plot consisted of four 3.0 m rows and the useful area corresponded to the five central...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crotalaria juncea; Colocasia esculenta; Organic farming; Leaf area; Leaf burning; Weed control.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362007000400013

Controle de plantas daninhas na cultura da seringueira na microrregião Alto Purus- Acre. II. Em condições de seringal em formação.
Provedor de dados: 14
Autores: CASTRO, F. de A.; CAMPOS, I. S.
O controle eficiente e econômico de plantas daninhas é um dos principais fatores de alta produção em todas as culturas. Na cultura da seringueira, não será exagero afirmar que, em sua fase inicial é este o problema técnico mais difícil de resolver, muito especialmente na região Amazônica, onde as condições climáticas favorecem o desenvolvimento de uma flora infestante cuja composição é extraordinariamente variada, exigindo, por conseguinte, um maior número de capinas para manter o cultivo em boas condições de vegetação. Neste trabalho procurou-se estudar o efeito de diferentes doses de misturas de herbicidas, aplicados em pré e pós-emergência, objetivando maior eficiência no controle das plantas daninhas, na cultura da seringueira, nas condiç3es...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Ruber tree; Alto Purus; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Hevea spp; Control de malezas.; Seringueira; Erva daninha; Defensivo; Herbicida; Caucho.; Herbicides.; Weed control.
Ano: 1979
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/492289

Manejo integrado de plantas invasoras na agricultura orgânica.
Provedor de dados: 14
Autores: FONTES, J. R. A.; SHIRATSUCHI, L. S.
ABSTRACT: Mankind has explored the natural resources, with recorded examples of disasters through its history. Plants have been used as medicine for containing substances to prevent or cure diseases. In contradiction the advance in agriculture has threatened many species before they are known. Since our ancestors the continuous technological development has produced wonderful benefits from plants and animals even in hostile environments as in the semiarid Brazilian Caatinga. Exploitation of soil and water occurs at never seen rates, associated with industrialized inputs continuously growing. Organic agriculture has gained promience as an a alternative even trough its causes impact. Integrated weed management (IWM) can contribute to reduce negative...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Planta daninha; Management; Integrated control; Agronomic characters; Organic farming.; Agricultura Orgânica; Alelopatia; Características Agronômicas; Controle Integrado; Controle Biológico; Impacto Ambiental; Manejo.; Environmental impact; Weed control; Weeds.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567045

Manejo e tratos culturais da videira.
Provedor de dados: 14
Autores: LEAO, P. C. de S.
bitstream/item/177308/1/8765.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cultivo; Controle de planta daninha; Cultivation; Management; Thinning; Manejo; Poda; Raleio; Regulador de Crescimento; Uva; Vitis Vinifera; Grapes; Plant growth substances; Pruning; Weed control.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134100

Controle de plantas daninhas com herbicidas aplicados via herbigacao, na cultura do feijao, em plantios direto e convencional.
Provedor de dados: 14
Autores: FONTES, J. R. A.; SILVA, A. A. da; VIEIRA, R. F.; RAMOS, M. M.
bitstream/CPAC-2009/24717/1/doc_55.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Planta daninha; Zero tillage; Herbigation.; Controle Químico; Feijão; Herbicida; Phaseolus Vulgaris; Plantio Direto; Solo.; Herbicides; Beans; Chemical control; Conventional tillage; Fomesafen; Metolachlor; Soil; Weed control; Weeds.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546461

Basic studies for weed control of cultural fields in cerrado.
Provedor de dados: 14
Autores: YAMAMOTO, H.
bitstream/item/178533/1/ID09932-CRI1786.pdf
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Planta daninha; Brasil; Japão; BIBJICACPAC.; Cerrado; Controle Cultural; Cooperação Internacional.; Pesquisa; Weed control.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/552990

Sistema plantio direto: o produtor pergunta, a Embrapa responde.
Provedor de dados: 14
Autores: SALTON, J. C.; HERNANI, L. C.; FONTES, C. Z.
Introdução; Conceitos, Adoção, Palha; Manejo do material orgânico; Culturas, sucessões e rotações; Água e temperatura no solo; Biologia do solo; Compactação do solo; Terraços; Correção do solo; Adubação; Coleta de amostras de solo e de planta; Mecanização; Tecnologia de aplicação de defensivos agrícolas; Plantas daninhas e seu controle; Manejo de pragas; Manejo de doenças; Integração agricultura-pecuária; Custos de produção; Agricultura de precisão.
Tipo: Col Criar Plantar ABC 500P/500R Saber (INFOTECA-E)
Palavras-chave: Adubação; Agricultura de Precisão; Biologia do Solo; Cerrado; Compactação do Solo; Custo de Produção; Doença de Planta; Matéria Orgânica; Mecanização Agrícola; Plantio Direto; Rotação de Cultura; Sistema de Cultivo; Tecnologia; Disease control; Fertilizer application; No-tillage; Organic matter; Pesticides; Soil biology; Technology; Weed control.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1124531

Movimentacao de herbicidas no solo aplicados via herbigacao na cultura do feijao em plantios direto e convencional.
Provedor de dados: 14
Autores: FONTES, J. R. A.; SILVA, A. A. da; VIEIRA, R. F.; RAMOS, M. M.
bitstream/CPAC-2009/24716/1/doc_54.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Planta daninha; Zero tillage.; Controle Químico; Feijão; Herbicida; Lixiviação; Phaseolus Vulgaris; Plantio Direto; Solo.; Chemical control; Beans; Fomesafen; Herbicides; Conventional tillage; Leaching; Metolachlor; Soil; Weeds.; Weed control.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546459

Cultura do maracujazeiro no Estado do Acre.
Provedor de dados: 14
Autores: ANDRADE NETO, R. de C.; NOGUEIRA, S. R.; NEGREIROS, J. R. da S.; NASCIMENTO, G. C. do.
Práticas agrícolas, como escolha e manejo adequado do solo, utilização de cultivares adaptadas à região, adoção de espaçamentos corretos, além de calagem e adubação, irrigação, podas, polinizações manuais, controle fitossanitário de pragas, entre outras, podem levar o maracujazeiro a atingir altas produtividades. Desse modo, a Embrapa Acre coloca à disposição dos produtores, professores e extensionistas, de forma objetiva e concisa, uma importante publicação que aborda as práticas inerentes ao cultivo do maracujazeiro de forma sustentável e econômica.
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Producción de plántulas; Yellow passion fruit; Análisis económico; Uso de la tierra; Cultivares; Prácticas de cultivo vegetal; Huertos frutales; Encalado; Aplicación de fertilizantes; Irrigación; Polinización; Control de malezas; Plagas de plantas; Enfermedades y desórdenes de las plantas; Cosecha; Tratamiento postcosecha; Comercialización; Economía de mercado; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental.; Maracujá; Passiflora Edulis; Sistema de Produção; Uso da Terra; Variedade; Pratica Cultural; Muda; Produção; Pomar; Calagem; Adubação; Irrigação; Poda; Polinização; Erva Daninha; Praga de Planta; Doença de Planta; Colheita; Mercado.; Comercialização; Pós-Colheita; Análise Econômica; Pruning; Weed control; Plant pests; Plant diseases and disorders; Harvesting; Postharvest treatment; Commercialization; Market economy.; Fertilizer application; Irrigation; Pollination; Economic analysis; Land use; Cultivars; Plant cultural practices; Seedling production; Orchards; Liming.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1132364

