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Pesquisa : B01.650.940.800.575.912.250.401.750 [Categoria DeCS]
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Id: biblio-1039135
Autor: Pereira, Fernanda Aparecida Castro; Vello, Natal Antonio; Rocha, Gabriela Antônia de Freitas; Nekatschalow, Marcos Custódio.
Título: Combining Ability for Resistance to White Mold in a Diallel Cross of Soybean
Fonte: Braz. arch. biol. technol;62:e19170610, 2019. tab.
Idioma: en.
Resumo: Abstract The white mold, caused by Sclerotinia sclerotiorum (Lib.) de Bary, is one of the most important diseases of soybean. The objective of the present work was to evaluate the soybean reaction to the fungus S. sclerotiorum, which causes white mold, in a partial diallel with 50 crosses. The Group I of parents was composed of ten experimental lines with high grain yield and the group II consisted in five genotypes with possible resistance to white mold. Ten plants of each cross in the F4 generation and the parents were evaluated for reaction to fungus infection using the method of inoculation in detached leaves in order to assess the severity of the disease and to later estimate the combining abilities. Estimates of the specific combining ability (SCA) was a significant reaction to S. sclerotiorum, indicating that there is variability for fungus resistance due to non-additive genes action.
Descritores: Doenças das Plantas/microbiologia
Ascomicetos
Soja/microbiologia
-Inoculantes Agrícolas
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


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Id: biblio-1154767
Autor: Ramos, Luís Felipe Costa; Rangel, João Henrique de Oliveira; Andrade, Guilherme Caldas; Lixa, Carolina; Castilho, Livia Vieira Araujo de; Nogueira, Fábio César Sousa; Pinheiro, Anderson S; Gomes, Fabio Mendonça; AnoBom, Cristiane Dinis; Almeida, Rodrigo Volcan; Oliveira, Danielle Maria Perpétua de.
Título: Identification and recombinant expression of an antimicrobial peptide (cecropin B-like) from soybean pest Anticarsia gemmatalis
Fonte: J. venom. anim. toxins incl. trop. dis;27:e20200127, 2021. graf, tab.
Idioma: en.
Resumo: Insects can be found in numerous diverse environments, being exposed to pathogenic organisms like fungi and bacteria. Once these pathogens cross insect physical barriers, the innate immune system operates through cellular and humoral responses. Antimicrobial peptides are small molecules produced by immune signaling cascades that develop an important and generalist role in insect defenses against a variety of microorganisms. In the present work, a cecropin B-like peptide (AgCecropB) sequence was identified in the velvetbean caterpillar Anticarsia gemmatalis and cloned in a bacterial plasmid vector for further heterologous expression and antimicrobial tests. Methods AgCecropB sequence (without the signal peptide) was cloned in the plasmid vector pET-M30-MBP and expressed in the Escherichia coli BL21(DE3) expression host. Expression was induced with IPTG and a recombinant peptide was purified using two affinity chromatography steps with Histrap column. The purified peptide was submitted to high-resolution mass spectrometry (HRMS) and structural analyses. Antimicrobial tests were performed using gram-positive (Bacillus thuringiensis) and gram-negative (Burkholderia kururiensis and E. coli) bacteria. Results AgCecropB was expressed in E. coli BL21 (DE3) at 28°C with IPTG 0.5 mM. The recombinant peptide was purified and enriched after purification steps. HRMS confirmed AgCrecropB molecular mass (4.6 kDa) and circular dichroism assay showed α-helix structure in the presence of SDS. AgCrecropB inhibited almost 50% of gram-positive B. thuringiensis bacteria growth. Conclusions The first cecropin B-like peptide was described in A. gemmatalis and a recombinant peptide was expressed using a bacterial platform. Data confirmed tertiary structure as predicted for the cecropin peptide family. AgCecropB was capable to inhibit B. thuringiensis growth in vitro.(AU)
Descritores: Peptídeos
Soja/microbiologia
Proteínas Citotóxicas Formadoras de Poros/classificação
Cecropinas/administração & dosagem
-Sistema Imunitário
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Id: biblio-1132210
Autor: Silva, Mariana Aguiar; Nascente, Adriano Stephan; Filippi, Marta Cristina Corsi de; Lanna, Anna Cristina; Silva, Gisele Barata da; Fernandes, João Pedro Tavares; Elias, Marina Teixeira Arriel.
