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| Registros recuperados: 136 | |
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| 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: 5.01.03.00-8 Atlantic; Herbicide; Physiological disorder; Solanum tuberosum. Matologia. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35355 |
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| Garagorry, Fábio Cervo; UFSM; Quadros, Fernando Luiz Ferreira de; UFSM; Travi, Magdalena Reschke Lajús; UFSM; Bandinelli, Duílio Guerra; UFSM; Fontoura Júnior, José Acélio; UFSM; Martins, Carlos Eduardo Nogueira; UFSM. |
| Objetivou-se avaliar a produção animal de novilhos e vegetal de campo natural e de campo natural sobre-semeado com azevém (Lolium multiflorum), trevo branco (Trifolium repens) e cornichão (Lotus corniculatus) com e sem a utilização do herbicida glyphosate. Os tratamentos foram: CN – campo nativo, com roçada anual; CNI – campo nativo com sobre-semeadura, adubação e roçada anual; G1 – Idem ao CNI com aplicação de herbicida no primeiro ano; G3 – idem ao G1 com supressão da vegetação natural com herbicida no segundo e terceiro ano; GA3 – Idem ao G3 com adubação duplicada nos três anos. O delineamento experimental foi blocos completamente casualizados com duas repetições. Os resultados apresentados são do terceiro ano de avaliação. Para ganho médio diário,... |
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Palavras-chave: 5.04.04.00-8 Pastagem e Forragicultura introdução de espécies; Herbicida; Adubação; Pastagem natural; Ganho por área; Sobre-semeadura. species introduction; Herbicide; Fertilization; Natural pasture; Gain per area; Sod seeding. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/4674 |
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| Shiogiri, Natália Sayuri; UNESP; Carraschi, Silvia Patrícia; Unesp; Cubo, Patrícia; Unesp; Schiavetti, Bárbara Lopes; Unesp; Cruz, Claudinei da; Unesp; Pitelli, Robinson Antonio; Unesp. |
| Aquatic macrophytes are important components of aquatic ecosystems, but these plants have become a problem due to their occurrence in different regions. Some studies aimed to demonstrate the effectiveness of herbicides to control these macrophytes; however, few studies report the possible ecotoxicological effects. The objective of this study was to estimate the acute toxicity (LC (I)50;96h) and assess water quality variables for glyphosate in the Rodeo® formulation, Aterbane® BR surfactant and mixtures of glyphosate + 0.5% and 1.0% of surfactant, for the guaru fish (Phallocerus caudimaculatus). The guaru was exposed to increasing concentrations of glyphosate and a mixture of glyphosate + 0.5 and 1.0% of surfactant. The mixture of glyphosate... |
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Palavras-chave: Tropical fish; Toxicity; Herbicide tropical fish; Toxicity; Herbicide. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/6795 |
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| Aliasgarian, Saeed. |
| Conservation tillage due to some properties such as reduction in time and energy required for seedbed preparation is going to be an unavoidable choice in region with arid and semiarid climate. This research was conducted at Murchehkhort farms, central region of Iran to energetic, economics and environmental evaluation of different tillage systems. The study was planned as a completely randomized block design with three tillage treatments replicated three times. The tillage treatments were: no-tillage (NT): direct drilling, reduced tillage (RT): chisel plow and roller packing as a combined machine followed by a light disking and drilling; and Conventional tillage (CT): moldboard plow followed by two heavy harrow diskings and drilling. NT Compared to CT and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: No-tillage; Reduced tillage; Energy efficiency; Gross margin; Herbicide. |
| Ano: 2017 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4049 |
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| Petter,Fabiano André; Ferreira,Tamara Santos; Sinhorin,Adilson Paulo; Lima,Larissa Borges de; Morais,Leidimar Alves de; Pacheco,Leandro Pereira. |
| ABSTRACT The objective of this study was to verify the kinetics of sorption and desorption of diuron in an Oxisol under application of biochar. The samples were collected in a field experiment conducted in randomized design blocks consisted of 2 base fertilization levels (0 and 400 kg∙ha−1 NPK 00-20-20 fertilizer formula) and 3 doses of biochar (0, 8 and 16 Mg∙ha−1). In the evaluation of sorption and desorption, Batch Equilibrium method was used. The kinetics of sorption and desorption of diuron, total organic carbon, fulvic acid, humic acid and humin, pH and partition coefficient to organic carbon were evaluated. The Freundlich isotherm was adjusted appropriately to describe diuron sorption kinetics in all the studied treatments. The application of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaching; Persistence; Soil organic matter; Herbicide; Pyrogenic carbon. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000400487 |
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| Melo,Christiane Augusta Diniz; Souza,Wendel Magno de; Carvalho,Felipe Paolinelli de; Massenssini,André Marcos; Silva,Antonio Alberto da; Ferreira,Lino Roberto; Costa,Maurício Dutra. |
| ABSTRACT Phytostimulation plays a key role in the process of rhizodegradation of herbicides in soil. Additionally, bio-enhancement associated with phytoremediation may increase the efficiency of the decontamination process of soils with herbicides. Therefore, the objective of this study was to evaluate the biomass and microbial activity of soil contaminated with sulfentrazone and cultivated with phytoremediator species plus a bacterial consortium. The experiment was conducted in a greenhouse, carried out with a 2 × 4 × 4 completely randomized factorial design with 4 replications. The first factor consisted of the presence or absence of bio-enhancement with a bacterial consortium composed of Pseudomonas bacteria; the second factor consisted of a monoculture... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bio-enhancement; Phytostimulation; Herbicide; Metabolic quotient; Microbial quotient. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000200300 |
