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| Registros recuperados: 115 | |
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| TOMAZETTI, M. B.; CAMARGO, E. R.; GOMES, J. P. S.; PARFITT, J. M. B.; SILVA, J. T. da; MOISINHO, I. S.; BRICKHILL, H.; CONCENÇO, G.. |
| This study aimed to analyze the impact of ryegrass as a soil cover on soil moisture level, initial rice establishment, grain yield and weed control in irrigated rice planted after ryegrass. The experiment was conducted under field conditions in randomized blocks design with four replications. Ryegrass (cv. BRS-Ponteio) was planted in autumn and glyphosate was used as a knockdown before rice planting. Ryegrass plants were cut at 0, 0.15, 0.30 or 0.45 m above ground, resulting in different mulching levels. Rice (cv. Irga-424-CL) was planted in spring and was managed according to local crop recommendations. Although positive to the overall cropping system, ryegrass mulching suppressed rice emergence, especially with ryegrass cutting heights above 0.30 m, thus... |
| Tipo: Artigo de periódico |
Palavras-chave: Arroz; Plantio Direto; Azevém; Palha; Rice; No-tillage; Weed control. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1138885 |
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| NOBREGA, L. B. da; BELTRAO, N. E. de M.; AZEVEDO, D. M. P. de; VIEIRA, D. J.. |
| Um ensaio de campo foi conduzido no Campo Experimental de Surubim, PE, em solo Franco-Arenoso, Das misturas herbicídicas, algumas foram aplicadas em pré-plantio incorporado e outras em pré-emergência em relação à cultura e às plantas daninhas. O complexo floristico da área experimental era constituído de plantas de folhas estreitas e folhas largas, apresentando taxas de populações aproximadamente equilibradas. O estudo foi realizado com misturas dos herbicidas trifluralin, alachlor, pendimethalin, cianazina, metolachlor, orizalin e diuron. Os resultados mostraram que a cultivar de algodoeiro (Gossypium hirsunim L.) SU 0450-8909 foi resistente às doses dos herbicidas utilizados e as misturas herbicídicas mostraram-se efetivas no controle de plantas daninhas... |
| Tipo: Artigo de periódico |
Palavras-chave: Herbicidas; Monocotiledoneas; Dicotiledoneas; Annual cotton; Herbicide; Chemical; Brasil; Pernambuco; Surub; Algodão Herbáceo; Controle Químico; Erva Daninha; Gossypium Hirsutum; Weed control. |
| Ano: 1987 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/262751 |
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| AZEVÊDO, D. N. P. de; BELTRÃO, N. E. de M.; NÓBREGA, L. B. da. |
| Um ensaio de campo foi conduzido no município de Surubim, PE, localizado na zona fisiográfica do Agreste pernambucano, no ano de 1979, com o objetivo de estudar a seletividade e a eficiência de misturas de herbicidas no controle de plantas daninhas em algodoeiro herbáceo. Os resultados indicaram que as misturas testadas (trifluralin ppi + diuron pré; trifluralin ppi + fluometuron pré-pendimethalin + diuron pré; pendimethalin + fluometuron pré; alachlor + diuron pré e alachlor + fluometuron em pré-emergência) mostraram-se, indistintamente, seletivas às plantas do algodoeiro, apresentaram um eficiente controle de ervas daninhas anuais por um período de 60 dias após a germinação do algodão e não interferiram no rendimento nem na qualidade da fibra do algodão... |
| Tipo: Artigo de periódico |
Palavras-chave: Controle; Brasil; Pernambuco; Annual cotton; Herbicide; Algodão Herbáceo; Erva Daninha; Fitotoxicidade; Gossypium Hirsutum; Herbicida; Surubim; Phytotoxicity; Weed control. |
| Ano: 1987 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/262760 |
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| IKEDA, F. S.; AZEVEDO, R. C.; POLTRONIERI, F.; OLIBONE, A. P. E.; CAVALIERI, S. D.; COSTA, W. B. da. |
| Improved methods of weed control are required to support expansion of large-scale cowpea cultivation in mid-west Brazil. With the aim of testing our hypothesis that the tolerance of cowpea cultivars to sulfentrazone is dose- and genotype-dependent, we assessed the effects of increasing doses (0, 250, 500 and 1,000 g ha-1 of sulfentrazone) on the cultivars BRS Imponente, BRS Novaera, BRS Tumucumaque and BRS Itaim. The phytotoxic effects of sulfentrazone varied according to the dose of herbicide applied, although the symptoms were mild and only observable at the initial stages of development and at the highest dose tested. No statistically significant interactions were detected between cultivars and doses, and there were no significant differences between... |