Controle de plantas daninhas em tomateiro na regiao de Pacaraima, Roraima.
Provedor de dados: 14
Autores: LUZ, F. J. de F.; MEDEIROS, R. D. de.
Tipo: Folhetos
Palavras-chave: Controle; Roraima; Pacaraima; Tomato; Erva Daninha; Tomate; Weed control.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/688065

Cultivo da azolla em várzea do rio Guamá, estuário amazônico.
Provedor de dados: 14
Autores: MODESTO JUNIOR, M. de S.; MASCARENHAS, R. E. B.; FERREIRA, W. de A.
bitstream/item/34715/1/RecBas-43.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Controle de erva daninha; Rio guama; Pará; Brasil; Cultural methods.; Azolla; Arroz; Colheita; Mururé Rendado; Produtividade; Pratica Cultural; Planta Aquatica; Sistema de Cultivo; Várzea.; Aquatic plants; Amazonia; Harvesting; Cropping systems; Rice; Yields.; Weed control.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375922

Efeitos alelopáticos do ácido aconítico: considerações e resultados.
Provedor de dados: 14
Autores: VOLL, E.
Efeitos alelopáticos do ácido aconítico: considerações e resultados. Braquiárias e alelopatia. Efeitos sobre a germinação, crescimento e modo de ação do ácido t-aconítico. Efeitos de manejo das culturas. Efeitos alelopáticos em sementes de plantas daninhas. Efeitos alelopáticos na soja. O uso complementar da vinhaça. Considerações finais.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Planta daninha; Erva Daninha; Weed control.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1112275

Ecophysiological response of Sorghum halepense populations to reduced rates of nicosulfuron
Provedor de dados: 86
Autores: Acciaresi,Horacio Abel; Chidichimo,Hugo Oscar.
The control and regrowth after nicosulfuron reduced rate treatment of Johnsongrass (Sorghum halepense L. Pers.) populations, from seven Argentinean locations, were evaluated in pot experiments to assess if differential performance could limit the design and implementation of integrated weed management programs. Populations from humid regions registered a higher sensibility to reduced rates of nicosulfuron than populations from subhumid regions. This effect was visualised in the values of regression coefficient of the non-linear models (relating fresh weight to nicosulfuron rate), and in the time needed to obtain a 50% reduction of photosynthesis rate and stomatal conductance. The least leaf CO2 exchange of subhumid populations could result in a lower...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Johnsongrass; Weed control; Weed regrowth.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000600003

Suppressive effects on weeds and dry matter yields of cover crops
Provedor de dados: 86
Autores: Ferreira,Alexandre Cunha de Barcellos; Borin,Ana Luiza Dias Coelho; Bogiani,Julio Cesar; Lamas,Fernando Mendes.
Abstract: The objective of this work was to evaluate the dry matter yield of cover crops and their suppressive effects on weeds. The experiment was carried out during three years in a cerrado area of the state of Goiás, Brazil, and consisted of 16 treatments with fallow and cover crops cultivated in single cropping and intercropping. Fallow allowed high weed infestation. Cover crops affected the composition of weeds, which showed greater diversity in fallow, followed by the Pennisetum glaucum 'BRS 1501' and Cajanus cajan crops. In the average of the three experimental years, the highest dry matter yield was observed for the treatments Panicum maximum (10,857 kg ha-1), Urochloa brizantha 'Piatã' (11,437 kg ha-1), U. ruziziensis (9,463 kg ha-1), and U....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fallow; Species composition; Straw mulch; Weed control.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000500566

Quinoa (Chenopodium quinoa) reaction to herbicide residue in a Brazilian Savannah soil
Provedor de dados: 86
Autores: Santos,Roberto Lorena de Barros; Spehar,Carlos Roberto; Vivaldi,Lucio.
The quinoa (Chenopodium quinoa Willd.) cultivation, one of the most promising in double cropping with soybeans or maize, depends on weed control. The objective of this work was to evaluate quinoa reaction to herbicide residue in a savannah soil. Six herbicide treatments, trifluralin, pendimethalin, clomazone, imazaquin, trifluralin + imazaquin and control, were applied, prior to summer cultivation of soybean, in a Dark-Red Latosol (typic Haplustox). Soybean cultivar BR 9 Savana was grown and soil samples were collected at 15, 38, 100, 145 and 206 days after treatment and stored at -5ºC. Bioassays were conducted in greenhouse, using quinoa, cultivar Q18. Imazaquin was the most harmful to quinoa seedlings, up to 206 days after application, followed by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chenopod; Weed control; Toxicity; Yields.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000600014

Production of a bioherbicide agent in liquid and solid medium and in a biphasic cultivation system
Provedor de dados: 87
Autores: Moraes,C.; Monteiro,A.C.; Machado,A.C.R.; Barbosa,J.C.; Mochi,D.A.
The use of fungi in weeds control programs depends upon the conidia production in large scale. Therefore, this study aimed to evaluate liquid and solid culture media and the cultivation by biphasic system for the conidia production of Bipolaris euphorbiae Muchovej &amp;amp; Carvalho a specific pathogen of Euphorbia heterophylla. The liquid media were obtained from agro-industrial waste or by-products, and the solid media were prepared with mixtures of grains and grain derivatives. The liquid medium made with sugar cane molasses stood out from the others because it provided great sporulation (23 x 10(4) conidia mL-1 of medium), conidial viability (99.7%), and formation of mycelial fungal biomass (1.26 g 100 mL-1 of medium). On solid media conidial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bipolaris euphorbiae; Euphorbia heterophylla; Biological control; Weed control; Fungus production; Natural substrates.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000200002

Control of ALS- and EPSPS-Resistant Amaranthus palmeri by Alternative Herbicides Applied in PRE- and POST-Emergence
Provedor de dados: 87
Autores: GONÇALVES NETTO,A.; NICOLAI,M.; CARVALHO,S.J.P.; MALARDO,M.R.; LÓPEZ-OVEJERO,R.F.; CHRISTOFFOLETI,P.J.
ABSTRACT: The emergence of resistant biotypes of the Amaranthus palmeri species in cotton production areas of the state of Mato Grosso, Brazil, generated the need for correct identification of this species and information on viable herbicidal tools for their management. Thus, greenhouse experiments were conducted to evaluate the efficacy of alternative herbicides applied to A. palmeri in pre and post emergence. A randomized block design with four replications was used. The efficacy of herbicides applied in pre emergence was evaluate in two experiments, one in a clayey and other in a sandy soil; 9 herbicide treatments (8 with herbicide application and a control without application) were applied on each soil. Subsequently, two experiments with different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caruru; Weed control; Resistance; Phenology; Soil texture.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100193

