Academic literature on the topic 'Sigatoka'
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Journal articles on the topic "Sigatoka"
Ploetz, Randy. "Black Sigatoka." Pesticide Outlook 11, no. 1 (2000): 19–23. http://dx.doi.org/10.1039/b006308h.
Full textIrish, B. M., R. Goenaga, and R. C. Ploetz. "Mycosphaerella fijiensis, Causal Agent of Black Sigatoka of Musa spp. Found in Puerto Rico and Identified by Polymerase Chain Reaction." Plant Disease 90, no. 5 (May 2006): 684. http://dx.doi.org/10.1094/pd-90-0684a.
Full textReuveni, Moshe, Marcel Barbier, and Agnelo J. Viti. "Essential Tea Tree Oil As a Tool to Combat Black Sigatoka in Banana." Outlooks on Pest Management 31, no. 4 (August 1, 2020): 180–86. http://dx.doi.org/10.1564/v31_aug_08.
Full textAlamo, Carmen, Edward Evans, Alba Brugueras, and Sikavas Nalampang. "Economic Impact and Trade Implications of the Introduction of Black Sigatoka (Mycosphaerella fijiensis) into Puerto Rico." Journal of Agricultural and Applied Economics 39, s1 (October 2007): 5–17. http://dx.doi.org/10.1017/s107407080002890x.
Full textCavalcante, Maria de Jesus B., Claudenor P. de Sá, Francisco C. da Rocha Gomes, Tarcísio M. de Souza Gondim, Zilton J. M. Cordeiro, and Jorge L. Hessel. "Distribuição e impacto da sigatoka-negra na bananicultura do estado do Acre." Fitopatologia Brasileira 29, no. 5 (October 2004): 544–47. http://dx.doi.org/10.1590/s0100-41582004000500013.
Full textGanry, Jacky. "First works on Sigatoka control." Fruits 61, no. 5 (September 2006): A1—A2. http://dx.doi.org/10.1051/fruits/200661500.
Full textGanry, Jacky. "Citrus Tristeza – Banana Sigatoka disease." Fruits 62, no. 5 (September 2007): A1—A2. http://dx.doi.org/10.1051/fruits/200762500.
Full textKhan, M. A. H., I. Hossain, and M. U. Ahmad. "Impact of Weather on Sigatoka Leaf Spot of Banana (Musa spp. L.) and its Ecofriendly Management." Agriculturists 13, no. 2 (January 30, 2016): 44–53. http://dx.doi.org/10.3329/agric.v13i2.26587.
Full textKimunye, Janet, Kennedy Jomanga, Anthony Fredrick Tazuba, Evans Were, Altus Viljoen, Rony Swennen, and George Mahuku. "Genotype X Environment Response of ‘Matooke’ Hybrids (Naritas) to Pseudocercospora fijiensis, the Cause of Black Sigatoka in Banana." Agronomy 11, no. 6 (June 3, 2021): 1145. http://dx.doi.org/10.3390/agronomy11061145.
Full textEscudero, Cristian A., Andrés F. Calvo, and Arley Bejarano. "Black Sigatoka Classification Using Convolutional Neural Networks." International Journal of Machine Learning and Computing 11, no. 4 (August 2021): 323–26. http://dx.doi.org/10.18178/ijmlc.2021.11.4.1055.
Full textDissertations / Theses on the topic "Sigatoka"
Castelan, Florence Polegato. "Efeitos da infestação de Sigatoka Amarela e de Sigatoka Negra sobre a qualidade das bananas." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-04042013-122002/.
Full textBanana fruits are harvested at a green mature stage (pre-climacteric) in order to allow sufficient time for transport and marketing. This period is known as greenlife, and it is determined by the number of days between harvest and the initiation of the natural ripening process. Sigatoka Disease and, specially, Black Leaf Streak Disease are the main seriously problems in banana production, and it is also called by Yellow Sigatoka and Black Sigatoka, respectively. Although it is foliar diseases, the main damage is related to reduced quality and loss of market value. This study has investigated the effects of these diseases on the greenlife and other quality parameters; such as, pulp color, sensitivity to post-harvest rot, size and weight, respiration profile and ethylene daily production. Besides, it was preliminary evaluated the daily evolution of some of those and other parameters during the induced ripening process, as simulating fruit quality over retail market. Results indicate that greenllife is strongly reduced (about 50%) and it had no critical level of disease infestation. Respiratory intensity and ethylene production were increased and disorderly, for fruits from infested plots, specially by Black Sigatoka. Weight is 40 % reduced by Black Sigatoka. Yellow Sigatoka appear to have no influence on the sensitivity os post-harvest rot. However, Yellow Sigatoka caused an altered pulp color, similar to less intensity.
