Consulta: subjectFacets:"Soilborne pathogen"
Registros recuperados: 8
Data/hora: 03/06/2024 01:25:16

Fusarium wilt incidence and common bean yield according to the preceding crop and the soil tillage system
Provedor de dados: 86
Autores: Toledo‑Souza,Eliane Divina de; Silveira,Pedro Marques da; Café‑Filho,Adalberto Corrêa; Lobo Junior,Murillo.
The objective of this work was to evaluate the effects of preceding crops and tillage systems on the incidence of Fusarium wilt (Fusarium oxysporum f. sp. phaseoli) and common bean (Phaseolus vulgaris) yield. The cultivar BRS Valente was cultivated under center‑pivot irrigation in the winter seasons of 2003, 2004 and 2005, after several preceding crops established in the summer seasons. Preceding crops included the legumes Cajanus cajan (pigeon pea), Stylosanthes guianensis, and Crotalaria spectabilis; the grasses Pennisetum glaucum (millet), Sorghum bicolor (forage sorghum), Panicum maximum, and Urochloa brizantha; and a consortium of maize (Zea mays) and U. brizantha (Santa Fé system). Experiments followed a strip‑plot design, with four replicates....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusarium oxysporum; Phaseolus vulgaris; Crop‑livestock integration; Crop rotation; No‑tillage; Soilborne pathogen.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000800002

Biological control of white mold by Trichoderma harzianum in common bean under field conditions
Provedor de dados: 86
Autores: Carvalho,Daniel Diego Costa; Geraldine,Alaerson Maia; Lobo Junior,Murillo; Mello,Sueli Corrêa Marques de.
Abstract: The objective of this work was to evaluate Trichoderma harzianum isolates for biological control of white mold in common bean (Phaseolus vulgaris). Five isolates were evaluated for biocontrol of white mold in 'Perola' common bean under field conditions, in the 2009 and 2010 crop seasons. A commercial isolate (1306) and a control treatment were included. Foliar applications at 2x109 conidia mL-1 were performed at 42 and 52 days after sowing (DAS), in 2009, and at 52 DAS in 2010. The CEN287, CEN316, and 1306 isolates decreased the number of Sclerotinia sclerotiorum apothecia per square meter in comparison to the control, in both crop seasons. CEN287, CEN316, and 1306 decreased white mold severity during the experimental period, when compared to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Sclerotinia sclerotiorum; Antagonists; Hyperparasitism; Soilborne pathogen.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015001201220

Fusarium oxysporum strains as biocontrol agents against Fusarium wilt: effects on soil microbial biomass and activity
Provedor de dados: 86
Autores: Ghini,Raquel; Mezzalama,Monica; Ambrosoli,Roberto; Barberis,Elisabetta; Garibaldi,Angelo; Piedade,Sônia Maria de Stefano.
Before planning the large-scale use of nonpathogenic strains of Fusarium oxysporum as biocontrol agents of Fusarium wilt, their behaviour and potential impact on soil ecosystems should be carefully studied as part of risk assessment. The aim of this work was to evaluate the effects of antagonistic F. oxysporum strains, genetically manipulated (T26/6) or not (233/1), on soil microbial biomass and activity. The effects were evaluated, in North-western Italy, in two soils from different sites at Albenga, one natural and the other previously solarized, and in a third soil obtained from a 10-year-old poplar stand (Popolus sp.), near Carignano. There were no detectable effects on ATP, fluorescein diacetate hydrolysis, and biomass P that could be attributed to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological control; Soilborne pathogen; Risk assessment.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000100012

Temperature and dosage dependent suppression of damping-off caused by Rhizoctonia solani in vermicompost amended nurseries of white pumpkin: (with 3 tables &amp;#38; 2 figures)
Provedor de dados: 85
Autores: Rivera,MC; Wright,Eduardo R; López,MV; Fabrizio,MC.
It is generally accepted that composts have the potential to provide biological control of plant diseases. However, there has been little research on the use of vermicomposts for the same purpose. The aim of this paper was to evaluate a vermicompost suppressiveness in nurseries of white pumpkin infested with Rhizoctoniasolani. Two assays were carried out at 22 ± 2 °Cand 15 ± 3 °C, with increasing proportions of compost in the substratum. Seedlings with damping-off or incipient crown rot, as well as those that did not emerge as expected for the germination power, were considered diseased. Vermicompost's effectiveness in suppressing the disease depended on dosage and temperature.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Benincasa hispida; Cucurbitaceae; Disease control; Soilborne pathogen.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100016

