|
|
|
| Registros recuperados: 136 | |
|
|
| SILVA,E.M.G.; FARIA,A.T.; MARULANDA,N.M.E.; PEREIRA,G.A.M.; SARAIVA,D.T.; REIS,M.R.; SILVA,A.A.. |
| ABSTRACT: Before recommending an herbicide, it is necessary to know its interactions with the soil attributes that will influence its sorption and half-life in the soil. This knowledge is an essential condition for minimizing any negative effects that may result from its application. However, due to the great diversity of soil and climate in Brazil, especially for products of recent use in the country, such as the herbicide tembotrione, this knowledge is often not available. This may be the main cause of occurrence of intoxication reports in crops carried out in succession to corn sprayed with this herbicide. In order to reduce possible impacts on successor crops and the contamination of surface and groundwater using the high-performance liquid... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide; Environmental impact; Persistence in soil. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100271 |
| |
|
|
| AMÉRICO,G.H.P.; AMÉRICO-PINHEIRO,J.H.P.; FURLANI JR,E.. |
| ABSTRACT: The aim of this study was to evaluate the hormesis effect of sub-doses of dichlorophenoxy acetic acid herbicide and the plant growth regulator mepiquat chloride on the vegetative and productive characteristics of two cotton cultivars (FMT 701 and Fibermax 966). The experiment was conducted from November 2013 to May 2014. The experimental design was a randomized block in a factorial scheme 6 x 2 x 2, with four replications, totaling 96 installments with 24 treatments: the witness and five sub-doses of the herbicide 2,4-D: 0.68, 1.36, 2.04, 2.72 and 3.40 g equivalent acid (e.a) per ha, with and without application of mepiquat chloride at a dose of 200 mL ha-1 in the cotton cultivars FMT 701 and Fibermax 966. The sub-doses applied were 2,4-D at 45... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypium hirsutum; Herbicide; Growth regulator. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100277 |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Prata,Fábio; Lavorenti,Arquimedes; Regitano,Jussara Borges; Vereecken,Harry; Tornisielo,Valdemar Luiz; Pelissari,Adelino. |
| The behavior of glyphosate in a Rhodic Oxisol, collected from fields under no-till and conventional management systems in Ponta Grossa, Parana state (Brazil) was investigated. Both agricultural systems had been in production for 23 years. Glyphosate mineralization, soil-bound forms, sorption and desorption kinetics, sorption/desorption batch experiments, and soil glyphosate phythoavailability (to Panicum maximum) were determined. The mineralization experiment was set up in a completely randomized design with a 2 x 2 factorial scheme (two management systems and two 14C radiolabelled positions in the glyphosate), with five replicates. 14CO2 evolution was measured in 7-day intervals during 63 days. The glyphosate sorption kinetics was investigated in a batch... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide; Sorption; Degradation; Mineralization; Phytotoxicity; Panicum maximum. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832005000100007 |
| |
|
| |
|
|
| Cangussú,Lucas V. de S.; David,Andréia M. S. de S.; Araújo,Eduardo F.; Alves,Rayane A.; Nunes,Rebeca A.; Amaro,Hugo T. R.. |
| ABSTRACT Early harvest may decrease seed exposure in the field after physiological maturation. The objective of this study was to evaluate the effect of glyphosate desiccant at different plant desiccation times at pre-harvest on the physiological quality of crambe (Crambe abyssinica Hochst) seeds. The experimental design was completely randomized in a 2 x 4 factorial scheme, involving the application of glyphosate desiccant in the plants at pre-harvest and the control (without plant desiccation) and four desiccation times, with three replicates per treatment. The desiccation of crambe plants at pre-harvest with glyphosate was efficient, positively affecting seed germination and vigor. Application of the desiccant in the plants, with 90% of brown seeds, at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crambe abyssinica; Brassicaceae; Maturation; Herbicide; Germination. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800577 |
| |
|
|