Timing of weed management and yield penalty due to delayed weed management in soybean
Provedor de dados: 87
Autores: S. Daramola,Olumide.
Abstract  Background:  Weed interference is a major limiting factor for economically viable soybean production. Appropriate timing of weed management would enable farmers to make more efficient use of resources for weed management.  Objective:  The objective of this study was to determine the critical period for weed competition and appropriate timing of weed management for optimum yield of soybean.  Methods: The treatments consisted of periods of weed infestation and weed removal for the first 14, 28, 42 and 56 days after sowing (DAS), and till harvest in a randomized complete block design with three replications in 2016 and 2017.  Results:  Soybean yields in both years ranged from 914-945 kg ha-1 with no weed control to 1,984-2,127 kg ha-1 in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Critical period Glycine max (L.) Merrill; Manual weeding; Weed control; Weed infestation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100324

WATER USE EFFICIENCY, GROWTH AND YIELD OF WHEAT CULTIVATED UNDER COMPETITION WITH Setaria
Provedor de dados: 87
Autores: IHSAN,M.Z.; EL-NAKHLAWY,F.S.; ISMAIL,S.M.
ABSTRACT Understanding the critical period of weed competition is indispensable in the development of an effective weed management program in field crops. Current experiment was planned to evaluate the critical growth period ofSetaria and level of yield losses associated with delay in weeding in rain-fed drip irrigated wheat production system of Saudi Arabia. Field experiment was conducted to evaluate the effect of weeding interval (07-21, 14-28, 21-35, 28-42 and 35-49 days after sowing) and drought stress (75% and 50% of field capacity) on Setaria growth, wheat yield and water use efficiency. Season long weedy check and wellwatered (100% FC) plots were also maintained for comparison. Weeding interval and drought stress significantly (p ≤ 0.05) affected...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weed control; Competition interval; Setaria viridis; Field capacity; Arid land.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400679

Conservation Agriculture in Trouble? Estimating the Economic Impact of an Eventual Glyphosate Prohibition in Spain
Provedor de dados: 87
Autores: PARDO,G.; MARTÍNEZ,Y.
ABSTRACT: Weed control is a crucial aspect in many conservation agriculture systems given that costs and time savings from avoiding tillage are closely linked to the use of effective and environmental friendly herbicides. This has led to the widespread use of glyphosate in farms, as it is a broad-spectrum, easily degradable, low- cost herbicide. The recent debate on the safety of glyphosate and on the excessive use of chemical herbicides in food production has caused concern on farmers about the possible economic effects of a virtual ban on glyphosate. The aim of this paper is to estimate the costs associated with an eventual prohibition of glyphosate in Spanish conservation agriculture areas. The costs of different alternative weed control strategies for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation systems; Conventional tillage; Economic evaluation; Weed control.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100166

Integrated Approaches for Weed Suppression in Chickpea (Cicer arietinum) under Residual Moisture After Rice Crop
Provedor de dados: 87
Autores: KHAN,I.A.; KHAN,R.; HASSAN,G.; WAQAS,M.; SHAH,S.M.A.; KHAN,S.A.
ABSTRACT: Three-year field studies were undertaken at Agricultural Research Institute, Dera Ismail Khan, Khyber Pakhtunkhwa Province, Pakistan from 2010-11 to 2012-2013 with the aim of assessing the efficacy of different management techniques on weed growth and yield of chickpea under rain-fed conditions on residual moisture of a previous rice crop. Treatments of the experiment consisted of recommended full and half doses of three herbicides, i.e., Stomp 330E, Dual Gold 960EC and Isoproturon 500EW and the plant extract of Parthenium hysterophorus. Hand weeding treatment was kept as positive control whereas weedy check was included as negative control treatment. The experiment was laid out in a Completely Randomized Block (CRB) design replicated thrice....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicides; Stomp 330E; Parthenium extract; Residual moisture; Weed control; Seed yield.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100339

Management and development of fleabane plants in central Brazil
Provedor de dados: 87
Autores: Correia,Núbia Maria.
Abstract  Background:  Fleabane plants (Conyza spp.) resistant to glyphosate herbicide are found infesting areas in the Central-West and Southeast regions of Brazil, but its management is not a concerning problem for summer crops in these regions as in the South region of Brazil.  Objective:  To evaluate the management of adult fleabane plants at the summer soybean crop and off-season (autumn-winter), monitoring new emergences to assess the dynamics of plants from November 2018 to March 2020, and the residual effect of herbicides applied at the end of the rainy season in the Cerrado biome, in Brasília, DF, Brazil.  Methods:  Four field experiments were developed from November 06, 2018 to April 02, 2020; all under randomized block design, with four...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Conyza spp.; Residual herbicide; Weed control; Soybean.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100340

Activities and Novel Applications of Secondary Metabolite Coumarins
Provedor de dados: 87
Autores: HUSSAIN,M.I.; QAMAR ABBAS,S.; REIGOSA,M.J.
ABSTRACT: This review covers biological activity of secondary metabolites, coumarin and their derivatives on different organisms (pests, pathogens, weeds), as well as their applications in agriculture as eco-friendly pesticides and weed control agents. Naturally occurring coumarins have shown biological and allelopathic potential on a broad range of organisms. Coumarin inhibits seed germination, root growth, morphology, histology, water uptake, respiration, photosynthesis, cell elongation, cell división and differentiation. Coumarin demonstrate excellent insecticidal potential against eggs, larvae and adult insects. Coumarin showed antifeedent responses in a wide range of memebers from invertebrates to vertebrates. The information provided in this review...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coumarin; Secondary metabolites; Multifunctionality; Herbivory; Allelopathy; Phytotoxicity; Weed control.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100220

Weeds in a Sugar Cane Soil Cultivated with Crotalaria juncea
Provedor de dados: 87
Autores: OBRADOR-OLÁN,J.J.; GARCÍA-LÓPEZ,E.; ALMEYDA-SANTOS,L.E.; CASTELÁN-ESTRADA,M.; CARRILLO-ÁVILA,E.
ABSTRACT: Cover crops play an important role in sustainable agriculture, as they decrease soil erosion, promote the incorporation of nitrogen into the soil and reduce or modify weed communities. Aiming at evaluating the changes related to the cultivation and incorporation of sunn crotalaria (Crotalaria juncea L.1753) in a weed community of a soil cultivated with sugarcane, an agro-industrial crop of vital importance to La Chontalpa region, Tabasco, Mexico, an experiment encompassing the cultivation cycle and the incorporation of the dry phytomass of this cover crop was carried out. The treatments included three levels of fertilization and two controls, the plots of the first control were interspersed with those of the treatments, while the second control...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sunn crotalaria; Saccharum; Weed control; Cover crop.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100202