| Tipo: Artigo de periódico |
Palavras-chave: Planta daninha; Cultivar; BRS Imponente; BRS Novaera; BRS Tumucumaque; BRS Itaim; Sorriso-MT; Erva Daninha; Weeds; Weed control; Phytotoxicity; Cowpeas; Sulfentrazone. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1140468 |
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| GOMES, A. L. B.; FERNANDES, A. M. R.; HORTA, B. C.; OLIVEIRA, M. F. de. |
| In recent times, there has been an environmental pressure to reduce the amount of pesticides applied to crops and, consequently, the crop production costs. Therefore, investments have been made in technologies that could potentially reduce the usage of herbicides on weeds. Among such technologies, Machine Learning approaches are rising in number of applications and potential impact. Therefore, this article aims to identify the main machine learning algorithms used in integrated crop-livestock systems for weed management. Based on a systematic literature review, it was possible to determine where the selected studies were performed and which crop types were mostly used. The main research terms in this study were: "machine learning algorithms" + "weed... |
| Tipo: Artigo de periódico |
Palavras-chave: Weed prevention; Image processing; Inteligência artificial; Processamento de imagem; Erva Daninha; Weed control; Artificial intelligence. |
| Ano: 2024 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1163826 |
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| ALMEIDA, U. O. de; ANDRADE NETO, R. de C.; MARINHO, J. T. de S.; GOMES, R. R.; OLIVEIRA, J. R. de; SANTOS, R. S. dos; TEIXEIRA JUNIOR, D. L.; ARAÚJO, J. C. de. |
| As plantas daninhas são consideradas como um dos principais problemas nas culturas, pois interfere no rendimento, qualidade do produto e na rentabilidade da atividade agrícola. O adequado manejo destas plantas depende, primeiramente, da identificação das espécies presentes na área. O levantamento fitossociológico é uma importante ferramenta para auxiliar na escolha do melhor método de controle e quando realizá-lo. O objetivo deste estudo foi realizar levantamento fitossociológico de plantas daninhas em monocultivo de açaizeiro solteiro no município de Rio Branco, Acre. O estudo foi realizado no campo experimental da Embrapa Acre em março de 2014. As amostragens foram realizadas com um quadrado de madeira de 0,25 m2 (0,50 x 0,50 m), o qual foi lançado ao... |
| Tipo: Artigo de periódico |
Palavras-chave: Control de malezas; Fitosociología; Embrapa Acre; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Açaí; Erva Daninha; Controle Cultural; Campo Experimental; Euterpe precatoria; Weed control; Phytosociology. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115084 |
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| COSTA, W. A. da; LIMA, C. E. P. de; SOUSA, S. H. B. de; OLIVEIRA, M. S. de; BEZERRA, F. W. F.; CRUZ, J. N. da; SILVA, S. G.; CORDEIRO, R. M.; RODRIGUES, C. C.; CARVALHO, A. R. B. de; BEZERRA, P. do N.; SARGES, P. A. de A.; PEREIRA, D. S.; SOUZA FILHO, A. P. da S.; CARVALHO JUNIOR, R. N. de. |
| One of the main reasons for environmental disturbances such as declination in pasture productivity and biodiversity losses is the high infestation of herbaceous weeds, generally referred to as ?Juquira? in the Amazon region. If they are not adequately controlled, such infestation might lead to degradation of pasture, resulting in complete loss of productivity and subsequent abandonment of the area. In this sense, this chapter aims to describe the main invasive species present in the Amazon region, as well as to characterize both the old and innovative techniques of use in agriculture, in large and small scale, for the control of agricultural pests. |
| Tipo: Parte de livro |
Palavras-chave: Planta daninha; Controle; Agricultura; Infestação; Weed control; Amazonia; Agriculture. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118325 |
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| 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 |
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| 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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| Registros recuperados: 115 | |
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