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Registros recuperados: 32
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Aislamiento de microorganismos para control biológico de Moniliophthora roreri Acta Agron. (Palmira)
Suárez Contreras,Liliana Yanet; Rangel Riaño,Alba Luz.
Moniliophthora roreri es un hongo que causa la moniliasis, una enfermedad de la mazorca en el cultivo de cacao (Theobroma cacao), con pérdidas hasta del 60% de la cosecha. El control biológico utilizando microorganismos endófitos surge como una alternativa para el manejo de esta enfermedad. En la presente investigación se evaluaron microorganismos con potencial para control biológico de M. roreri en Norte de Santander, Colombia. Para el efecto, se aisló e identificó este fitopatógeno y se utilizaron protocolos de desinfección de los posibles microorganismos antagonistas con siembras por diluciones seriadas, selección de los géneros microbianos con mayor potencial antagónico y evaluación de las cepas por la prueba de plato dual para evaluar el efecto...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antagonistas; Antibiosis; Cacao; Control biológico; Moniliophthora roreri.
Ano: 2013 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122013000400011
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Alternation of cowpea genotypes affects the biology of Callosobruchus maculatus (fabr.) (Coleoptera: Bruchidae) Scientia Agricola
Lima,Marcileyne Pessôa Leite de; Oliveira,José Vargas de; Barros,Reginaldo; Torres,Jorge Braz.
Callosobruchus maculatus (Fabr.) is an important pest in stored cowpea, Vigna unguiculata (L.) Walp., with ample distribution in tropical and subtropical regions. The effect of alternation of cowpea genotypes, susceptible (S) and resistant (R), on the biology of (C. maculatus) was studied after four generations. A no-choice test was carried out in a completely randomized design, factorial scheme, with five treatments, four host combinations (RR, RS, SR and SS) and five replications. Each replication consisted of 30 grains of each genotype infested by two insect couples. The number of eggs per female was not different within or between combinations, evidencing that the genotypes and their alternation did not affect C. maculatus fecundity. Egg viability,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Plant resistance; Antibiosis; Stored cowpea pest.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100005
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Antagonism and modes of action of Chaetomium globosum species group, potential biocontrol agent of barley foliar diseases Boletín de la Sociedad
Moya,Paulina; Pedemonte,Debora; Amengual,Susana; Franco,Mario E. E; Sisterna,Marina N.
"Net blotch" (Drechslera teres) and "Bipolaris spot blotch" (Bipolaris sorokiniana) are foliar diseases of barley. Biological control is currently considered as an efficient alternative to chemical management of these plant diseases. The aim of the present study was to identify 2 isolates of Chaetomium (C2 and C5), endophytics on barley seedlings and to study the in vitro interactions with D. teres and B. sorokiniana, isolated from seeds of the same host. Cultural and morphological characterization of all microorganisms was done. In addition, molecular characterization of Chaetomium spp. was conducted and dual culture tests were carried out to find, by microscopic observations, the effects of the antagonist on the morphology of the pathogens. The results...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bipolaris sorokiniana; Chaetomium globosum; Drechslera teres; Antibiosis; Endophyte; Mycoparasitism.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722016000400001
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Bacterial selection for biological control of plant disease: criterion determination and validation BJM
Mota,Monalize Salete; Gomes,Cesar Bauer; Souza Júnior,Ismail Teodoro; Moura,Andréa Bittencourt.
Abstract This study aimed to evaluate the biocontrol potential of bacteria isolated from different plant species and soils. The production of compounds related to phytopathogen biocontrol and/or promotion of plant growth in bacterial isolates was evaluated by measuring the production of antimicrobial compounds (ammonia and antibiosis) and hydrolytic enzymes (amylases, lipases, proteases, and chitinases) and phosphate solubilization. Of the 1219 bacterial isolates, 92% produced one or more of the eight compounds evaluated, but only 1% of the isolates produced all the compounds. Proteolytic activity was most frequently observed among the bacterial isolates. Among the compounds which often determine the success of biocontrol, 43% produced compounds which...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rhizobacteria; Antibiosis; Mesocriconema xenoplax; Obligate parasites; Perennial plants.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000100062
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Biology of Bemisia tabaci (Genn.) B biotype (Hemiptera, Aleyrodidae) on tomato genotypes Scientia Agricola
Oriani,Maria Auxiliadora de Godoy; Vendramim,José Djair; Vasconcelos,Cristina Jensen.