Saraiva, Lorenzo de Amorim. "Influência da infestação da bananeira pelas Sigatokas Negra e Amarela na qualidade das bananas: amido e açúcares." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-02102013-160510/.
Full textBanana is one of the most consumed fruits in the world and Brazil is the fourth largest producer of bananas in the world. The degradation of starch and sucrose synthesis are responsible for the sweetening and the quality of fruits. Banana producers in the Vale do Ribeira, southeastern state of Sao Paulo, have difficulty to achieve fruits with high quality, mainly due to Black Leaf Streak Disease and Sigatoka Disease, which are the two main disease problems of banana production. These two diseases cause necrosis in the leaves, reducing the photosynthetic active area of the plant and can also decrease the weight of bunches and fruits. Moreover, both diseases also cause alterations in post-harvest ripening of fruits. In order to better understand the changes caused by these diseases in the fruit ripening, studies were conducted on the starch-to-sugar metabolism, because of its importance for fruit quality. The experiment was conducted in 2008, in the Vale do Ribeira, where we selected three plots: one with the exclusive presence of S. Disease, another one with predominance of Black Leaf Streak disease and another area with an effective disease control. Disease infestation rate were determined by monitoring Severity Index, which is a visual estimate of the disease. To determine the physiological age of fruit, banana plants were marked at the flowering time and the mean temperature were measured daily. The fruits were harvested in two different physiological ages: 700 degree-days (GD) and 960 GD. The samples were also frozen during ripening. In these samples were analyzed the contents of starch, soluble sugars and oligosaccharides; and measured the activities of α-amylase, β-amylase and starch-phosphorylases. Leaf spot diseases caused different physiological disorders in post-harvest banana, but both diseases caused changes in patterns of respiration, ethylene production, green-life, accumulation and degradation of starch. Except for the green-life, which was similarly affected by both diseases, other factors were more severely affected by the Black Leaf Streak disease while the fruits of plants infected by the Sigatoka disease were very similar to control fruit. Both the accumulation and degradation of starch and enzymes, particularly of isoform β-amylase and the plastidial starch phosphorylase, involved in the degradation process were affected by Black Leaf Streak disease.
Loco, Ratu Aminisitai. "Hydrogeology of the Middle Sigatoka Valley, Southwest Viti Levu, Fiji." Thesis, University of Canterbury. Geological Sciences, 2011. http://hdl.handle.net/10092/5997.
Full textGonçalves, Valdeir Dias. "Interplantio de variedades de bananeira como prática de controle de Sigatoka /." Jaboticabal : [s.n.], 2006. http://hdl.handle.net/11449/92691.
Full textAbstract: The experiment was implanted in the area of the project Crer-ser, near to the Campus of UNIMONTES in Janaúba - MG, with the purpose of evaluating growth and production of the banana 'Prata Anã', 'Caipira' and 'Thap Maeo' in different planting systems, under the influence of yellow Sigatoka in the first and second cycle. The experimental design was of randomized blocks, with six treatments and four repetitions, with 25 plants in the plots of the treatments 1, 2, 3 and 5, and with 49 plants in the plots of the treatments 4 and 6. Between each plot, three rows were planted with the variety Prata Anã. Concerning to vegetative characteristics like circumference of the pseudostem and plant height in the first cycle, number of alive leaves in the crop in the first and second cycle, the variety Thap Maeo was superior in relation to the Caipira. Concerning to the characteristics of production, circumference and weight of the stalk, weight of the bunch, numbers of hands/bunch, number of fingers/ bunch and productivity the 'Thap Maeo' presented the largest averages in the two planting cycles differentiating significantly of the Caipira. The treatments in a row of border of the varieties Thap Maeo and Caipira were superior to the one with two rows of borders in the most evaluated productive characteristics do not differentiating significantly of the variety mixture. The analysis of the 'Prata Anã' inside of the six planting systems did not present significant differences for the evaluated vegetative xi characteristics, except number of alive leaves in the crop in the second cycle, while in the productive characteristics... (Complete abstract click electronic access below)
Orientador: Carlos Ruggiero
Coorientador: Silvia Nietsche
Banca: Ronaldo Posella Zaccaro
Banca: Antonio Baldo Geraldo Martins
Mestre
