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Phytophthora palmivora causando podrid?o de frutos de mamoeiro no Pará
TRINDADE, DINALDO R.;POLTRONIERI, LUIZ S.;
Fitopatologia Brasileira , 2002, DOI: 10.1590/S0100-41582002000400019
Abstract: phytophthora palmivora was isolated from papaya (carica papaya) fruit rots, from commercial growth in capanema county, pará. the fungus was pathogenic to healthy inoculated fruits and reisolated, fullfiling the koch postulates. this is the first report of this pathogen on papaya in pará, brazil.
Phytophthora palmivora causando podrid o de frutos de mamoeiro no Pará  [cached]
TRINDADE DINALDO R.,POLTRONIERI LUIZ S.
Fitopatologia Brasileira , 2002,
Abstract: Phytophthora palmivora was isolated from papaya (Carica papaya) fruit rots, from commercial growth in Capanema County, Pará. The fungus was pathogenic to healthy inoculated fruits and reisolated, fullfiling the Koch postulates. This is the first report of this pathogen on papaya in Pará, Brazil.
Patogenicidade de Isolados de Fusarium spp. e Phytophthora palmivora Associados com a Podrid o do Estipe da Pupunheira no Paraná Fusarium spp. and Phytophthora palmivora isolates associated with basal stem rotting of peach palm
Sandro Alex Rosa Alves,álvaro Figueredo dos Santos,Dauri José Tessmann,Jo?o Batista Vida
Pesquisa Florestal Brasileira , 2011, DOI: 10.4336/2012.pfb.52.133
Abstract: Este trabalho teve como objetivo avaliar a patogenicidade de isolados de Fusarium spp. e Phytophthora palmivora associados com a podrid o do estipe da pupunheira. Quatro isolados de P. palmivora e 15 de Fusarium spp. foram inoculados em caules com ferimentos, usando-se um disco de micélio-ágar como inóculo. A avalia o consistiu naobserva o dos sintomas de amarelecimento e morte da folha bandeira e folhas externas. Os resultados mostraram que P. palmivora causou danos mais severos do que Fusarium spp, e que ocorrem diferen as na agressividade dos isolados desses patógenos. The objective of this research was to evaluate the pathogenicity of P. palmivora and Fusarium spp. isolates associated with basal stem rotting of peach palm. Four P. palmivora isolates and 15 Fusarium spp. isolates were inoculated in wounded stems using mycelial plugs as inoculum. Disease intensity was based on symptoms showed by leaf flags and full- xpanded leaves, which ranged from yellowing to necrosis. It was verified that P. palmivora caused more damage than the Fusarium spp., and that the isolates of these fungi presented variation on aggressiveness.
Efeito inibitório de extratos vegetais sobre Colletotrichum gloeosporioides - agente causal da podrid o de frutos de mamoeiro  [cached]
Ribeiro Luiz Fernando,Bedendo Ivan Paulo
Scientia Agricola , 1999,
Abstract: Extratos aquosos foram obtidos a partir de bulbilhos de alho, folhas de hortel e mamona e frutos de pimenta. Após a incorpora o destes extratos em BDA, obtendo-se concentra es de 100, 200, 500, 1000, 5000 e 10000 ppm, foi avaliado o crescimento e a produ o de conídios de um isolado de Colletotrichum gloeosporioides, agente de podrid o em frutos de mamoeiro. Os resultados demonstraram o efeito inibitório dos diferentes extratos a partir da concentra o de 200 ppm. O extrato de alho inibiu o crescimento micelial, em porcentagens variáveis de 5,3 a 67,6%, porém n o atuou de modo expressivo sobre a produ o de conídios. Em contraposi o, os extratos de hortel , mamona e pimenta promoveram inibi o menos acentuada do crescimento de micélio, porém reduziram drasticamente a produ o de conídios em níveis variáveis de 41 a 84%, de acordo com as concentra es crescentes dos mesmos. As propriedades fungitóxicas detectadas nos extratos utilizados no ensaio evidenciaram o uso potencial dos mesmos como alternativa aos métodos físicos e químicos convencionalmente usados para o controle da doen a.