Brazil is one of the main tomato (Solanum lycopersicum) producers worldwide. Nevertheless, considerable part of the production is lost due to Bemisia tabaci (Genn.) B biotype attacks. Resistant plants can be an important method for controlling this pest in an integrated pest management. Tests for evaluating some biological aspects of B. tabaci were carried out on 18 tomato genotypes, in controlled laboratory greenhouse conditions. Thirty-day-old plants placed in plastic cages were infested with 20 whitefly pairs each, for 24 h. The development of at least 30 eggs in three leaflets per plant (repetition) was observed until adult emergence. The development period of insects grown in LA1335, PI365928 and LA722 genotypes took three days longer when compared to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Whitefly; Antibiosis; Antixenosis.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000100006
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Characterization of resistance expression in genotypes of Solanum Section Lycopersicon against Tuta absoluta (Lepidoptera: Gelechiidae) Ciencia e Investigación Agraria
Vitta,Nancy; Estay,Patricia; Chorbadjian,Rodrigo A.
N. Vitta, P. Estay, and Chorbadjian, R.A. 2016. Characterization of resistance expression in genotypes of Solanum Section Lycopersicon against Tuta absoluta (Lepidoptera: Gelechiidae). Cien. Inv. Agr. 43(3):366-373. Two studies were conducted with the aim of characterizing the antixenosis and antibiosis resistance expression of genotypes in the Solanum section Lycopersicon against Tuta absoluta (Meyrick). The species used were S. lycopersicum (Fiorentino, Naomi and Belle), S. habrochaites (RCAT030597, PI126446), S. chilense (INIABB79), S. peruvianum (RCAT031296, RCAT039874 and RCAT030403) and S. pimpinellifolium (PI390739). For the antixenosis bioassay, a leaf was removed from plants of each genotype and placed in a cup with a floral foam soaked in water....
Tipo: Journal article Palavras-chave: Antibiosis; Antixenosis; Host plant resistance; Insect-plant interactions; Tomato.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000300003
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Efectividad in vitro de cepas nativas de Trichoderma spp. En aislados de Phytophthora parasítica D. Obtenidos de plantas de jamaica Colegio de Postgraduados
Esparza Luna, Linda Luz.
Se aislaron cepas nativas de Trichoderma spp. y Phytophthora parasitica en suelos cultivados con jamaica y con alta incidencia de la enfermedad “pata prieta de la jamaica”. La toma de muestras de suelo se ubicó en los municipios de Tecoanapa, Ayutla de los Libres, San Marcos y Juan R. Escudero del estado de Guerrero. Las cepas patogénicas se aislaron de tallo y raíz enfermo con síntomas evidentes de “pata prieta”. Trichoderma spp. se aisló directamente de suelo mediante el método de dilución de esporas en cajas Petri con el medio de cultivo Papa dextrosa agar. Se obtuvieron tres cepas de P. parasitica y 15 cepas de Trichoderma, correspondiendo a las siguientes especies, 8 a T. asperellum, 3 a T. harzianum, 1 a T. virens, 1 a T. inhamatum, 1 a...
Tipo: Tesis Palavras-chave: Antagonismo; Antibiosis; Trichoderma spp; Phytophthora parasitica; Jamaica antangonism; Antibiotic; Trichoderma spp.; P. parasitica; Jamaica.
Ano: 2012 URL: http://hdl.handle.net/10521/1029
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Efectividad in vitro de cepas nativas de Trichoderma spp. En aislados de Phytophthora parasítica D. Obtenidos de plantas de jamaica Colegio de Postgraduados
Esparza Luna, Linda Luz.