Título: Screening of Beneficial Microorganisms to Improve Soybean Growth and Yield
Fonte: Braz. arch. biol. technol;63:e20190463, 2020. tab.
Idioma: en.
Projeto: CNPq; . FAPEG.
Resumo: Abstract The objective of this research was to identify the best microorganisms, alone or in mixture for total biomass gain (root + shoot), positive change in gas exchange, nutrient uptake (root, shoot and grain) and yield and yield components in the soybean crop. Trial under greenhouse conditions had the experimental design in a completely randomized scheme with 26 treatments and four replicates. The treatments consisted of the rhizobacteria BRM 32109, BRM 32110 and 1301 (Bacillus sp.), BRM 32111 and BRM 32112 (Pseudomonas sp.), BRM 32113 (Burkholderia sp.), BRM 32114 (Serratia sp.), Ab-V5 (Azospirillum brasilense) and 1381 (Azospirillum sp.), and the fungus Trichoderma asperellum (a mix of the isolates UFRA.T06, UFRA.T09, UFRA.T12 and UFRA.T52). Besides, the same isolates were combined in pairs, completing 16 combinations. Control treatments received no microorganism. Microorganisms applied isolated or in combination, provided biomass gain, positive gas exchange, increases in nutrients uptake at the shoot and grain, and improved grain yield and its components than control plants. Stood out the combination Ab-V5 + T. asperellum pool, which provided a 25% improvement in grain yield.
Descritores: Sementes/crescimento & desenvolvimento
Soja/crescimento & desenvolvimento
Soja/microbiologia
-Biomassa
Responsável: BR1.1 - BIREME


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Id: biblio-1132254
Autor: Salazar, Ludmila Noskoski; Astolfi, Viviane; Ogimbosvski, Tailan Antonio; Daronch, Naionara Ariete; Zeni, Jamile; Junges, Alexander; Cansian, Rogério Luis; Backes, Geciane Toniazzo.
Título: Newly Isolated Penicillium sp. for Cellulolytic Enzyme Production in Soybean Hull Residue
Fonte: Braz. arch. biol. technol;63:e20170710, 2020. tab, graf.
Idioma: en.
Resumo: Abstract (1) Background: The aim of this study was to evaluate the production and partial characterization of xylanase and avicelase by a newly isolated Penicillium sp. in solid-state fermentation, using soybean hulls as substrate. (2) Methods: Temperature, time, number of spores, and substrate moisture on xylanase and avicelase bioproduction were evaluated, maximizing activity with 30°C, 1x106 spores/g substrate, 14 and 7 days of fermentation with 70 and 76% substrate moisture contents, for xylanase and avicelase, respectively. (3) Results: Different solvents, temperatures, and agitation in the enzymatic extraction were evaluated, obtaining higher activities, 430.77 and 26.77 U/g for xylanase and avicelase using 30 min extraction and 0.05 M citrate buffer solution (pH 4.5 ), respectively at 60°C and 175 rpm and 50°C and 125 rpm. The optimum pH and temperature for enzymatic activity determination were 5.3 and 50°C. Enzyme extract stability was evaluated, obtaining higher stability with pH between 4.5 and 5.5, higher temperature of up to 40°C. The kinetic thermal denaturation (Kd), half-life time, D-value, and Z-value were similar for both enzymes. The xylanase Ed value (89.1 kJ/mol) was slightly lower than the avicelase one (96.7 kJ/mol), indicating higher thermostability for avicelase. (4) Conclusion: In this way, the production of cellulases using alternative substrates is a way to reduce production costs, since they represent about 10% of the world demand of enzymes, with application in animal feed processing, food production and breweries, textile processing, detergent and laundry production, pulp manufacturing and the production of biofuels.