Gonçalves, Valdeir Dias [UNESP]. "Interplantio de variedades de bananeira como prática de controle de Sigatoka." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/92691.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O experimento foi implantado na área do projeto Crer-ser, próximo ao Câmpus da UNIMONTES em Janaúba - MG, com o objetivo de avaliar o crescimento e a produção das bananeiras Prata Anã, Caipira e Thap Maeo em diferentes sistemas de plantio, influenciados pela Sigatoka amarela no primeiro e segundo ciclo. O delineamento experimental foi o de blocos casualizados, com seis tratamentos e quatro repetições, com 25 plantas nas parcelas dos tratamentos 1, 2, 3 e 5, e com 49 plantas nas parcelas dos tratamentos 4 e 6. Entre cada parcela plantou-se três linhas com a variedade Prata Anã. Para as características vegetativas como circunferência do pseudocaule e altura de planta no primeiro ciclo, número de folhas vivas na colheita no primeiro e segundo ciclo, a variedade Thap Maeo foi superior em relação à Caipira. Nas características de produção circunferência do engaço, peso da ráquis, peso do cacho, números de pencas/cacho, número de frutos/cacho e produtividade, a Thap Maeo apresentou as maiores médias nos dois ciclos de plantio, diferenciando-se estatisticamente da Caipira. Os tratamentos com uma linha de bordadura das variedades Thap Maeo e Caipira foram superiores aos com duas linhas de bordaduras, na maioria das características produtivas avaliadas, não se diferenciando estatisticamente do interplantio. A análise da Prata Anã, dentro dos seis sistemas de plantio, não apresentou diferenças significativas para as características vegetativas avaliadas, exceto número de folhas vivas na colheita, no segundo ciclo. Nas características produtivas apresentou diferença significativa para número de pencas/cacho e número de frutos/cacho. Embora não tenham sido detectadas diferenças significativas para outros caracteres avaliados, houve uma tendência inferior para o sistema de plantio convencional da Prata Anã. Nas avaliações...
The experiment was implanted in the area of the project Crer-ser, near to the Campus of UNIMONTES in Janaúba - MG, with the purpose of evaluating growth and production of the banana 'Prata Anã', 'Caipira' and 'Thap Maeo' in different planting systems, under the influence of yellow Sigatoka in the first and second cycle. The experimental design was of randomized blocks, with six treatments and four repetitions, with 25 plants in the plots of the treatments 1, 2, 3 and 5, and with 49 plants in the plots of the treatments 4 and 6. Between each plot, three rows were planted with the variety Prata Anã. Concerning to vegetative characteristics like circumference of the pseudostem and plant height in the first cycle, number of alive leaves in the crop in the first and second cycle, the variety Thap Maeo was superior in relation to the Caipira. Concerning to the characteristics of production, circumference and weight of the stalk, weight of the bunch, numbers of hands/bunch, number of fingers/ bunch and productivity the 'Thap Maeo' presented the largest averages in the two planting cycles differentiating significantly of the Caipira. The treatments in a row of border of the varieties Thap Maeo and Caipira were superior to the one with two rows of borders in the most evaluated productive characteristics do not differentiating significantly of the variety mixture. The analysis of the 'Prata Anã' inside of the six planting systems did not present significant differences for the evaluated vegetative xi characteristics, except number of alive leaves in the crop in the second cycle, while in the productive characteristics... (Complete abstract click electronic access below)
Peixouto, Yslai Silva. "Estrutura genética de isolados do fungos causador da Sigatoka-amarela em bananeira." reponame:Repositório Institucional da UFRB, 2013. http://www.repositorio.ufrb.edu.br/handle/123456789/864.
Full textDentre as principais doenças que afetam a bananeira está a Sigatoka-amarela, causada pelo fungo Mycosphaerella musicola Leach. O objetivo do trabalho foi estudar a diversidade genética e estrutura populacional do fungo M. musicola nas principais regiões produtoras de banana, assim como verificar se a estrutura populacional está correlacionada com a origem geográfica. Para isto, foram avaliados 83 isolados coletados nos Estados da Bahia (BA), Rio Grande do Norte (RN) e Minas Gerais (MG) por meio dos marcadores SSR, ISSR e pela combinação dos dois (SSR/ISSR). De acordo com a AMOVA, para as três análises ocorreu maior variação genética entre os haplótipos dentro de municípios, em que apenas com o uso dos ISSR não foi significativo. Alta variabilidade foi detectada entre os isolados, com os primers combinados observou-se 100% haplótipos distintos, com os SSR 98,79 % de haplotipos únicos e com os ISSR foram 83,13 % haplótipos diferentes. Em relação à composição genética com base no agrupamento Bayesiano, notou-se a presença de 21 prováveis grupos ancestrais para as localidades em estudo com os primers combinados, diferente do que ocorreu com o uso dos SSR e dos ISSR, em que foram encontrados 14 prováveis grupos ancestrais. O maior valor de Gst foi de 0,11 entre RN e MG para os SSR, já o Nm que indica o fluxo gênico foi alto entre todos os Estados. Em relação ao IA e rd, a hipótese de recombinação sexual foi aceita para algumas microrregiões no estudo. Contudo, não foi detectada nenhuma estruturação da população de acordo com os locais de coleta, sendo que o conhecimento sobre a distribuição da variabilidade genética de M. musicola irá auxiliar nas estratégias para o controle da doença.