Se aislaron cepas nativas de Trichoderma spp. y Phytophthora parasitica en suelos cultivados con jamaica y con alta incidencia de la enfermedad “pata prieta de la jamaica”. La toma de muestras de suelo se ubicó en los municipios de Tecoanapa, Ayutla de los Libres, San Marcos y Juan R. Escudero del estado de Guerrero. Las cepas patogénicas se aislaron de tallo y raíz enfermo con síntomas evidentes de “pata prieta”. Trichoderma spp. se aisló directamente de suelo mediante el método de dilución de esporas en cajas Petri con el medio de cultivo Papa dextrosa agar. Se obtuvieron tres cepas de P. parasitica y 15 cepas de Trichoderma, correspondiendo a las siguientes especies, 8 a T. asperellum, 3 a T. harzianum, 1 a T. virens, 1 a T. inhamatum, 1 a...
Tipo: Tesis Palavras-chave: Antagonismo; Antibiosis; Trichoderma spp; Phytophthora parasitica; Jamaica; Maestría; Fitopatología; Antangonism; Antibiotic; Jamaica.
Ano: 2009 URL: http://hdl.handle.net/10521/1357
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Endophytic fungi from Myrcia guianensis at the Brazilian Amazon: distribution and bioactivity BJM
Banhos,Elissandro Fonseca dos; Souza,Antonia Queiroz Lima de; Andrade,Juliano Camurça de; Souza,Afonso Duarte Leão de; Koolen,Hector Henrique Ferreira; Albuquerque,Patrícia Melchionna.
Beneficial interactions between plants and microorganisms have been investigated under different ecological, physiological, biochemical, and genetic aspects. However, the systematic exploration of biomolecules with potential for biotechnological products from this interaction still is relatively scarce. Therefore, this study aimed the evaluation of the diversity and antimicrobial activity of the endophytic fungi obtained from roots, stems and leafs of Myrcia guianensis (Myrtaceae) from the Brazilian Amazon. 156 endophytic fungi were isolated and above 80% were identified by morphological examination as belonging to the genera Pestalotiopsis, Phomopsis, Aspergillus, Xylaria, Nectria, Penicillium and Fusarium. Fermented broth of those fungi were assayed for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Secondary metabolites; Fungus/plant interaction; Antibiosis; Amazonian endophytic fungi.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100021
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Evaluación de la resistencia a Schizaphis graminum (Hemiptera: Aphididae) en cebada Rev. Soc. Entomol. Argent.
Tocho,Erica F.; Marino de Remes Lenicov,Ana M.; Castro,Ana M..
El pulgón verde de los cereales, Schizaphis graminum (Rondani), es una de las principales plagas de estos cultivos en el mundo y también presente en Argentina. Si bien el control químico es la práctica más utilizada, el uso de variedades resistentes (uno de los componentes principales del MIP) es la estrategia más efectiva y ambientalmente más amigable para el control de plagas. Dado que las plantas presentan distintos mecanismos que les permiten defenderse de los insectos, el objetivo de este trabajo fue caracterizar la resistencia a Schizaphis graminum en una población de líneas recombinantes de cebada, e identificar aquellas con mejores características, portadoras de genes de resistencia a este insecto. La antixenosis fue analizada por la prueba de...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Schizaphis graminum; Áfidos; Antixenosis; Antibiosis; Tolerancia.
Ano: 2012 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802012000100001
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Evaluation of forage grass resistance to Mahanarva fimbriolata (Stål) Bragantia
Grisoto,Eliane; Vendramim,José Djair; Lourenção,André Luiz; Usberti,José Alfredo; Olinda,Ricardo Alves de.
ABSTRACT The aim of this study was to select forage grasses with potential resistance to Mahanarva fimbriolata by assessing effects on insect. No-choice assays were conducted with 12 genotypes and laboratory-reared insects. The following parameters were assessed: mortality and duration of the nymphal stage; adult weight and longevity; pre-oviposition period; number of eggs/female; viability and duration of the embryonic period. As main result it was verified that the mortality of nymphs reared on Panicum maximum cv. Paredão is almost complete and that this forage grass may be characterized as resistant to this insect by antibiosis. Further, the grasses can be divided into three groups following a cluster analysis: P. maximum cv. Aries, Setaria sphacelata...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Spittlebug; Antibiosis; Brachiaria; Host plant resistance.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100107
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Evaluation of Resistance of Cucumber Cultivars to the Vegetable Leafminer (Liriomyza sativae Blanchard) (Diptera: Agromyzidae) in Greenhouse Chilean J. Agric. Res.