Effect of Isoproturon With and Without Adjuvants on Photosynthetic Attributes of Wheat and Its Associated Weeds
Provedor de dados: 87
Autores: JAVAID,M.M.; ZIA,A.U.H.; WAHEED,H.; NARGIS,J.; SHAHID,A.; AZIZ,A.; WASAYA,A.
ABSTRACT: Among various weed management strategies, chemical weed control is considered the most effective method. However, optimum dose and suitable combination of herbicide with adjuvants play a vital role in controlling weeds at an acceptable level and produce maximum crop yield. A field study was conducted to investigate the effect of post-emergence herbicide isoproturon alone or with combination of adjuvants on winter wheat and its associated weeds. The treatments were isoproturon at 175 g a.i. ha-1, 140 g a.i. ha-1 and 105 g a.i. ha-1 applied alone or with adjuvants Ad-500 or Bio-enhancer at 400 mL ha-1 each and weedy check as a control treatment. Isoproturon at 175 g a.i. ha-1 + Bio-enhancer at 400 mL ha-1 was most effective treatment for control of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fresh and dry weight; Gas exchange traits; Growth and yield; Herbicide doses; Triticum aestivum L.; Weed control.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100224

EFFECT OF POST-EMERGENCE HERBICIDE APPLICATIONS ON RICE CROP WEED COMMUNITIES IN TOLIMA, COLOMBIA
Provedor de dados: 87
Autores: RAMÍREZ,J. G.; PLAZA,G.
ABSTRACTThe weed communities of agricultural systems are dynamic and respond to changes in agronomic practices. This study aimed to evaluate the effect of post-emergence herbicide control programs made by farmers on weed communities and commercial lots of rice. The evaluations were carried out in 96 commercial lots located in the Centro, Meseta and Norte zones of the department of Tolima. In each lot, 1 ha was marked off, in which the evaluations were carried out by randomly throwing a 0.2 x 0.2 m sampling-square 5 times. Samples were taken before the first post-emergence application, after the first post-emergence application, after the second post-emergence application, and once the post-emergence applications were finished. The evaluated variables...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weed control; Pendimethalin; Propanil; Bispyribac sodium.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300499

INTERFERENCE PERIODS AMONG WEEDS AND SOYBEAN RR TM CROPS IN THE WESTERN CENTER AREA OF THE BRAZILIAN STATE OF PARANÁ
Provedor de dados: 87
Autores: SILVA,A.A.P.; OLIVEIRA NETO,A.M.; GUERRA,N.; HELVIG,E.O.; MACIEL,C.D.G.
ABSTRACT One of the factors that can influence soybeans yield is the interference imposed by weeds. This research has aimed to determine the critical period of weed interference on cv. INT 6100 RRTM soybeans. The experiment was conducted under field conditions at Campo Mourão County, Parana State, in the 2013/2014 harvest, using randomized blocks, arranged in a 2 x 8 factorial, with four replications. In the first factor, the coexistence (period before weed interference) and control (total period of weed interference prevention) periods were assessed. The second factor consisted of management times of weed species (0, 7, 14, 28, 35, 49, 56 and 130 days after emergence - DAE). The evaluations performed were density and shoot dry matter of the weed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coexistence; Weed control; Competition; Glycine max.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400707

National Conference on Irrigation for Food Security Voluume 1; Proceedings on Water, Food Security and Climate Change in Sri Lanka, EMICH, Colombo, June 9-11, 2009
Provedor de dados: 31
Tipo: Presentation
Palavras-chave: Food security; Climate change; River basins; Water shortage; Irrigated farming; Water quality; Tanks; Aquatic plants; Rice; Food insecurity; Water resource management; Zero tillage; Weed control; Agroforestry; Canals; Surface runoff; Remote sensing; Agricultural and Food Policy; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Livestock Production/Industries; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/118419

Weed Search and Control: Theory and Application
Provedor de dados: 31
Autores: Cacho,   Oscar J.; Spring,   Daniel; Pheloung,   Paul; Hester,   Susan M.
The detectability of invasive organisms influences the costs and benefits of alternative control strategies, and the feasibility of eradicating an infestation. Search theory offers a mathematically rigorous framework for defining and measuring detectability, taking account of searcher ability, biological factors and the search environment. To demonstrate the application of search theory to invasive species control, invasive species detectability is incorporated into a population simulation model. The model is applied to a base set of parameter values that represent reasonable values for a hypothetical weed. The analysis shows the effects of detectability and search time on the duration of an eradication program. Furthermore, for a given level of...
Tipo: Working or Discussion Paper
Palavras-chave: Search and control; Search theory; Weed control; Stage matrix; Impedance factors; Population dynamics; Stochastic model; Farm Management.
Ano: 2004
URL: http://purl.umn.edu/12919

Valuing the biodiversity gains from protecting native plant communities from bitou bush (Chrysanthemoides monilifera subsp rotundata (DC.) T.Norl.) in New South Wales: application of the defensive expenditure method
Provedor de dados: 31
Autores: Sinden,   Jack A.; Downey,   Paul O.; Hester,   Susan M.; Cacho,   Oscar J.
Valuation of the gains from protection of biodiversity is difficult because the services that provide the benefits do not normally pass through markets where prices can form. But the services sometimes pass through markets where consumers or producers behave in a market-oriented manner, and so the values implicit in this behaviour can be identified and derived. Estimates of the benefits of biodiversity protection are derived from the costs of protecting native plant communities from a major weed in Australia, by following this approach. In 1999, invasion of coastal areas of New South Wales by bitou bush (Chrysanthemoides monilifera subsp. rotundata (DC.) T. Norl.) was listed as a key process threatening native plants under the NSW Threatened Species...
Tipo: Conference Paper or Presentation
Palavras-chave: Bitou bush; Chrysanthemoides monilifera; Threat abatement plan; Valuation of biodiversity; Benefit-cost analysis; Weed control; Defensive-expenditure method; Demand and Price Analysis; Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/5988

Weed Invasions: To Control or Not to Control?
Provedor de dados: 31
Autores: Cacho,   Oscar J.; Wise,   Russell M.; Hester,   Susan M.; Sinden,   Jack A.
When a weed invasion is discovered a decision has to be made as to whether to attempt to eradicate it, contain it or do nothing. Ideally, these decisions should be based on a complete benefit-cost analysis, but this is often not possible. A partial analysis, combining knowledge of the rate of spread, seedbank longevity and economic-analysis techniques, can assist in making the best decision. This paper presents a model to decide when immediate eradication of a weed should be attempted, or whether weed control should be attempted at all. The technique is based on identifying two 'switching points': the invasion size at which it is no longer optimal to attempt eradication, and the invasion size at which it becomes optimal not to apply any form of control. It...
Tipo: Working or Discussion Paper
Palavras-chave: Invasive species; Eradication; Containment; Economics; Weed control; Switching point; Farm Management.
Ano: 2004
URL: http://purl.umn.edu/12908

Optimising woody-weed control
Provedor de dados: 31
Autores: Zull,   Andrew F.; Cacho,   Oscar J.; Lawes,   Roger A.
Woody weeds pose significant threats to the 12.3 billion dollar Australian grazing industry. These weeds reduce stocking rate, increase mustering effort, and impede cattle access to waterways. Two major concerns of woody-weed management are the high cost of weed management with respect to grazing gross margins, and episodic seedling recruitments due to climatic conditions. This case study uses a Stochastic Dynamic Programming (SDP) model to determine the optimal weed management decisions for chinee apple (Ziziphus mauritiana) in northern Australian rangelands to maximise grazing profits. Weed management techniques investigated include: no-control, burning, poisoning, and mechanical removal (blade ploughing). The model provides clear weed management...
Tipo: Conference Paper or Presentation
Palavras-chave: Woody weeds; Weed control; Chinee apple; Rangelands; Grazing; Stochastic dynamic programming; Livestock Production/Industries.
Ano: 2009
URL: http://purl.umn.edu/47620