Primeiro relato da podrid?o da estipe da pupunheira, causada por Phytophthora palmivora, no estado do Paraná
Santos, álvaro F. dos;Luz, Edna Dora. M. N.;Finato, Priscila D.;Tessmann, Dauri J.;Vida, Jo?o B.;
Fitopatologia Brasileira , 2004, DOI: 10.1590/S0100-41582004000600016
Abstract: phytophthora palmivora was isolated from infected peach palm (bactris gasipaes) plants with stem rot symptoms in paraná state, in 2002. pathogenicity tests and subsequent reisolations of p. palmivora confirmed the hypothesis that this fungus was the causal agent of the disease. this is the first report of p. palmivora causing stem rot on peach palm (bactris gasipaes) in the southern state of paraná.
Rea o de cultivares de soja à podrid o vermelha da raiz causada por Fusarium solani f. sp. glycines  [cached]
Gásperi Audir C.,Prestes Ariano M.,Costamilan Leila M.
Fitopatologia Brasileira , 2003,
Abstract: A podrid o vermelha da raiz, causada por Fusarium solani f. sp. glycines, é considerada uma das doen as mais severas de soja (Glycine max) no Sul do Brasil. Este trabalho avaliou a rea o de 30 genótipos de soja em experimentos conduzidos em camara de crescimento, na Embrapa Trigo, Passo Fundo, RS. Inoculou-se o fungo nos genótipos pelo método "palito-de-dente", através da introdu o de uma ponta de palito colonizada pelo fungo no hipocótilo de cada plantula e pelo método "gr o de sorgo", em que o inóculo, constituído de gr os de sorgo (Sorghum bicolor) colonizados, foi colocado ao redor do colo da planta. Avaliaram-se os sintomas na parte aérea e no sistema radicular. Para ambos métodos de inocula o, houve diferen as entre genótipos e a amplitude de rea o variou de resistência moderada à alta suscetibilidade. Os genótipos BRS 66, BRS 137 e BRS 138, pelo método "palito-de-dente", e IAS 5 e BRS 137, pelo método "gr o de sorgo", foram considerados moderadamente resistentes. Os genótipos Embrapa 59, CEP 12-Cambará, Ipagro 21, FT-Guaíra, FT-Abyara, BR-4 e FT-2003 foram moderadamente suscetíveis (MS) pelo método "palito-de-dente", enquanto Ivorá, RS 7-Jacuí, Fepagro RS-10, BR-16, CD 203, BR-4, CEP 20-Guajuvira, BRS 154, BRS 138 e Cobb foram MS pelo método "gr o de sorgo". Por outro lado, Bragg, CD 205, RS 5-Esmeralda, RS 9- Itaúba, IAS 4, Ocepar 14, CD 201, FT 2011, FT-Saray, BRS 153 e FT-2004 foram suscetíveis em ambos os métodos usados.