Basij,Moslem; Askarianzaeh,Alireza; Asgari,Shahriyar; Moharramipou,Saeid; Rafezi,Ramin.
The leafminer, Liriomyza sativae Blanchard, is distributed around the world and is an important pest of vegetables and ornamentals. Given the resistance potential of the leafminer to current insecticides, the use of resistant plant cultivars and parasitoids could be effective integrated pest management (IPM) strategies against it. Cucumber (Cucumis sativus L.) is a preferred host for this insect. Seventeen cultivars of cucumber have been evaluated to study resistance mechanisms to L. sativae. All cucumber cultivars were evaluated in screening tests in greenhouse with indices such as the number of leafminer stings, the number of larval mines, the proportion of larval mines to leafminer stings, and the rate of injury. Significant differences (p < 0.01)...
Tipo: Journal article Palavras-chave: Cucumber cultivar; Screening; Antibiosis; Screening.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300008
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Evaluation of the Antidiabetic and Antibacterial Activity of Cissus sicyoides BABT
Beltrame,Flavio Luis; Pessini,Greisiele Lorena; Doro,Dani Luce; Dias Filho,Benedito Prado; Bazotte,Roberto Barbosa; Cortez,Diógenes Aparício Garcia.
In this work we investigated the antidiabetic and antibacterial effect of Cissus sicyoides (CS) from Brazil. Diabetic rats that received water (A group) or extracts from the aerial parts of the plant (Cs group) during four weeks were employed. After this period, serum levels of glucose, cholesterol and triglycerides were measured. Glycemia was not affected by treatment with CS. However, there was an increased cholesterol and triglyceride level in Cs group. In addition, bioassay-guided fractionation of methanolic extract from aerial parts of CS was performed for isolation of antibacterial compounds.beta-Sitosterol and sitosterol-beta-D-glucopyranoside isolated showed antibacterial activity against Bacillus subtilis with minimal inhibitory concentrations...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cissus sicyoides; Vitaceae; Experimental diabetes mellitus; Antibiosis; Steroids.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000100004
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Expression of antixenosis and antibiosis components of resistance to spotted stem borer Chilo partellus in sorghum under greenhouse conditions Open Agri
Kumar, V.K.,( V. Kishore Kumar ).
Palavras-chave: Genotypes; Antibiosis; Sorghum; Defence mechanisms; Embryonic development; Animal developmental stages; Eggs; Sexual reproduction; Biological interaction; Planting.
Ano: 2007 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3304
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Host Selection Behavior of Helicoverpa armigera Open Agri
Palavras-chave: Pigeonpeas; Chickpeas; Allelochemicals; Genotypes; Integrated pest management; Animal developmental stages; Antibiosis; Semiochemicals; Grain legumes; Organic acids.
Ano: 1990 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4081
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Identificación morfológica y molecular de Prosapia simulans (Walker) (Hemiptera: Cercopidae), y selección y mecanismos de resistencia a este salivazo en híbridos de Brachiaria Neotropical Entomology
Castro,Ulises; Cardona,Cesar; Vera-Graziano,Jorge; Miles,John; Garza-Garcia,Ramón.
Prosapia simulans (Walker) es una especie de salivazo que ataca los pastos del género Brachiaria (Trin.) Griseb. desde México hasta Colombia y ocasiona pérdidas económicas a la industria ganadera. El desarrollo de cultivares resistentes es considerado el mejor método de control del salivazo. Este trabajo tuvo los siguientes objetivos: corroborar la identificación de P. simulans originarias de México y Colombia, probar nuevos híbridos de Brachiaria por resistencia a esta especie y caracterizar los mecanismos de resistencia presentes en ellos. Mediante la combinación de caracteres morfológicos (uso de claves taxonómicas, disección de la genitalia del macho) y técnicas moleculares (RAPD-PCR) se logró corroborar que P. simulans es plaga de Brachiaria spp....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mosca pinta; Mejoramiento; Antibiosis; Tolerancia; Gramínea forrajera.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000400012
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Is curtobacterium wilt biocontrol temperature dependent? Agronomy
Martins, Samuel Julio; Medeiros, Flavio Henrique Vasconcelos; Souza, Ricardo Magela; Vilela, Laize Aparecida Ferreira.