Descritores: Penicillium/isolamento & purificação
Penicillium/enzimologia
Soja/microbiologia
Xilosidases/biossíntese
Celulases/biossíntese
-Temperatura
Fatores de Tempo
Substratos para Tratamento Biológico
Responsável: BR1.1 - BIREME


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Id: biblio-1142506
Autor: Zanella, Rodrigo; Zdziarski, Andrei Daniel; Meira, Daniela; Bozi, Antonio Henrique; Lippstein, Eduardo Rafael; Colonelli, Lucas Leite; Fernandes, Rogê Afonso Tolentino; Fernandes, Vinícius Kunz; Benin, Giovani; Cassol, Luís César.
Título: System Fertilization: a Viable Practice for Black Oat-soybean Crop
Fonte: Braz. arch. biol. technol;63(spe):e20190063, 2020. tab, graf.
Idioma: en.
Resumo: Abstract System fertilization is characterized by partial or total fertilizer application at the predecessor crop; and it can be a viable practice to soybean crop. This study aimed to determine the fertilizer management and fertilizer levels for black oat-soybean cropping system, in high fertility soils and no-tillage system. The field trial was conducted in a bifactorial scheme, consisting of six environments, by combination of locations (Bom Sucesso do Sul - Paraná, Itapejara d'Oeste - Paraná) and fertilization management (all fertilization in black oat; splitting with 50% in black oat and 50% in soybean, all fertilization in soybean), and four fertilizer levels (0, 100, 200 and 300%) defined according to soil analysis and production expected. The evaluated traits were dry mass production, N, P and K nutrient accumulation of straw, dry mass remaining of black oat crop; and plant height, number of pods per plant, thousand grain weight, grain yield for soybean crop. Higher black oat dry mass production was observed at higher fertilization level. The fertilizer anticipation in black oat crop had better performance. Phosphorus and potassium accumulation increased linearly with fertilizer level increase. For N, the highest accumulated value occurred at the 200%, decreasing at the 300% of fertilizer level. The soybean crop had no influence in grain yield considering fertilization management, anticipation or splitting, and fertilizer levels. Thus, the system fertilization can be a viable practice, and favor black oat dry mass production and soybean development.
Descritores: Soja/crescimento & desenvolvimento
Análise do Solo
Avena/crescimento & desenvolvimento
Fertilizantes
-Fósforo/análise
Potássio/análise
Produção Agrícola/métodos
Nitrogênio/análise
Limites: Humanos
Responsável: BR1.1 - BIREME


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Id: biblio-1142508
Autor: Barth, Gabriel; Gotz, Lenir Fátima; Favaretto, Nerilde; Pauletti, Volnei.
Título: Does Dairy Liquid Manure Complementary to Mineral Fertilization Increase Grain Yield Due to Changes in Soil Fertility?
Fonte: Braz. arch. biol. technol;63(spe):e20190537, 2020. tab, graf.
Idioma: en.
Resumo: Abstract The main destination of manure is the application to croplands near livestock farms as nutrient source to enhance crop production. The aim of this study was to define the dairy liquid manure (DLM) dose, complementary to the mineral fertilizer, for higher crops yield, in rotation black oat-maize-wheat-soybean, and to identify the soil chemical variables improved by the manure that most affect the yield, in long-term. The experiment was conducted from 2006 to 2015, in no-tillage system, at Paraná State, Brazil. The soil was a Latossolo Bruno Distrófico típico, clayey texture. The treatments consisted by doses of DLM (0, 60, 120 and 180 m3 ha-1 year-1), complementary to the mineral fertilizer (applied in the same amount for all DLM doses). Crops yield and soil chemical variables were evaluated at six depths (0-10; 10-20; 20-30; 30-40; 40-50 and 50-60 cm). The DLM application increased the yield of all crops, but not in all harvests. The DLM even applied at soil surface improved the soil chemical variables in deep layers, resulting in high positive correlation between yield and exchange bases, P, Zn and Mn contents, and high negative correlation with Ca/Mg ratio and potential acidity at depth 0-10 cm. The DLM dose, complementary to the mineral fertilization, that provided higher soybean and wheat yield was about 130 m3 ha-1 year-1, while for maize this dose was equal to or greater than 180 m3 ha-1 year-1. This effect was not attributed to a single chemical variable but the improvement of all chemical variables evaluated.