| Albrecht,Leandro Paiola; Barbosa,André Prechlak; Silva,André Felipe Moreira; Mendes,Matheus Akiyama; Albrecht,Alfredo Júnior Paiola; Ávila,Marizangela Rizzatti. |
| In consequence of several studies and speculations concerning the issue of RR transgenic soybean after the application of glyphosate, additional scientific investigations became necessary to clarify the actual viability of the product use when applied in different developmental stages of the soybean crop. Therefore, this study was aimed to evaluate the physiological quality as well as seed health quality of RR soybean subjected to application of the herbicide glyphosate in different phonological stages of the transgenic soybean, cultivar CD 219RR. For this, an experiment with a complete block experimental design with treatments randomly distributed within the block, with four replications, was carried out. The assessed treatments were foliar sprayings of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Transgenic seed; Performance; Herbicide. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000300003 |
| |
|
|
| Silva,Fabiana Mota da; Unêda-Trevisoli,Sandra Helena; Villela,Otávia Tiago; Perecin,Dilermando; Mauro,Antonio Orlando Di. |
| Due to the large increase in the area cultivated with genetically modified soybean in Brazil, it has become necessary to determine methods that are fast and efficient for detecting these cultivars. The aim of this work was to test the efficiency of the toothpick method in the detection of RR soybean plants, as well as to distinguish between cultivars, for sensitivity caused by herbicide. Ten transgenic soybean cultivars, resistant to the active ingredient glyphosate, and ten conventional soybean cultivars were used. Toothpicks soaked in glyphosate were applied to all the plants at stage V6 and evaluations were made at 2, 4, 6, 8 and 10 days after application (DAA). The effects of the glyphosate on the cultivars, and the symptoms of phytotoxicity caused in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Phytotoxicity; Glyphosate; Toothpick method; Herbicide. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200436 |
| |
|
| |
|
|
| Hernández,Marcela; Morgante,Verónica; Flores,Cecilia; Villalobos,Patricio; González,Myriam; Miralles,Pola; Dinamarca,Alejandro; Seeger,Michael. |
| The extensive use of s-triazine herbicides in diverse countries causes environmental and health concern. Simazine and atrazine are s-triazines widely used in agriculture and forestry. Although, natural dissipation of s-triazines in soils by physicochemical processes has been described, the main mechanism for their removal is biological degradation by microorganisms. Bioremediation is a successful strategy for the removal of i-triazines in soil. For bioaugmentation processes, s-triazine-degrading bacteria are required, which isolation from agricultural soils was described in this report. Studies of s-triazine adsorption and leaching in soil are useful to determine the bioavailability of these herbicides. The detection of s-triazine-degrading catabolic... |
| Tipo: Journal article |
Palavras-chave: Í-triazine; Simazine; Biodegradation; Bioremediation; Herbicide. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000200004 |
| |
|
|
| Alves,Pedro Luís da Costa Aguiar; Marques Júnior,José; Ferraudo,Antonio Sergio. |
| In the soil, herbicides are submitted to absorption, leaching and degradation by physical, chemical and biological processes or absorbed by plants. All these processes are dependent on soil class and weather conditions and affect the product efficiency on weed control. The objective of this work was to investigate the influence of soil attributes on sulfentrazone efficiency for controlling purple nutsedge (Cyperus rotundus L. ). Soil samples from LVAd (Typic Haplustox), LVd, LVdf and LVef (Typic Haplustox and Typic Eutrustox), NVe (Rhodic Kandiustalf), and LVd (Typic Haplustox) were collected under two crop conditions aiming to have different clay, Fe oxides, and organic matter contents. The soil samples were submitted to granulometric, chemical and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide; Adsorption; Fe oxide; Classes of soils. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000300014 |
| |
|
|