Caracteriza o de genótipos de soja na regi o dos Cerrados quanto à rea o à podrid o vermelha da raiz, causada pelos fungos Fusarium tucumaniae e Fusarium brasiliense Reaction of soybean cultivars to the sudden death syndrome pathogens Fusarium tucumaniae and F. brasiliense  [cached]
Austeclinio Lopes de Farias Neto,Alexei de Campos Dianese,Mateus Rollemberg Santin,Bárbara Cristina do Couto
Revista Ceres , 2013,
Abstract: A podrid o vermelha da raiz de soja vem crescendo em importancia, a cada ano, no Brasil, com aumento substancial de participa o nas perdas de produtividade. Na regi o dos Cerrados, s o escassos os dados de campo sobre a rea o de cultivares à doen a. Assim, este trabalho teve como objetivo a caracteriza o, em campo, de uma série de genótipos de soja, quanto à resistência à podrid o vermelha da raiz, em solos naturalmente infestados. Foram testados 71 genótipos de soja, sendo 16 do ciclo de matura o precoce, 28 do ciclo de matura o médio e 27 do ciclo de matura o tardio, em quatro localidades, no entorno do Distrito Federal. O delineamento experimental foi o de blocos ao acaso, com quatro repeti es. A caracteriza o foi realizada por meio dos níveis de incidência e severidade dos sintomas foliares. Genótipos com altos níveis de resistência à doen a foram observados nos três grupos de matura o, em cultivares e linhagens em fase final de melhoramento. Loss due to soybean sudden death syndrome (SDS) has increased considerably in Brazil in recent years. Field data on reaction of soybean genotypes to SDS infection in the Cerrados is almost nonexistent. Therefore, the objective of this work was to characterize the reaction of soybean genotypes, adapted to the Cerrados, to SDS infection on field trials in areas with natural inoculum. Seventy one soybean genotypes were used in the experiments, sixteen early season, twenty eight midseason and twenty seven late season genotypes, in field trials located in four different rural properties around Brazil's Federal District. The experimental design used was the randomized complete block, with four repetitions. The characterization was performed using the levels of disease incidence and severity of foliar symptoms Genotypes with good levels of disease resistance were observed in all three maturity groups, cultivars and lines in the final stages of development.
Rea??o de genótipos de mamoeiro à varíola e à podrid?o-do-pé
Dianese, Alexei C.;Blum, Luiz E.B.;Dutra, Jaqueline B.;Lopes, Leonardo F.;Sena, Mariana C.;Freitas, Leandro F.;Yamanishi, Osvaldo K.;
Fitopatologia Brasileira , 2007, DOI: 10.1590/S0100-41582007000500008
Abstract: papaya (caryca papaya) genotypes ('nt red', 'golden', 'baixinho de st. amália', 'sunrise solo', 'cross paris', 'tailandia verde', 'tailandia roxo', 'tailandia rox?o', 'sekati' and 'tainung-1') were evaluated for resistance to black-spot (asperisporium caricae) and foot-rot (phytophthora palmivora). the study was conducted in an area where both pathogens occurred naturally and in a greenhouse using soil naturally infested with p. palmivora. black-spot severity was evaluated using a scale, from 1 (0-3% of the surface covered by lesions) to 6 (> of 50% of the surface covered by lesions). the evaluations were made between march / 2003 and april / 2003 and between october / 2003 and february / 2004. foot-rot was evaluated, on the field trial, by counting the total number of plants with yellowing or wilt symptoms in the same period. on the greenhouse trials p. palmivora severity was evaluated in each plant using a scale from 0 (no wilt symptoms) to 3 (plant death). in relation to black-spot, the genotype 'sekati' of the formosa group presented the lowest average value of severity (2,0) on the foliage while ''golden' (3,1) and nt red' (3,7) had the largest. 'tailandia rox?o' (1,6), 'tailandia verde' (1,7) and 'sekati' (1,7) also had the lowest averages of severity on the fruit, while, 'tailandia roxo' (2,3), 'cross paris' (2,5), and 'sunrise solo' (3,1) presented the largest. in relation to foot rot, 'tailandia rox?o' (formosa group) presented low amount of disease and 'golden', 'sunrise solo, and 'nt red' presented higher values.