Descritores: Solo/química
Fertilizantes
Produção Agrícola/métodos
Esterco
-Fósforo/análise
Soja
Triticum
Carbono/análise
Avena
Produtos Agrícolas
Zea mays
Fazendas
Minerais/análise
Nitrogênio/análise
Limites: Humanos
Animais
Responsável: BR1.1 - BIREME


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Id: biblio-1142509
Autor: Barbosa, Graziela Moraes de Cesare; Costa, Antonio; Costa, Marco Aurélio Teixeira; Oliveira, José Francirlei de.
Título: Increasing the Productive Potential of an Ultisol using Cover Crops and Organic and Mineral Fertilization
Fonte: Braz. arch. biol. technol;63(spe):e20190495, 2020. tab, graf.
Idioma: en.
Resumo: Abstract The occupation of sandy soils in Brazil has occurred with poor adoption of management technology, which has caused its degradation. The recovery of organic matter, particularly when growing annual plants and cover crops, with mulch residue allows the maintenance of the productive potential of these soils. Thus, the shoot dry mass production (SDMP) of winter cover crops was evaluated in an Ultisol under no-tillage system and in rotation with soybean and maize using 0, 2, 4 and 8 t ha-1 year-1 of poultry litter, mineral fertilizer exclusively and 2 t ha-1 year-1 of poultry litter associated with a half-dose of mineral fertilizer. The experimental design included randomized blocks with four replicates. The use of poultry litter increased the SDMP of the cover crops; the production was relatively high when high doses of poultry litter were applied; on the other hand, the yield of SDMP and grain was limited by the exclusive use of mineral fertilizer. Organic matter and nutrient status improvement by cover crops were one of the reasons for the increase in soybean and maize grain yields.
Descritores: Nutrientes
Solos Arenosos/análise
Agricultura/métodos
Matéria Orgânica
Fertilizantes
Minerais
-Soja
Produtos Agrícolas
Zea mays
Limites: Humanos
Animais
Responsável: BR1.1 - BIREME


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Id: biblio-1148247
Autor: Kabas, Onder; Kocaturk, Mehmet; Ozkan, Cevdet Fehmi; Gumrukcu, Emine; Canakci, Murad; Karayel, Davut.
Título: Effects of different soil tillage-sowing systems on plant development and emergence traits of second crop soybean / Efeitos de diferentes sistemas de semeadura direta no solo e desenvolvimento de plantas e características de emergência de soja segunda safra
Fonte: Biosci. j. (Online);36(6):2092-2107, 01-11-2020. tab.
Idioma: en.
Resumo: Effects of different soil tillage and sowing systems (Conventional Soil Tillage ­ CST: Moldboard plow + gobble disc + disk harrow + harrow + sowing machine; Reduced Soil Tillage ­ RST: rototiller-combined soil tillage machine + sowing machine; Ridge Sowing ­ RS: gobble disc + ridge-sowing machine; Direct Sowing ­ DS ­ no-till) on plant development and emergence traits of second-crop soybean were investigated in this study under Antalya provincial conditions. Experiments were conducted over the experimental fields of the Aksu Branch of Bati Akdeniz Agricultural Research Institute for 3 years (2013, 2014, 2015) as a fixed experiment. The number of days to 50% emergence, number of days to 50% flowering, plant height, number of pods per plant, the first pod height, number of plants per m2, 1000-seed weight, and yield were considered as plant development parameters. Mean emergence time, germination rate index, emergence ratio, space ratio, tillering ratio, and acceptable plant spacing ratio were considered as plant emergence parameters. Different soil tillage and sowing systems generally had significant effects on investigated traits at p<0.01 and p<0.05 levels.