Among the major diseases affecting banana is yellow Sigatoka, caused by Mycosphaerella musicola Leach. The objective was to study the genetic diversity and population structure of the fungus M. musicola, the main banana-producing regions. Additionally, we investigated the population structure is correlated with geographic origin. For this, we evaluated 83 isolates collected in the states of Bahia (BA), Rio Grande do Norte (RN) and Minas Gerais (MG) through SSR, ISSR and the combination of the two (SSR / ISSR). According to AMOVA analysis for the three most genetic variation occurred among haplotypes within municipalities, in which only the use of ISSR was not significant. High variability was detected among isolates, with primers combined observed distinct haplotypes 100%, with 98.79% of SSR haplotypes with unique and ISSR were 83.13% different haplotypes. Regarding the genetic composition based on Bayesian clustering was noted the presence of 21 probable ancestral groups for study sites with primers combinations, different from what occurred with the use of SSR and ISSR were found in which the presence of 14 probable ancestral groups. The highest Gst was 0.11 between RN and MG for SSR, already Nm indicating gene flow was high among all states. Compared to IA and rd, the hypothesis was accepted for sexual recombination in some micro study. However, it was not detected any structuring of the population according to the sampling sites, and the knowledge about the distribution of genetic variability of M. musicola will assist in strategies to control the disease.
Dissertação submetida ao Colegiado de Curso do Programa de Pós-Graduação em Recursos Genéticos Vegetais da Universidade Federal do Recôncavo da Bahia e Embrapa Mandioca e Fruticultura, como requisito para obtenção do Grau de Mestre em Recursos Genéticos Vegetais.
Coello, Danilo Isaac Vera. "Componentes epidemiológicos e progresso da Sigatoka negra em bananeira e bananeira-da-terra." Universidade Federal de Viçosa, 2003. http://www.locus.ufv.br/handle/123456789/10120.
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A sigatoka negra, causada pelo fungo Mycosphaerella fijiensis, ocasiona perdas que oscilam entre 50 a 100% na produção de bananeira e bananeira-da-terra. Visando obter informação sobre epidemias da sigatoka negra em ambas as musáceas, realizaram-se dois experimentos. No primeiro, avaliaram-se os componentes epidemiológicos: períodos de incubação e latente médio; severidade aos 24 e 40 dias; freqüência de infecção; intervalo, em dias, para atingir a severidade máxima; dias transcorridos do aparecimento de sintomas até atingir a severidade máxima; e as áreas abaixo da curva da severidade e da porção necrosada. Verificou-se que M. fijiensis não foi específico para bananeira ou bananeira-da-terra e que as populações variam quanto à agressividade. A inoculação artificial em mudas pode ser usada para avaliar componentes de resistência de diferentes genótipos à doença. No segundo experimento, estudou-se o progresso da doença em plantações comerciais de bananeira 'Williams' e bananeira-da-terra 'Barraganete', durante as épocas seca e chuvosa. Independentemente da época avaliada, os valores de área abaixo da curva da severidade estimados para bananeira foram maiores que para bananeira-da-terra. Na época chuvosa, o progresso da doença foi maior que na época seca. Em bananeira-da-terra, detectou-se correlação significativa da severidade e o número de horas semanais com temperatura entre 24 e 28°C e umidade relativa maior de 90%, quando se consideraram os valores das variáveis climatológicas registrados quatro e três semanas antes da severidade, nas épocas seca e chuvosa, respectivamente. Não se detectou correlação significativa de severidade e intensidade de precipitação pluviométrica, nas duas épocas avaliadas. Este é o primeiro relato de estudos de sigatoka negra em bananeira-da-terra no Equador, nas épocas seca e chuvosa. É, também, o primeiro estudo de componentes epidemiológicos de isolados equatorianos de M. fijiensis. Os resultados obtidos serão importantes para subsidiar o manejo da sigatoka negra, bem como programas de melhoramento que visem obter resistência a M. fijiensis.