A Dynamic Optimisation Model of Weed Control
Provedor de dados: 31
Autores: Cacho,   Oscar J.; Jones,   Randall E.
It is argued in this paper that static approaches to weed management, where the benefits and costs are only considered within a single season, are inappropriate for assessing the economic benefits of weed control technologies. There are carryover effects from weed management as weeds that escape control in one season may reproduce and replenish weed populations in following seasons. Consequently, it is appropriate to view weed control in the context of a resource management problem where the goal is to determine the optimal inter-temporal level of weed control that maximises economic benefits over some pre-determined period of time. A dynamic optimisation model for weed control is presented. Using the tools of comparative static analysis and Pontryagin's...
Tipo: Working or Discussion Paper
Palavras-chave: Weed control; Resource economics; Optimal control; Dynamic programming; Wild oats; Farm Management.
Ano: 2000
URL: http://purl.umn.edu/12902

Applying search theory to determine the feasibility of eradicating an invasive population in natural environments
Provedor de dados: 31
Autores: Cacho,   Oscar J.; Hester,   Susan M.; Spring,   Daniel.
The detectability of invasive organisms influences the feasibility of eradicating an infestation. Search theory offers a framework for defining and measuring detectability, taking account of searcher ability, biological factors and the search environment. In this paper, search theory concepts are incorporated into a population model, and the costs of search and control are calculated as functions of the amount of search effort (the decision variable). Simulations are performed on a set of weed scenarios in a natural environment, involving different combinations of plant longevity, seed longevity and plant fecundity. Results provide preliminary estimates of the cost and duration of eradication programs to assist in prioritising weeds for control. The...
Tipo: Article
Palavras-chave: Bioeconomics; Invasive species; Operations research; Population dynamics; Weed control; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/118522

Production and efficiency of water usage in capsicum crops under no-tillage and conventional planting systems
Provedor de dados: 124
Autores: Coelho,Maria Eliani Holanda; Freitas,Francisco Cláudio Lopes de; Cunha,Jorge Luiz Xavier Lins; Medeiros,José Francismar de; Silva,Márcio Gledson Oliveira da.
This study aimed to evaluate the effect of no-tillage and conventional planting systems, and of weed-management strategies on water-usage efficiency in capsicum crops. The experiment was carried out at the Universidade Federal Rural do Semi-Árido in Mossoró, Rio Grande do Norte, using a split-plot layout in a randomized block design with four replications. The tillage systems were evaluated in the plots, and three weed-management strategies evaluated in the subplots (soil cover with polyethylene film, and with and without weeds). The density and dry mass of the weeds, the commercial and total productivity, and the daily water consumption were all evaluated. It was found that the no-tillage system reduced the density and dry mass of the weeds in comparison...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chili; Plant and water; Mulch; Weed control.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000400010

Crop rotation and tillage system on the Italian ryegrass seed bank after long-term field management
Provedor de dados: 63
Autores: Guareschi,André; Cechin,Joanei; Bianchi,Mario Antonio; Maldaner,Ivan Carlos; Machado,Sergio Luiz de Oliveira.
ABSTRACT: Italian ryegrass (Lolium multiflorum Lam.) is a troublesome weed widely found in temperate Brazilian fields with several herbicide-resistant populations. Soil seed bank is the main source of future infestations and can be strongly affected by agricultural practices, such as crop rotation and tillage system. Therefore, this study evaluated the long-term effects of different crop rotation and tillage systems on the seed bank of Italian ryegrass. Data were collected in 2012 and 2013 in a field managed since 1985 under conventional-tillage and no-tillage and subjected to three cropping systems (monoculture, total, and partial rotation) compared to the control plot. The samples were collected at three soil depths (0-5, 5-10, and 10-20 cm) using a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lolium multiflorum Lam.; Dynamic population; Cultural methods; Mechanical practices; Weed control.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000500601

Monitoring the understory in eucalyptus plantations using airborne laser scanning
Provedor de dados: 63
Autores: Melo,Alessandra Morais; Reis,Cristiano Rodrigues; Martins,Bruno Ferraz; Penido,Tamires Mousslech Andrade; Rodriguez,Luiz Carlos Estraviz; Gorgens,Eric Bastos.
ABSTRACT In eucalyptus plantations, the presence of understory increases the risk of fires, acts as an obstacle to forest operations, and leads to yield losses due to competition. The objective of this study was to develop an approach to discriminate the presence or absence of understory in eucalyptus plantations based on airborne laser scanning surveys. The bimodal canopy height profile was modeled by two Weibull density functions: one to model the canopy, and other to model the understory. The parameters used as predictor in the logistic model successfully discriminated the presence or absence of understory. The logistic model composed by ℽ canopy, ℽ understory, and ℽ understory showed higher values of accuracy (0.96) and kappa (0.92), which means an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: LiDAR; Remote sensing; Weed control; Understory vegetation.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000101001

Progress report on control of purple nutsedge with glyphosate under field condition
Provedor de dados: 106
Autores: Suwunnamek, U.; Kongsangdow, A.; Chaochong, S.
2 ill., 2 tables
Palavras-chave: Corn; Maize; Purple nutsedge; Glyphosate; Weed control; Yields; ข้าวโพด; แห้วหมู; ไกลโฟเสท.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3935

On farm research and regional trials in Agricultural Colleges during 1982
Provedor de dados: 106
Autores: Rachain Thiraporn; Supot Faungfupong; Somchai Lim-aroon; Fishcher, K.S.; Pipat Weerathaworn; Aneknan Machauy; Pattama Sirithunya; Ladda Chuchaisangrat.
15 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Farmer's fields; Regional trials; Cultural practices; Planting methods; Weed control; Fertilizers; Fertilizer trials; Tillage systems; Spacing; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; วัชพืช; การทดสอบปุ๋ย; ระบบการไถพรวน; การจัดการ; ระยะปลูก.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4124

Progress report on nutsedge control with glyphosate
Provedor de dados: 106
Autores: Umporn Suwunnamek; Anchern Kongsangdow.
1 table
Palavras-chave: Corn; Maize; Nutsedge; Glyphosate; Weed control; ข้าวโพด; แห้วหมู; ไกลโฟเสท; วัชพืช.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3858