Efeitos de diferentes sistemas de preparo do solo e de semeadura (preparo convencional do solo - CST: arado de aiveca + disco de pastilha + grade de disco + grade + semeadora; preparo do solo reduzido - RST: máquina de preparo do solo combinada com rototiller + máquina de semeadura; semeadura em crista - RS: disco de gobble + semeadora em crista; semeadura direta - DS - plantio direto) sobre o desenvolvimento da planta e as características de emergência da soja de segunda safra foram investigadas neste estudo nas condições da província de Antalya. Os experimentos foram conduzidos nos campos experimentais da filial de Aksu do Bati Akdeniz Agricultural Research Institute por 3 anos (2013, 2014, 2015) como um experimento fixo. O número de dias para 50% de emergência, número de dias para 50% de floração, altura da planta, número de vagens por planta, altura da primeira vagem, número de plantas por m2, peso de 1000 sementes e rendimento foram considerados como parâmetros de desenvolvimento da planta. Tempo médio de emergência, índice de taxa de germinação, razão de emergência, razão de espaço, razão de perfilhamento e razão de espaçamento de plantas aceitável foram considerados como parâmetros de emergência das plantas. Diferentes sistemas de preparo do solo e de semeadura geralmente tiveram efeitos significativos nas características investigadas nos níveis p <0,01 e p <0,05.
Descritores: Solo
Soja
Cultivos Agrícolas
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-1148021
Autor: Silva, Renan Cesar Dias da; Silva Junior, Geovani Soares da; Pelá, Adilson; Lana, Regina Maria Quintão; Silva, José Geraldo Mageste da.
Título: Doses, methods and times of application of boron in soybean under field conditions / Doses, métodos e épocas de aplicação de boro na soja sob condições de campo
Fonte: Biosci. j. (Online);36(6):1999-2006, 01-11-2020. graf, tab.
Idioma: en.
Resumo: The boron (B) fertilization in soybean is important to ensure great yields. Boron correction must be applied in deficient soils repairing losses, exports and leaching. The objective of this study was to evaluate the effects of doses, methods and times of application of B in soybean B content and yield. The field experiments were conducted during the 2015/16 and 2016/17 cropping seasons and set as a randomized block design with nine treatments (0, 0.5, 1, 1.5, 2 kg ha-1 of B, 0.5 kg ha-1 of B mixed with NPK (02-28-18) in furrow during sowing, foliar application with 0.3 kg ha-1 of B in V4 soybean stage, foliar application with 0.3 kg ha-1 of B in R1 soybean stage, and foliar application of 0.15 kg ha-1 in V4 plus 0.15 kg ha-1 of B in R1 soybean stage) and four replications. Boric acid was the B source and the variables analyzed were: B leaf content, B exported in seeds, number of pods per plant, number of seeds per pod, weight of 100 seeds (g) and productivity (kg ha-1). The levels of B in leaf were between 30.1 and 43.8 mg kg-1 and between 65.0 and 92.6 mg kg-1 in the 2015/16 and 2016/17 growing season, respectively. Exports of B in seeds were estimated between 166 and 248 g ha-1 and between 208.9 to 260.8 g ha-1 in the 2015/16 and 2016/17 growing season, respectively. Great productivity (3,820 kg ha-1) was observed in the 2016/17 growing season, with an estimated dose of 0.95 kg ha-1 of B.