Avalia??o de métodos, concentra??es de inóculo e idade das plantulas para inocula??o de Phytophthora palmivora em mamoeiro
Santos, Tacila Ribeiro;Luz, Edna Dora M.N.;
Tropical Plant Pathology , 2011, DOI: 10.1590/S1982-56762011000600007
Abstract: a set of three experiments were conducted in a completely randomized design with 10 replications/treatment aimed at evaluating inoculation methods, inoculum concentrations and seedling age to establish an effective methodology for evaluating papaya accesses for resistance to p. palmivora. in experiment 1, 60 days-old seedlings of three genotypes (golden, kapoho solo and calimosa) were inoculated using three methods - deposition of 1 ml of zoospore suspension around seedlings planted on wet (dsw) and dry substrate (dds), and immersion of the seedling root system in 200 ml of the inoculum suspension for 20 minutes (irs) - and five inoculum concentrations 5x103, 104, 5x104, 105 and 5x105 zoospores/ml; in experiment two, two genotypes (golden and kapoho solo), two inoculation methods (dse and dss) and three inoculum concentrations (104, 5x104 and 105) were tested. experiment three was aimed at selecting an adequate seedling age. three papaya genotypes at ages of 45, 60, 75 and 90 days were inoculated through the dss method using the inoculum concentration of 5x104 zoospores/ml and 25 seedlings/treatment. in all experiments the mean number of days of seedling survival after inoculation (days) was utilized for treatment comparisons using tukey's statistical test (p>0,05). results of the experiments have indicated that the dds method of inoculation, the use of 60 day-old seedlings and application of a suspension of 105 or 5x104 zoospores/ml are adequate for accessing papaya seedling resistance against p. palmivora.
Controle de Colletotrichum gloeosporioides em mamoeiro, utilizando extratos vegetais, indutores de resistência e fungicida = Alternative control of Colletotrichum gloeosporioides in papaya, using vegetable extracts, resistance inducers and fungicide
Luciana Cordeiro do Nascimento,Aparecida Rodrigues Nery,Luís Nery Rodrigues
Acta Scientiarum : Agronomy , 2008,
Abstract: O presente trabalho teve como objetivo avaliar o controle de doen as do mamoeiro, utilizando extratos vegetais (alho, angico e manjeric o), óleos naturais (urucum e algod o), indutores de resistência (Bion , Ecolife e Agro-mos ) e fungicida Mancozeb/Dithane. O Experimento I consistiu-se da avalia o dos tratamentos sobre o crescimento micelial de Colletotrichum gloeosporioides, in vitro; no Experimento II, efetuou-se ainocula o artificial do fungo sobre frutos sadios de mam o e avaliou-se a severidade da podrid o peduncular, por meio de escala de notas e, no Experimento III, aplicaram-se os tratamentos em mudas de mamoeiro, inoculadas artificialmente com C. gloeosporioides,avaliando-se a antracnose com escala de notas. Os resultados obtidos demonstraram que extratos de angico e alho proporcionaram um menor crescimento micelial, in vitro, e o Bion manteve um eficiente controle da podrid o peduncular em frutos. Nas mudas, oefeito do alho, angico e Bion diferiram significativamente dos demais, sendo que o Bion apresentou melhor controle da severidade da antracnose. Assim, o controle da podrid o peduncular e antracnose em mamoeiro, com produtos naturais e indutores de resistência, pode ser uma op o viável na substitui o de agroquímicos. This present work had as objective to evaluate the control of papaya diseases using natural extracts (Allium sativum L., Anadenanthera peregrina L. Speng, and Ocimum basilicum L.), natural oils (Gossypium hirsutum L. and Bixa orellana L.), resistance inducers (Bion , Ecolife and Agro-mos ), and a chemical fungicide (Mancozeb/Dithane). Experiment I was conducted to evaluate the inhibitory potential of the treatments on Colletotrichum gloeosporioides mycelial growth in vitro; in Experiment II, artificial inoculation of fungus was performed on healthy papaya fruits, and the severity of stem-end rot was evaluated using a disease index; and in Experiment III,treatments were applied on papaya seedlings artificially inoculated with C. gloeosporioides, and anthracnose was evaluated by means of a disease index. Obtained results showed that extracts of Anadenanthera and Allium were responsible for lower mycelial growth in vitro, andBion was efficient for papaya stem-end rot. In papaya seedlings, the effects of garlic, angico and Bion differed significantly from the rest, with Bion showing the best results for anthracnose control. Papaya seeds were not affected by C. gloeosporioides. Thus, alternative control to stem-end rot and anthracnose on papaya with natural products and resistance inducers should be an option viable fo
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