| Prata,Fábio; Cardinali,Vanessa Camponez do Brasil; Lavorenti,Arquimedes; Tornisielo,Valdemar Luiz; Regitano,Jussara Borges. |
| The sorption of glyphosate by soils occurs due to the inner sphere complex formation with metals of soil oxides, which are related to the soil phosphate adsorption capacity. The aim of this study was to evaluate the effects of increasing rates of phosphorus on sorption and desorption of glyphosate in three soils with different mineralogical attributes. Soils were a Rhodic Kandiudalf, an Anionic Acrudox and a Typic Humaquept. Soil samples were amended with KH2PO4 at equivalent rates of 0; 1,000; 5,000; 20,000 and 50,000 kg ha-1 of P2O5, which are high from the agricultural point of view, but necessary in order to perform sorption and desorption studies. The experimental design consisted of a completely randomized factorial: 2 soils x 5 phosphorus rates and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide; Retention; Bound residue; Phosphate; Oxides. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100026 |
| |
|
|
| Souza,M.D. de; Basssoi,L.H.; Bacchi,O.O.S.; Reichardt,K.; Hermes,L.C.; Abakerli,R.B.; Pilotto,J.E.. |
| Atrazine displacement was studied in a soil profile as a function of water movement and time after herbicide application, taking into account possible influence of preferential flow on leaching. The experiment consisted of two 7 x 7m plots of a dark red latosol (Kanduidalfic Eutrudox), located at Piracicaba, SP, Brazil (22º 43'S and 47º 25'W), 250km inside continent, at an altitude of 580m. One plot was previously treated with 1,000 kg/ha of lime, in order to increase base saturation to 88%, and 500kg/ha of gypsum. Each plot was instrumented with tensiometers, neutron probe access tubes and soil solution extractors, in order to monitor water and atrazine flows. Atrazine was applied at the high rate of 6 kg/ha of active principle. Results showed intensive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atrazine; Leaching; Preferential flow; Adsorption; Herbicide; Tropical soil. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000300013 |
| |
|
|
| NOVO,M.C.S.S.; CRUZ,L.S.P.; PEREIRA,J.C.V.N.A.; NAGAI,V.. |
| Foi realizado experimento em Ribeirão Preto, SP, com o objetivo de avaliar a necessidade de inocular sementes de amendoim (Arachis hypogaea L. cv Tatu) e o efeito de herbicidas aplicados em pós-emergência no crescimento da planta, na nodulação, na fixação simbiótica do nitrogênio e na produtividade. O experimento foi em parcelas subsubdivididas com as parcelas principais dispostas em blocos ao acaso, com quatro repetições. Nas parcelas estudou-se o efeito da inoculação das sementes. Nas subparcelas, além do tratamento testemunha, aplicou-se os herbicidas fomesafen (250 g/ha), lactofen (192 g/ha), fluazifop-p-butil (187 g/ha), haloxifop-metil (240 g/ha) e a mistura fomesafen (250 g/ha) + fluazifop-p-butil (187 g/ha). Não houve efeito de herbicidas na massa... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis hypogaea L.; Inoculação de sementes; Nodulação; Herbicide. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161998000200017 |
| |
|
| |
|
|
| 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 |
| |
|
|
| Reis, Marcelo Rodrigues; Aquino, Leonardo Ângelo; Melo, Christiane Augusta Diniz; Silva, Daniel Valadão; Dias, Roque Carvalho. |
| Crop rotation improves potato (Solanum tuberosum L.) crops; however, in some cases, it can have some negative effects due to the herbicides previously used in crops under rotation. These effects are the decline in the yield and the appearance of physiological disorders, including cracked tubers, which impair the quality and economic value of the potato. Two field experiments were performed with applications of tembotrione and atrazine, alone or in combination. In the Rio Paranaiba (Minas Gerais State) area, in clay soil, the herbicides were applied at post-emergence in corn (Zea mays L.). After corn harvest and soil preparation, the potatoes were planted. In the Serra do Salitre (Minas Gerais State) area, in the medium texture soil, the herbicides were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic; Herbicide; Physiological disorder; Solanum tuberosum.; Matologia. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35355 |
| |
| Registros recuperados: 136 | |
|
|
|