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| Martins,Paula Fabiane; Martinez,Camila Ortiz; Carvalho,Giselle de; Carneiro,Paulo Irajara Borba; Azevedo,Ricardo Antunes; Pileggi,Sônia Alvim Veiga; Melo,Itamar Soares de; Pileggi,Marcos. |
| The aim of this work was to study herbicide degradation through selected microorganisms from humus and soil subjected to different plantation systems. The following bacterial species were identified: Klebsiella pneumoniae pneumoniae GC s.B strain 1, Pseudomonas alcaligenes, Enterobacter aerogenes GC s.A and Klebsiella pneumoniae pneumoniae GC s.B strain 2. Growth studies yet suggested the possibility of a very long lag phase. Although, culture with the herbicide presented biofilm formation and there were color changes in the herbicide that could have interfered with the espectrophotometry readings. After 5 days of incubation at 35ºC, the difference in the concentration of herbicide was 14.42% on average and after 10 days, 35.01%. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioremediation; Biodegradation; S-Metolachlor; Herbicide. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100019 |
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| Martinez,Camila O.; Silva,Celia Maria M. S.; Fay,Elisabeth F.; Abakerli,Rosangela B.; Maia,Aline H. N.; Durrant,Lucia R.. |
| Sulfentrazone is amongst the most widely used herbicides for treating the main crops in the State of São Paulo, Brazil, but few studies are available on the biotransformation of this compound in Brazilian soils. Soil samples of Rhodic Hapludox soil were supplemented with sulfentrazone (0.7 µg active ingredient (a.i.) g-1 soil) and maintained at 27ºC. The soil moisture content was corrected to 30, 70 or 100 % water holding capacity (WHC) and maintained constant until the end of the experimental period. Herbicide-free soil samples were used as controls. Another experiment was carried out using soil samples maintained at a constant moisture content of 70% WHC, supplemented or otherwise with the herbicide, and submitted to different temperatures of 15, 30 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide; Degradation; Microorganisms; Half-life. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100030 |
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| Cerdeira,Antonio Luiz; Paraíba,Lourival Costa; Queiroz,Sonia Claudia Nascimento de; Matallo,Marcus Barifouse; Franco,Daniel Andrade de siqueira; Ferracini,Vera Lúcia. |
| Sugarcane is an important crop for sugar and biofuel production in Brazil. Growers depend greatly on herbicides to produce it. This experiment used herbicide physical-chemical and sugarcane plant physiological properties to simulate herbicide uptake and estimate the bioconcentration factor (BCF). The (BCF) was calculated for the steady state chemical equilibrium between the plant herbicide concentration and soil solution. Plant-water partition coefficient (sugarcane bagasse-water partition coefficient), herbicide dilution rate, metabolism and dissipation in the soil-plant system, as well as total plant biomass factors were used. In addition, we added Tebuthiuron at rate of 5.0kg a.i. ha-1 to physically test the model. In conclusion, the model showed the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide; Bioconcentration factor; Plant uptake; Model; Bagasse adsorption. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000400591 |
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| Salbego,Joseânia; Pretto,Alexandra; Silva,Vera Maria Machado da; Loro,Vania Lucia; Lazzari,Rafael; Gioda,Carolina Rosa; Baldisserotto,Bernardo. |
| The effects of glyphosate, a nonselective herbicide (1.0 or 5.0mg L-1) on digestive enzymes activity (stomach and intestine) were evaluated in juveniles of piava (Leporinus obtusidens) after 90 days of exposure. The activity of acid protease, trypsin, chymotrypsin and amylase increased with the increase of glyphosate concentration. These results indicate that glyphosate affects digestive enzyme activities in this species, and may be an indicator of poor nutrient availability when fish survive in herbicide-contaminated water. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Herbicide; Acid protease; Amylase; Trypsin. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000901603 |
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| Santos,Tatiele Pereira dos; Menezes,Claubert Wagner Guimarães de; Batista,Carlos Henrique; Brito,Eliane Souza Gomes; Tavares,Wagner de Souza; Zanuncio,José Cola. |
| ABSTRACT Trichogramma pretiosum Riley, 1879 (Hymenoptera: Trichogrammatidae) is an egg parasitoid of lepidopteran pests in corn, Zea mays L. (Poaceae), in Brazil. Chemical products used in agriculture can be toxic to this biocontrol agent. The objective of the present study was to evaluate the longevity, parasitism and emergence of T. pretiosum parasitizing Mediterranean flour moth, Anagasta kuehniella Zeller, 1879 (Lepidoptera: Pyralidae), eggs treated with herbicide solutions with the active ingredients (chemical group) atrazine (triazines), paraquat dichloride (bipyridylium) and nicosulfuron (sulfonylurea). Pure distilled water was used as a negative control, and a solution of a product with λ-cyhalothrin + thiamethoxam (pyrethroid + neonicotinoid,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biocontrol agent; Emergence; Herbicide; Longevity; Parasitism.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100241 |
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| Registros recuperados: 136 | |
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