การควบคุมวัชพืชด้วยสารกำจัดวัชพืชในไร่ข้าวโพดเกษตรกร ปี 2552
Provedor de dados: 106
Autores: Sodsai Changsaluk; Rungsit Suwanmonkha; Somchai Pothisan; Somchai Lim-aroom.
Experiment on pre-emergence and post-emergence herbicide application for weed control in farmer's field conducted in Ban Yangrak, Khokcharoen district, Lopburi province, during August-November 2008. The experiment laid out in RCB, composed of 10 treatments, with 3 replications. The objective of this experiment was to study on the efficiency of herbicides and their effect on field corn, KSX 4901 variety. The results revealed that weed found in the experiment were purple nutsedge (Cyperus rotundus), wild poinsettia (Euphorbia heterophylla), horse purslane (Portulaca oleracea), tropical spiderwort (Commelina benghalensis), running grass (Brachiaria reptans), and jungle rice (Echinichloa colona). The application of 2,4-D, glufosinate, fluroxypyr and paraquat...
Palavras-chave: Field corn; Farmer's field; Herbicides; Weed control; Pre-emergence; Post-emergence; ข้าวโพดเลี้ยงสัตว์; วัชพืช; สารกำจัดวัชพืช; ไร่ข้าวโพดเกษตรกร; การควบคุมวัชพืช; ประสิทธิภาพ; การเจริญเติบโต; ผลผลิต; คุณภาพ.
Ano: 2010
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4691

Research on cultural practices in corn and corn based cropping system
Provedor de dados: 106
Autores: Narongsak Senanarong; Jansamoot Sarakul; Nipon Iamsupasit; Thongchai Tangpremsri; Somsri Thaiwesna; Chanika Patamadilok; Wantana Panichkul; Renu Chaisorn; Dusit Jaichareon; Pratuan Sawangsri; Vichitr Benjasil.
4 tables
Palavras-chave: Corn; Maize; Legumes; Cover crops; Mungbeans; Cultural practices; Weed control; Cropping systems; Intercropping; Spacing; Planting patterns; Yields; ข้าวโพด; ข้าวฟ่าง; การเพาะปลูก; ระบบการปลูกพืช; พืชตระกูลถั่ว; พืชคลุมดิน; วัชพืช; ระบบการปลูกพืชสลับ; ระยะระหว่างแถว; แบบแผนการปลูก.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3969

Physiological studies in corn and sorghum
Provedor de dados: 106
Autores: Pismai Srisukphrasert; Atcharee Rakla; Prakob Jan-aram; Teerasak Manupeerapan; Prasop Depyasuvarn.
5 ill., 8 tables
Palavras-chave: Corn; Maize; Sorghum; Harvesting date; Seed yield; Spacing; Weeding methods; Weed control; Detasseling; Ear; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; สรีรวิทยา; การเก็บเกี่ยว; ระยะระหว่างแถว; การกำจัดวัชพืช; ข้าวโพดฝักอ่อน.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4139

On-farm research and regional trials at Agricultural College during 1981
Provedor de dados: 106
Autores: Rachain Thiraporn; Supot Faungfupong; Somchai Lim-Aroon; Pipat Weerathaworn; Lilly Wongweerachotkit; Pattama Sirithunya.
22 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Cultural practices; Weed control; Fertilizers; Yields; Quality; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; วัชพืช; สารกำจัดวัชพืช; การทดสอบผลผลิต; การเพาะปลูก.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4048

ผลของสารสกัดหยาบจากข่าต่อการงอกและการเจริญเติบโต ของพืชปลูกและวัชพืชบางชนิด
Provedor de dados: 106
Autores: Supatra Khamriang; Wantana Sinsiri; Naris Sinsiri; Waranyu Kaewduangta.
In this study, crude extract of Alpinia galangal (Linn.) Swartz was separated into 2 fractions by column chromatography. The seeds of 6 species of crops and weeds (Oryza sativa, Zea mays L., Arachis hypogaea, Brassica iboglabra, Praxellis clematidea and Echinachola colonum) were placed in media containing either fraction A or B at various concentrations of 1%, 3% and 5%. The percentages of germination and growth of each species were measured. Fraction A at 5% resulted in the highest inhibition of germination for Oryza sativa, Zea mays L., Arachis hypogaea and Brassica iboglabra. In contrast, the germination of Praxellis clematidea and Echinachola colonum was most inhibited on media containing fraction B at 5%. The growth of the leaf width and stem length...
Tipo: Collection
Palavras-chave: Alpinia galangal (Linn.) Swartz; Crude extract; Growth; Plant pest; Weed; Brassica iboglabra; Praxellis clematidea; Oryza sativa; Zea mays L; Arachis hypogaea; Praxellis clematidea; Echinachola colonum; Weed control; ข่า; สารสกัดหยาบ; การเจริญเติบโต; วัชพืช; การกำจัดวัชพืช; การควบคุม; หญ้าสาบนก; หญ้าสาบม่วง; ข้าว; ข้าวโพด; ถั่วลิสง; คะน้า; การยับยั้งการงอก.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5838

Progress report on witchweed (Striga asiatica (L.) Kuntze): A root parasitic weed of corn in Thailand
Provedor de dados: 106
Autores: Maneesa Teerawatsakul; Somchart Kanjanajirawong.
Palavras-chave: Corn; Maize; Witchweed; Root parasite; Striga asiatica; Weed control; ข้าวโพด; หญ้าแม่มด; ปรสิตที่เกาะอยู่ที่ราก.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3936

Some Economic considerations regarding the use of atrazine herbicide on maize in Thailand
Provedor de dados: 106
Autores: Montgomery, Roger; Sanit Kao-ian; Chamnien Boonma.
8 tables
Palavras-chave: Corn; Maize; Weeds; Atrazine; Herbicides; Weed control; Economic analysis; Yields; ข้าวโพด; วัชพืช; อาทราซีน; สารกำจัดวัชพืช; การวิเคราะห์ทางด้านเศรษฐกิจ; การผลิต.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4079

Crop production and soil management practices for improving yield of corn
Provedor de dados: 106
Autores: Owaht Jootanon; Supot Faungfupong; Rachain Thiraporn.
18 tables
Palavras-chave: Corn; Maize; Varieties; Plant population; Thinning; Weed control; Tassel removal; Leaf angle; Plant densities; Crop production; Soil management practices; ข้าวโพด; การผลิต; การจัดการดิน.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3759

Progress report on witchweed (Striga asiatica (L.) O. Kuntze) a root parasitic weed of corn in Thailand
Provedor de dados: 106
Autores: Maneesa Teerawatsakul; Somchart Kanjanajirawong.
1 table
Palavras-chave: Corn; Maize; Witchweed; Striga asiatica; Root parasite; Herbicides; Weed control; Yields; ข้าวโพด; หญ้าแม่มด; ปรสิตที่เกาะรากพืช.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3859

Effects of herbicides on field corn (Suwan 1)
Provedor de dados: 106
Autores: Umporn Suwunnamek.
1 table
Palavras-chave: Corn; Maize; Herbicides; Suwan 1; Weed control; Yields; ข้าวโพด; สารกำจัดวัชพืช; พันธุ์สุวรรณ 1.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3830

Comparison of response of legumes on previously atrazine treated soil with that of untreated and newly treated soils
Provedor de dados: 106
Autores: Dad, Chaudhry Allah.
Palavras-chave: Legumes; Soybeans; Mungbeans; Atrazine; Herbicides; Soil treatment; Weed control; ข้าวโพด; อาทราซีน; พืชตระกูลถั่ว; การจัดการดิน.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3781

