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Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 153
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A cultura do girassol na região Meio-Norte do Brasil. Infoteca-e
RIBEIRO, J. L..
Preparo e correção do solo; Adubação; Época de semeadura; Espaçamento e densidade; Cultivares recomendadas; Controle de plantas daninhas; Controle de pragas; Controle de doenças; Colheita e armazenamento.
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Girassol; Cultivo; Adubação; Variedade; Praga; Doença; Helianthus annuus; Piaui; Maranhão; Fertilization; Pest; Disease; Sunflower; Varieties; Cultivation; Weed control.
Ano: 1998 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/63138
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A Dynamic Optimisation Model of Weed Control AgEcon
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
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Activities and Novel Applications of Secondary Metabolite Coumarins Planta Daninha
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
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Agronomic studies of corn and sorghum during 1977 Thai Agricultural
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
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Allelopathic Activity of Crop Residue Incorporation Alone or Mixed Against Rice and its Associated Grass Weed Jungle Rice (Echinochloa colona [L.] Link) Chilean J. Agric. Res.
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
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Allelopathic research in Brazil Acta Botanica
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
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Alternaria alternata f. sp. sphenocleae, a potential mycoherbicide of gooseweed (Sphenoclea zeylanica Gaertner) International Rice Research Institute
Masangkay, Rhomela Favila.
xxi, 195 l. : ill. Thesis (Ph.D.) -- McGill University
Tipo: Thesis Palavras-chave: Rice; Weed control; Weeds; Biological control; Mycoherbicides; Alternaria alternata; Sphenocleaceae.
Ano: 1996 URL: http://hdl.handle.net/123456789/610
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Amostragem do banco de semente e flora emergente de plantas daninhas. Repositório Alice
VOLL, E.; ADEGAS, F.S.; GAZZIERO, D.L.P.; BRIGHENTI, A.M.; OLIVEIRA, M.C.N. de.
O objetivo desta pesquisa foi determinar o número de amostras necessárias para estimar com precisão aceitável a quantidade de sementes no solo e a flora de plantas daninhas emergentes, em áreas experimentais e de lavoura, para auxiliar na tomada de decisão das estratégias de manejo das plantas daninhas. A amostragem do solo para quantificação do banco de sementes foi feita com trado tubular de 5,0 cm de diâmetro, na profundidade de 0 a 10 cm. A flora emergente foi contada por meio de um gabarito de ferro nas dimensões de 0,5x0,5 m, de forma aleatória na área. O número de amostras necessário foi estimado em razão da média de sementes da amostra, para uma determinada precisão (CV = 20% ou 40%). Foi estimado que, nas áreas experimentais, para médias de 10 a...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Banco de sementes do solo; Controle de planta daninha; Amostra de solo; Método; Soil seed banks; Weed control; Soil sampling; Method.
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/handle/doc/108899
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Application of herbicides in corn Thai Agricultural
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
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Applying search theory to determine the feasibility of eradicating an invasive population in natural environments AgEcon
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
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Avaliacao de roundup e diret no controle de plantas daninhas na cultura da erva-mate (Ilex paraguariensis A. St. Hill.). Repositório Alice
PELISSARI, A.; MEDRADO, M.J.S..
2000
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Erva-mate; Ilex paraguariensis; Herbicida; Planta daninha; Weed; Herbicides; Weed competition; Weed control; Yerba mate.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/handle/doc/301962
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Basic studies for weed control of cultural fields in cerrado. Infoteca-e
YAMAMOTO, H..
bitstream/item/178533/1/ID09932-CRI1786.pdf
Tipo: Capítulo em livro técnico (INFOTECA-E) Palavras-chave: Planta daninha; Cerrado; Controle Cultural; Weed control.
Ano: 1981 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/552990
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Biological control of Echinochloa species with pathogenic fungi International Rice Research Institute
Zhang, Wenming.
xxii, 167 p. ill. Thesis (Ph.D.) -- McGill University
Tipo: Thesis Palavras-chave: Echinochloa; Biological control; Rice; Weed control; Plant pathogenic fungi.
Ano: 1996 URL: http://hdl.handle.net/123456789/595
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Biotechnology and crop protection in Brazil. Repositório Alice
CAMPANHOLA, C.; RODRIGUES, G. S.; BETTIOL, W..
bitstream/item/180097/1/Companhola-Biotechnology-3564.pdf
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Productivity; Pesticide; Insect pest; Plant pathogen; Genetic control; Soybean; Tomato; Rubber tree; Coconut; Apple; Strawberry; Cana-de-açúcar; Agrotóxico; Alfafa; Agricultura; Arroz; Banana; Coco; Controle Biológico; Controle Genético; Erva Daninha; Fumo; Maçã; Morango; Praga de Planta; Produtividade; Seringueira; Soja; Alfalfa; Agriculture; Biological control; Rice; Sugarcane; Tobacco; Weed control.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/13013
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Comparacao de sistemas de controle de ervas daninhas nas culturas de milho e feijao, isoladas e consorciadas. Repositório Alice
SANTOS, D.M. dos; PEREIRA FILHO, I.A.; LEMOS, J.W.V.; ALBUQUERQUE, M. M. de..
Foram conduzidos experimentos no Campo Experimental de Santana do Ipanema, no Sertao Alagoano, durante 4 anos, com a finalidade de comparar os sistemas de controle de plantas daninhas nas culturas de milho e feijao, isoladas e consorciadas. O trabalho constou de 3 experimentos: feijao isolado, milho isolado e consorcio, com delineamento experimental de blocos ao acaso, num total de 12 tratamentos, por experimento, com 3 repeticoes, abrangendo metodos culturais manuais, mecanicos e quimicos.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Milho; Feijao; Consorciacao; Erva daninha; Controle; Maiz; Bean; Intercropping; Weed control; Milho; Feijao; Consorciação; Maiz; Bean; Intercropping.
Ano: 1984 URL: http://www.alice.cnptia.embrapa.br/handle/doc/133162
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Comparative Efficacy of Different Weed Management Strategies in Wheat Chilean J. Agric. Res.
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
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Comparison of response of legumes on previously atrazine treated soil with that of untreated and newly treated soils Thai Agricultural
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
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Conservation Agriculture in Trouble? Estimating the Economic Impact of an Eventual Glyphosate Prohibition in Spain Planta Daninha
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
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Control of ALS- and EPSPS-Resistant Amaranthus palmeri by Alternative Herbicides Applied in PRE- and POST-Emergence Planta Daninha
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
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Control of purple nutsedge in corn plantings Thai Agricultural
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
Registros recuperados: 153
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