Black sigatoka, caused by the fungus Mycosphaerella fijiensis, is the most important leaf disease of banana and plantain crops, causing 50 to 100% production losses. To generate information regarding black sigatoka epidemics on both Musacea, two experiments were conducted. In the first, isolates of M. Fijiensis obtained from diseased leaves of banana and plantain from several regions of Ecuador, were inoculated in banana and plantain plantlets. The following epidemic components were evaluated: mean incubation and latent periods, initial severity, infection frequency, number of lesions/leaf area, days to reach maximum severity, area under disease progress curve for severity, and area under disease progress curve of leaf necrosis. Regarding all components, it was found that M. fijiensis was not specific for either banana or plantain, and that there is variability in fungal aggressiveness. It was concluded that artificial inoculation of M. fijiensis in plantlets can be used in evaluating disease resistance components of different genotypes. In the second experiment, disease progress was studied in commercial crops of banana 'Williams' and plantain 'Barraganete', during dry and rainy seasons. In both seasons, area under disease progress curve (AUDPC) on banana was higher than AUDPC for iplantain. Values of AUDPC in plantain were higher in the rainy season than in the dry season. Correlation analysis was done between weather variables and disease severity in plantains. Disease severity was not correlated with temperature, relative humidity, or precipitation. Significant correlation was detected between severity and both number of hours with temperature ranging from 24 to 28° C and relative humidity higher than 90%, when these variables were registered four or three weeks before severity assessment, in either dry or rainy seasons, respectively. This is the first report of epidemiological studies of Black Sigatoka in plantains in the dry and rainy seasons, in Ecuador. It is also the first study of aggressiveness components of M. fijiensis, which may become important to assist future breeding programs to obtain resistance against the pathogen.
Dissertação importada do Alexandria
Brito, Fabiane Silva Darosci. "Diversidade genética de populações de Mycosphaerella musicola e caracterização de efetores LysM em Mycosphaerella graminicola." reponame:Repositório Institucional da UnB, 2015. http://dx.doi.org/10.26512/2015.04.T.18969.
Full textA bananeira (Musa spp.) é cultivada em mais de 100 países, assumindo importante papel social e econômico, visto que é o fruto mais consumido no mundo. A quinta posição no ranking de produção é ocupada pelo Brasil, onde a Sigatoka-amarela é uma doença comum nos cultivos de bananeiras. Mycosphaerellamusicola(R. Leach ex. J. L. Mulder 1979)(Anamorfo: PseudocercosporamusaeZimm. Deighton), agente causal da doença, é a espécie de Mycosphaerellade maior ocorrência no país em relação às demais espécies. Pouco se sabe sobre a diversidade genética desse patógeno. Similarmente, pouco se sabe sobre a sensibilidade de M. musicolaa fungicidas DMI (inibidores da demetilação). Análises da influência de genes efetores LysM na patogênese de membros do gêneroMycosphaerellatambém são reduzidas. Nesse contexto, os objetivos datese foram verificar a ocorrência de recombinação sexual em populações de M. musicola de 13 diferentes zonas produtoras de banana no Brasil, por meio de análises dos genes matingtypes; caracterizar a diversidade genética das populações com base em 19 locos microssatélites; analisar a sensibilidade dos isoladosa fungicidas DMI e correlacionar o resultado com a ocorrência de mutações no gene CYP51 e, como componente adicional do trabalho, caracterizar o efetor de virulência - LysM em Mycosphaerellagraminicola. Com exceção de isolados coletados em uma das áreas do Distrito Federal e no Rio Grande do Norte, as populações mostraram proporção de 1:1 de genes MAT1-1-1 e MAT1-2-1, indicando a ocorrência de recombinação sexual nessas populações. Alto nível de diversidade genética foi observado entre indivíduos dentro das populações, fato que pode ser resultante da recombinação sexual. Um considerável número de migrantes entre populações de diferentes estados foram observados. Isso indica que ações antrópicas, como o transporte de folhas contaminadas, devem ter contribuído para o fluxo gênico e a homogeneização das populações, considerando que a dispersão por ascósporos é incomum a longas distâncias. A alta fração clonal nas populações sugere que a recombinação assexual emprega um importante papel na estrutura genética e apoia as evidências de dispersão conidial dentro das áreas produtoras de banana. Cinco isolados de M. musicolado Distrito Federal exibiram tolerância aos fungicidas tebuconazole, triadimenol e cyproconazole e um ponto de mutação no aminoácido do códon 461 foi observado nos mesmos isolados. Para a caracterização do efetor LysM, a patogenicidade da linhagem B3 de M. graminicolaexpressando GFP (proteína verde fluorescente) foi avaliada em 18 genótipos de trigo o que permitiu predizer que GFP não influencia na colonização do patógeno. A colonização de B3-GFP em folhas de trigo foi acompanhada via microscopiaconfocal de varredura a laser (CLSM) confirmando que GFP é expressa durante todo o ciclo de infecção do patógeno em folhas de trigo suscetíveis. Uma transformação via Agrobacteriumtumefaciensfoi realizada para a obtenção de uma linhagem B3-GFP mutante não funcional para o gene 3LysM. Entretanto, o DNA homólogo de 3LysM não foi integrado ao sítio alvo no genoma, sendo necessários novos experimentos para a obtenção da linhagem esperada. Os resultados obtidos contribuem para otimizar a compreensão sobre a epidemiologia do patógeno e aprimorar as medidas de controle da doença.