Effect of row spacing upon yield of two corn varieties under weeded and unweeded condition
Provedor de dados: 106
Autores: Ismail, Inu G.
1 table
Palavras-chave: Corn; Maize; Row spacing; Varieties; Weed control; Yields; ข้าวโพด; ระยะปลูก; การควบคุมวัชพืช.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3777

Control of purple nutsedge in corn plantings
Provedor de dados: 106
Autores: Suwunnamek, U.
1 ill., 1 table
Palavras-chave: Corn; Maize; Purple nutsedge; Herbicides; Weed control; Yields; ข้าวโพด; แห้วหมู; สารกำจัดวัชพืช.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3974

Effect of atrazine on controlling Euphorbia geniculata in corn
Provedor de dados: 106
Autores: Somchart Kanjanajirawong; Jaran Pratoomwong; Maneesa Teerawatsakul.
2 tables
Palavras-chave: Corn; Maize; Weeds; Milkweed; Euphorbia geniculata; Atrazine; Weed control; ข้าวโพด; วัชพืช; อาทราซีน; ยูโฟร์เบีย.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4061

Developing an on-farm testing program for Thailand
Provedor de dados: 106
Autores: Izuno, Takumi.
Palavras-chave: Corn; Maize; Sorghum; On farm testing; Variety trials; Weed control; Fertilizers; Plant density; Land preparation trial; Extension service; Adaptive research; Verification trials; Thailand; ข้าวโพด; ข้าวฟ่าง; การทดสอบในไร่นาเกษตรกร; การวิจัยเพื่อการปรับใช้; การทดสอบพันธุ์แบบหลายปัจจัย; การตลาด; ผลผลิต; คุณภาพ.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3849

Agronomic studies of corn and sorghum during 1977
Provedor de dados: 106
Autores: Supot Faungfupong; Wasana Wongyai; Kittima Montranon; Surapol Chowchong.
12 tables
Palavras-chave: Corn; Maize; Sorghum; Growth; Nitrate reductase; Agronomic characters; Dry weight; Nitrogen fertilizers; Weed control; Yields; ข้าวโพด; ข้าวฟ่าง; การเจริญเติบโต; การแข่งขันกับวัชพืช.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3921

Discovery of witchweed (Striga lutea Lour.), a root parasite of corn in Thailand II. Studies on witchweed control
Provedor de dados: 106
Autores: Maneesa Teerawatsakul; Somchart Kanjanajirawong; Eusupe Chaimanid; Chanpen Prakongvongs; Permsak Supaponhemin.
8 ill.
Palavras-chave: Corn; Maize; Witchweed; Striga lutea; Root parasite; Weed control; ข้าวโพด; วัชพืช; หญ้าแม่มด; สไตรก้า; ปรสิตที่เกาะรากพืช.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3831

International training
Provedor de dados: 106
Autores: Smeltzer, Dale G.
8 tables
Palavras-chave: Corn; Maize; Training programs; Varietal trials; Varieties; Fertilizer trials; Population density trials; Soil management trials; Crop management; Weed control; Plant breeding; Downy mildew; Growth; Yields; ข้าวโพด; โครงการฝึกอบรม.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3813

Effects of certain herbicides on field corn
Provedor de dados: 106
Autores: Umporn Suwunnamek; Surapol Chowchong.
1 table
Palavras-chave: Corn; Maize; Herbicides; Atrazine; Alachlor; Cyanazine; Weed control; ข้าวโพด; สารกำจัดวัชพืช; อาทราซีน; อะลาคลอร์; ไซยานาซีน.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3856

Application of herbicides in corn
Provedor de dados: 106
Autores: Somchart Kanjanajirawong; Maneesa Teerawatsakul.
1 table
Palavras-chave: Corn; Maize; Herbicides; Weed control; Atrazine; Alachlor; ข้าวโพด; การควบคุมวัชพืช; อาทราซีน; อะลาคลอร์.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3857

Outreach program National Corn and Sorghum Research Center Kasetsart University
Provedor de dados: 106
Autores: Rachain Thiraporn; Supot Faungfupong; Somchai Lim-aroon; Prapon Boonrumpun; Fishcher, K.S.; Pattama Sirithunya; Pipat Weerathaworn; Aneknan Machauy; Ladda Chuchaisangrat; Busaba Vitayaphatarasrikul.
11 tables
Palavras-chave: Corn; Maize; Sorghum; Varietal trials; Hybrid trials; Weed control; Spacing; Fertilizer trials; Tillage experiment; Verification trials; Cultural practices; Yields; National Corn and Sorghum Research Center; Kasetsart University; Outreach program; ข้าวโพด; ข้าวฟ่าง; การทดสอบระดับไร่กสิกร; การทดสอบพันธุ์; พันธุ์ลูกผสม; การควบคุมวัชพืช; ระยะปลูก; การทดสอบปุ๋ย; การไถพรวน; การทดสอบผลผลิต.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4151

ผลของการใช้สารกำจัดวัชพืชต่อการควบคุมวัชพืชและผลผลิตข้าวขาวดอกมะลิ 105 ในสภาพนาหว่านข้าวแห้ง
Provedor de dados: 106
Autores: Yeng Lee; Santimaitree Gonkhamdee; Bhalang Suriharn.
Weeds play an important role in decreasing yield in dry-direct seeded rice. However, using herbicide could effectively control weed and help increase rice yield. The objective of this research was to investigate the effect of herbicide application on weed control and rice yield in dry-direct seeded paddy field. The experiment was conducted at a farmer’s field, Khon Kaen province, from June to November of 2012 with the use of rice variety KDML 105. The nine treatments were 1) no weeding, 2) hand weeding, 3) oxadiazon, 4) oxadiargyl, 5) oxyfluorfen, 6) pendimethalin, 7) butachor/propanil, 8) clomazone and 9) bispyribac-sodium. The rates of herbicide application of treatments 3-9 were 120.0, 40.0, 28.2, 198.0, 175.0, 38.4 and 4.0 g ai/rai, respectively, The...
Tipo: PhysicalObject
Palavras-chave: Rice; KDML 105 variety; Rainy season rice; Weed control; Herbicide; Phytotoxicity; Weed density; Yield components; ข้าว; พันธุ์ขาวดอกมะลิ 105; ข้าวนาปี; นาหว่านข้าวแห้ง; การกำจัดวัชพืช; สารกำจัดวัชพืช; ความเป็นพิษ; ความหนาแน่นของวัชพืช; องค์ประกอบผลผลิต; ผลผลิตข้าว.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5798

On-farm research for corn and sorghum during 1976
Provedor de dados: 106
Autores: Supot Faungfupong; Mongkol Yolprasarn; Bunpote Tasanasuwan.
13 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Land preparation; Planting methods; Fertilizers; Depth of planting; Herbicides; Weed control; Plant density; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบปุ๋ย; สารกำจัดวัชพืช; ความลึกของการปลูก.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3850

Input verification trial : II Red soil
Provedor de dados: 106
Autores: Prakob Jan-aram.
1 table
Palavras-chave: Corn; Maize; On farm research; Verification trial; Red soil; Varieties; Fertilizers; Weed control; Yields; ข้าวโพด; การทดสอบผลผลิต; พันธุ์; ปุ๋ย; การกำจัดวัชพืช; ดินแดง; ผลผลิต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4336