A fertilização de boro na soja é importante para garantir boas produtividades, corrigir solos deficientes e repor perdas, exportação ou lixiviação. O objetivo deste estudo foi avaliar os efeitos de doses, avaliar modos e épocas de aplicação de B na produtividade da soja. Os experimentos foram implantados na Fazenda Experimental da UEG, Campus Ipameri, nas safras 2015/2016 e 2016/2017 com delineamento em blocos ao acaso, com nove tratamentos e quatro repetições. 0,0; 0,5; 1,0; 1,5; 2,0 kg ha-1 de boro, - 0,5 kg ha-1 de B junto com NPK 2-28-18 no sulco de semeadura; aplicação foliar com 0,3 kg ha-1 de boro em V4; aplicação foliar com 0,3 kg ha-1 de boro em R1; aplicação foliar de 0,150 kg ha-1 em V4 mais 0,150 kg ha-1 de boro em R1. Foi utilizado como fonte o ácido bórico. As variáveis respostas analisadas foram: teor na folha, exportação pelos grãos, número de vagens por planta, número de grãos por vagem, massa de 100 grãos e produtividade. Os teores de B encontrados ficaram entre 30,12 e 43,83 mg kg-1 na folha de soja na safra 2015/2016 e entre 65,0 e 92,6 mg kg-1 na safra 2016/2017. As exportações de Boro foram estimadas entre 166 e 248 g ha-1 e 208,9 a 260,8 g ha-1 na primeira e segunda safra, respectivamente. Houve maior produtividade na segunda safra (3820 kg ha-1) com dose estimada de 0,95 kg ha-1
Descritores: Soja
Boro
Micronutrientes
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-1147941
Autor: Reis, Erlei M; Zanatta, Mateus; Juliatti, Fernando Cezar; Campos, Hercules D; Silva, Luis Henrique Carregal P; Meyer, Maurício C; Nunes Junior, José; Pimenta, Cláudia B; Cassetari Neto, Daniel; Machado, Andréia Q; Utiamada, Carlos M.
Título: A critical-point yield model to appraise the damage caused to soybean by white-mold / Modelo de ponto crítico para estimar os danos causados pelo mofo-branco ​​em soja
Fonte: Biosci. j. (Online);36(6):1816-1820, 01-11-2020. tab.
Idioma: en.
Resumo: A model to estimate the damage caused by white mold to soybean yield from experimental field data gathered during the summer season of 2009-10 was generated. Six soybean cultivars were grown on six sites of the Savana (Cerrados) region, resulting in a total of nine separate experiments. The gradient of disease intensity (plant stem incidence) and yield was generated through the application of different fungicides and rates three times over the course of the season. The disease incidence in plant stems was evaluated at the R1, R5.2 and R5.5 growing stages. Manual harvest at the physiological ripening stage was followed by grain drying, threshing, and cleaning. Finally, grain yield was estimated in kg/ha, and regression analysis was performed. Nine linear equations representing the damage function were generated. The mean damage function was y = - 6.7 x + 1,000, where y represents grain yield normalized to 1,000 kg/haand x represents WM incidence in plants. To appraise the damage caused by various disease intensities, these models should first be validated. Damage coefficients may be used to determine the level of economic damage.

Desenvolveu-se um modelo para estimar os danos causados pelo mofo-branco (MB) (Sclerotinia sclerotiorum) na cultura da soja, com dados gerados em experimentos de campo conduzidos na safra de soja de 2009/10. Seis cultivares de soja foram cultivados em seis locais perfazendo um total de nove experimentos em distintas regiões edafoclimáticas na região do Cerrado. O gradiente da intensidade da doença, avaliada em função de incidência de sintomas/sinais em hastes, foi gerado pela aplicação de diferentes fungicidas em momentos e doses distintas. A intensidade da doença foi avaliada, nos estádios fenológicos de R1, R5.2 e R5.5. A colheita foi realizada na maturação fisiológica e o rendimento de grãos expresso em kg/ha. As análises de regressão entre o rendimento de grãos e a incidência da doença foram realizadas para todas as combinações obtidas e geraram nove equações lineares da função de dano. Função de dano média de nove experimentos foi R = 1.000 - 6,7 I (onde R = rendimento de grãos normalizado para 1.000 kg/ha e I incidênciaa do MB em plantas). Para estimar o dano causado por intensidades diferentes da doença, esses modelos devem ser previamente validado. Os coeficientes de dano podem ser usados para determinar o limiar de dano econômico
Descritores: Ascomicetos
Soja
Responsável: BR396.1 - Biblioteca Central



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