Abiotic stress interferes with plant-microbial interactions, but some microorganisms may buffer this interference. We investigated the interaction between temperature and bacterial wilt (Curtobacterium flaccumfaciens pv. flaccumfaciens - Cff) biocontrol and the ability of Bacillus subtilis strain ALB629 to colonize bean seedlings, to inhibit pathogen growth and to use different C and N sources. B. subtilis ALB629rif, a mutant selected from the wild population of ALB629, was used to monitor plant colonization at 20°C and 30°C. ALB629rif was detected only in the plant roots (103.22 CFU g-1) at the lower temperature but colonized the roots, stems, and leaves (105.85, 104.48, and 104.01 CFU g-1), respectively, at 30ºC. The area under the disease progress curve...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.01.02.01-0 seed treatment; Phaseolus vulgaris; Antibiosis; Temperature; Rhizobacteria; PGPR Fitopatologia.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18018
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Nymphal development, lipid content, growth and weight gain of Nezara viridula (L.) (Heteroptera: Pentatomidae) fed on soybean genotypes Neotropical Entomology
Piubelli,Giorla C.; Hoffmann-Campo,Clara B.; Arruda,Iara C. de; Lara,Fernando M..
The effects of five soybean [Glycine max (L.) Merrill] genotypes ('BR-16', 'IAC-100', PI 227687, PI 229358, PI 274454) on nymphal development, adult weight and lipid content of the stink bug Nezara viridula (L.), were evaluated in the laboratory. When fed on the pods of PI 227687 (resistant) and of 'BR-16' (susceptible) nymph mortalities were respectively 66.2% and 27.5%. Second instar nymphs, maintained since hatching in petri dishes containing PI 274454 and 'BR-16' pods, weighed 1.1 mg and 1.0 mg, respectively; they were heavier than those fed with PI 227687 (0.7 mg) and 'IAC-100' (0.7 mg) pods. Adult fresh weights were 146.9 mg when fed on 'BR-16', 127.0 mg with PI 227687 and 125.5 mg with 'IAC-100'. The later two genotypes also negatively affected...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plant resistance; Antibiosis; Glycine max.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000100019
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Plant Resistance to Insects in Sorghum Open Agri
H.C..
Palavras-chave: Crops; Sorghum; Biological interaction; Animal developmental stages; Genotypes; Genes; Grain; Antibiosis; Eggs.
Ano: 1997 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4662
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Popcorn genotypes resistance to fall armyworm Ciência Rural
Oliveira,Nádia Cristina de; Suzukawa,Andréia Kazumi; Pereira,Carolina Bertuzzi; Santos,Hayssa Vilela; Hanel,Aldo; Albuquerque,Fernando Alves de; Scapim,Carlos Alberto.
ABSTRACT: The aim of this study was to evaluate popcorn genotypes for resistance to the fall armyworm, Spodoptera frugiperda. The experiment used a completely randomized design with 30 replicates. The popcorn genotypes Aelton, Arzm 05 083, Beija-Flor, Colombiana, Composto Chico, Composto Gaúcha, Márcia, Mateus, Ufvm Barão Viçosa, Vanin, and Viviane were evaluated,along with the common maize variety Zapalote Chico. Newly hatched fall armyworm larvae were individually assessed with regard to biological development and consumption of food. The data were subjected to multivariate analyses of variance and genetic divergence among genotypes was evaluated through the clustering methods of Tocher based on generalized Mahalanobis distances and canonical variable...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antibiosis; Nutrition index; Plant breeding; Spodoptera frugiperda.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000200154
Registros recuperados: 32
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