Biotic and abiotic factors associated with soil suppressiveness to Rhizoctonia solani
Provedor de dados: 63
Autores: Ghini,Raquel; Morandi,Marcelo Augusto Boechat.
Crop management may modify soil characteristics, and as a consequence, alter incidence of diseases caused by soilborne pathogens. This study evaluated the suppressiveness to R. solani in 59 soil samples from a microbasin. Soil sampling areas included undisturbed forest, pasture and fallow ground areas, annual crops, perennial crops, and ploughed soil. The soil samples were characterized according to abiotic variables (pH; electrical conductivity; organic matter content; N total; P; K; Ca; Mg; Al; H; S; Na; Fe; Mn; Cu; Zn; B; cation exchange capacity; sum of bases and base saturation) and biotic variables (total microbial activity evaluated by the CO2 evolution and fluorescein diacetate hydrolysis; culturable bacterial, fungal, actinomycetes, protozoa,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soilborne pathogen; Soil microorganisms; Biological control; Path analysis; Suppressive soil.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000200007

Is it necessary to soak rice grains to prepare Rhizoctonia solani AG-4 inoculum?
Provedor de dados: 102
Autores: Paula Júnior,Trazilbo J.; Vieira,Rogério F.; Jesus Junior,Waldir C.; Hau,Bernhard; Teixeira,Hudson.
A study was conducted to evaluate the effects on the development of root rot on common bean, cv. 'Dufrix' after treatment with four volumes of water (0, 30%, 60%, and 90%, v/w) added to rice grains previously immersed in water for 24 hours before autoclaving and colonization of grains by Rhizoctoniasolani AG-4. Colonized rice grains and non-infested rice grains were mixed in pots with sterilized soil and sand (2:1), where beans were sown. Based on results of area under plant emergence curve, plant height, plant dry weight, and disease severity, we conclude that inoculum is more effective in causing disease when no water is added to the rice grains before autoclaving.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Phaseolus vulgaris; Soilborne pathogen; Methodology; Root rot.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582007000600008

Population structure of Monosporascus cannonballus isolated from melons produced in Northeastern Brazil based on mycelial compatibility groups - doi: 10.4025/actasciagron.v35i2.15182
Provedor de dados: 1
Autores: Bezerra, Cíntia Souza; Universidade Federal Rural de Pernambuco; Correia, Kamila Câmara; Universidade Federal Rural de Pernambuco; Câmara, Marcos Paz Saraiva; Universidade Federal Rural de Pernambuco; Sales Junior, Rui; Universidade Federal Rural do Semi-Árido; Armengol, Josep; Instituto Agroforestal Mediterráneo; Michereff, Sami Jorge; Universidade Federal Rural de Pernambuco.
The population structure of Monosporascus cannonballus, which causes vine decline in melons, was assessed based on the determination of mycelial compatibility groups (MCGs) in a collection of 58 isolates obtained from seven melon fields in three municipalities of Northeastern  Brazil. For comparison, an additional 11 isolates of M. cannonballus from Spain were included in the analysis. MCGs were determined through comparisons of paired isolates growing on PDA culture media in the dark at 30ºC in various combinations. The Brazilian isolates were assigned into four MCGs: MCG-1 (n = 35 isolates), MCG-2 (n = 20), MCG-3 (n = 2), and MGC-4 (n = 1). MCG-1 and MCG-2 included isolates from all surveyed areas. The Spanish isolates were assigned into six different...
Tipo: Pesquisa científica
Palavras-chave: 5.01.02.01-0 Cucumis melo; Melon; Vine decline; Soilborne pathogen; Genetic diversity Fitopatologia Cucumis melo; Melon; Vine decline; Soilborne pathogen; Genetic diversity.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/15182

Impact of water potential on growth and germination of Fusarium solani soilborne pathogen of peanut
Provedor de dados: 58
Autores: Palacios,Sofia; Casasnovas,Francisco; Ramirez,María L.; Reynoso,María. M.; Torres,Adriana M.
Studies were conducted to determine the effect of osmotic and matric stress on germination and growth of two Fusarium solani strains, the etiological agent responsible of peanut brown root rot. Both strains had similar osmotic and matric potential ranges that allowed growth, being the latter one narrower. F. solani showed the ability to grow down to -14 MPa at 25 °C in non-ionic modified osmotic medium, while under matric stress this was limited to -8.4 MPa at 25 °C. However, both strains were seen to respond differently to decreasing osmotic and matric potentials, during early stages of germination. One strain (RC 338) showed to be more sensitive to matric than osmotic (non ionic) and the other one (RC 386) showed to be more sensitive to osmotic than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusarium solani; Germination; Growth; Matric potential; Osmotic potential; Peanut brown root rot; Soilborne pathogen.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300046