On-farm research on corn during 1977
Provedor de dados: 106
Autores: Supot Faungfupong; Mongkol Yolprasarn.
26 tables
Palavras-chave: Corn; Maize; On farm research; Variety trials; Regional trials; Herbicides; Plant population; Fertilizers; Weed control; Seed quality; Plant densities; Yields; ข้าวโพด; การทดสอบพันธุ์; ความหนาแน่นของประชากร; การใส่ปุ๋ย; การควบคุมวัชพืช.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3939

Effect of plant density on growth and yield in Barraganete plantain ( Musa paradisiaca (L.) AAB cv. Curare enano) for a single harvest cutting in Provincia de Los Ríos, Ecuador
Provedor de dados: 109
Autores: Ulloa Cortazar,Santiago Miguel; Wolf,Erick Daniel; Armendáriz González,Ignacio.
Abstract The optimum plant density in Barraganete plantain (Musa paradisiaca (L.) AAB cv. Curare enano) was determined in Los Angeles-Provincia de Los Ríos, Ecuador. Treatments (sowing distance: T1 = 3m x 4m, T2 = 3m x 3m, T3 = 3m x 2m, T4 = 3m x 1.5m and T5 = 3m x 1m), were evaluated in a randomized complete block design with five treatments and three replicates per treatment. The number of hands per cluster, hand weight, weeks to flowering, weeks to harvest, production for export and weed incidence in plantain crop, were evaluated. Variance analysis was performed and means were submitted to the Tukey test at 5% probability (p = 0.05). The optimum sowing distance was 2m between plants and 3m between rows. The best density was 1666 plants. ha-1 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hands per cluster; Production for export; Weed control; Weeks to flowering; Weeks to harvest; Weight of hands.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000300367

Allelopathic research in Brazil
Provedor de dados: 39
Autores: Reigosa,Manuel; Gomes,Anabele Stefânia; Ferreira,Alfredo Gui; Borghetti,Fabian.
In this article, we review allelopathy studies conducted in Brazil or involving plant species that occur in the country. Conceptions and misconceptions associated with allelopathy, as well as some international criteria to be applied in allelopathic research, are presented and discussed. We observed a sharp increase in the number of papers on this subject conducted in Brazil between 1991 and 2010. However, most studies are conducted under laboratory conditions, lack a clear hypothesis or a solid justification, and typically make use of target species that do not co-exist with the donor species under natural conditions. We also found that most studies do not take the additional steps in order to purify and identify the bioactive molecules. We recommend that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Allelochemicals; Competition; Interference; Phytotoxicity; Weed control.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400001

Use of Beta vulgaris allelopathic properties to control some weeds associated with Lupinus albus plant comparing with two recommended herbicides.
Provedor de dados: 111
Autores: El Wakeel, Mona Adel; Dawood, Mona Gergis; El-Rokiek, Kowthar Gad; El-Awadi, Mohamed El-Sayed; Saad El-Din, Samia Amin.
Two pot experiments were carried out during two successive winter seasons of (2016 / 2017) and (2017 / 2018) at the green house of National Research Centre (NRC), Giza, Egypt.  The experiments were conducted to compare the allelopathic effect of Beta vulgaris (shoot and root aqueous extracts at 3, 6, 9%) to chemical herbicides (clodinafop-Propargyl and Basagran at recommended dose (140 g/fed and 1.5 l/fed, respectively) in controlling weeds (Phalaris minor and Malva parviflora) associated with Lupinus albus plants. Results showed that all applied aqueous extracts caused reduction in two weeds biomass under investigation. Meanwhile, root aqueous extract was more effective than shoot aqueous extract in controlling weeds. It is worthy to mention that phenolic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Weed control; Herbicides; Lupinus albus L.; Phalaris minor; Malva parviflora and  Beta vulgaris L.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5486

Comparative Efficacy of Different Weed Management Strategies in Wheat
Provedor de dados: 117
Autores: Ehsan Safdar,Muhammad; Asif,Muhammad; Ali,Amjed; Aziz,Ahsan; Yasin,Muhammad; Aziz,Mudassir; Afzal,Muhammad; Ali,Asghar.
Weed management programs should focus on environmental safety along with benefits to the farmer. We evaluated the effects of various weed control methods: ‘daab’ practice (stale seed bed technique), manual hoeing, and the chemical method (mixture of Buctril Super 60EC [bromoxynil + MCPA]0.45 kg ai ha-1 and Puma Super 75EW [fenoxaprop-P-ethyl] 0.75 kg ai ha-1) in combination with different planting geometries: 22.5 cm apart single row, 22.5 cm apart crisscross double row, 30 cm apart single row and broadcast sowings on weed control and grain yield of spring wheat (Triticum aestivum L.) var. Sehar 2006 at the University College of Agriculture, University of Sargodha, Pakistan, during the winters of 2009 and 2010. The chemical method, manual hoeing and ‘daab’...
Tipo: Journal article
Palavras-chave: Weed control; Sowing pattern; ‘daab’ practice; Crisscross sowing; Yield components.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200003

Allelopathic Activity of Crop Residue Incorporation Alone or Mixed Against Rice and its Associated Grass Weed Jungle Rice (Echinochloa colona [L.] Link)
Provedor de dados: 117
Autores: Khaliq,Abdul; Matloob,Amar; Ata Cheema,Zahid; Farooq,Muhammad.
Weed suppression is one of the several benefits achieved by soil incorporation of crop residues and such suppression is believed to be allelopathic in nature. The allelopathic potential of different crop residues: viz. sorghum (Sorghum bicolor [L.] Moench), sunflower (Helianthus annuus L.), brassica (Brassica campestris L.) was evaluated in rice (Oryza sativa L.) and jungle rice (Echinochloa colona [L.] Link). Chopped crop residues were soil-incorporated alone and mixed at 6 g kg-1 soil (12 t ha-1) and compared with a control without residues. Soil incorporation of residues substantially delayed germination of jungle rice. The time to start germination, time to 50% emergence, mean emergence time, emergence index, and final germination percentage were all...
Tipo: Journal article
Palavras-chave: Residues; Allelopathy; Sorghum; Sunflower; Brassica; Weed control.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300012

Controlled release formulations of herbicides based on micro-encapsulation
Provedor de dados: 118
Autores: Sopeña,Fátima; Maqueda,Celia; Morillo,Esmeralda.
Annual worldwide losses to weeds are estimated to comprise approximately 10-15% of attainable production among principal food sources. Worldwide consumption of herbicides represents 47.5% of the 2 million tons of pesticide consumed each year. However, the heavy use of herbicides has given rise to serious environmental and public health problems. It is therefore important to develop new herbicide formulations that are highly effective, that are safer (for the worker and for the environment), and that involve a low cost/production ratio. In this sense, Controlled release formulations of herbicides have become necessary in recent years, since they often increase herbicide efficacy at reduced doses. The present work reviews in detall the components of various...
Tipo: Journal article
Palavras-chave: Adjuvant; Contamination; Control; Delivery system; Formulations; Herbicide; Micro-encapsulation; Weed control.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100002