Commercial banana varieties (Musa spp.) are cultivated in over 100 countries, assuming important social and economic roles, given that this fruit is the most widely consumed globally. Brazil is the world's fifth largest producer, where yellow Sigatoka is the most common banana disease in production areas. Mycosphaerella musicola (R. Leach ex. J. L. Mulder 1979)(Anamorfo: PseudocercosporamusaeZimm. Deighton), causal organism of the disease, is the most commonly occuring Mycosphaerella species in the country. Limited analysis of genetic diversity of this pathogen has been conducted to date.Similary, little is known regarding fungicide sensitivity of M. musicola to DMI(demethylation inhibitor) fungicides. Analysis of pathogen effector LysM genes and their influence on the pathogenesis of Mycosphaerella members is also limited. In this context, the goals of this study were to verify the occurrence of sexual recombination in M. musicolapopulations from 13 different agroecological zones across Brazil, based on analysis of mating type idiomorphs; characterize population genetic diversity by comparison of 19 microsatellite loci; analyse isolate sensitivity to DMI fungicide and correlate the results with the occurrence of mutations in the CYP51 gene and, as a additional component of the work, characterize the virulence effector – LysM in Mycosphaerellagraminicola. With the exception of isolates collected in one area of the Distrito Federal and Rio Grande do Norte, populations displayed 1:1 proportions of mating type gene idiomorphs MAT1-1 and MAT1-2, indicating the occurrence of sexual reproduction as an evident process in M. musicolapopulations. Greatest genetic diversity occurred among individuals within populations, which may be the result of sexual recombination. A considerable number of migrants between populations from different states were observed. These results indicate that anthropic action such as transport of contaminated germplasm may be contributing to gene flow and the genetic homogenization of populations, when considering that ascospore dispersal is uncommon over large distances. The high clonal fraction in populations suggests that asexual reproduction plays an important role in the genetic structure, supporting documented evidence of conidial dispersal within banana blocks. Five M. musicolaisolates from Distrito Federal exhibited low sensibility to tebuconazole, triadimenol and cyproconazole fungicides, with one point mutation in an amino acid at codon 461 observed across all these isolates. For LysM effector characterization, the pathogenicity of M. graminicolastrainB3 expressing GFP (green fluorescent protein) was evaluated on 18 wheat genotypes, shown that GFP had no influence on pathogen colonization. Colonization of the B3-GFP in wheat leaves was followed via confocal laser scanning microscopy (CLSM). The results confirmed that GFP is expressed during the whole infection cycle of the pathogen on susceptible wheat leaves. Agrobacterium tumefacienswas used to mediate transformation to generate knockout constructs for 3LysM in B3-GFP. The 3LysM homologous DNA was not integrated in the target genomic site, such that continued experiments are required to develop the desired strain for further analysis of the influence of LysM on M. graminicolapathogenesis. The results contribute to our understanding of pathogen epidemiology and contribute to development of enhanced disease control measures.
Field, Julie S. "The evolution of competition and cooperation in Fijian prehistory archaeological research in the Sigatoka Valley, Fiji /." Thesis, University of Hawaii at Manoa, 2003. http://proquest.umi.com/pqdweb?index=0&did=765031501&SrchMode=1&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1233790945&clientId=23440.
Full textFrizo, Cesar Gonçalves Afonso. "Prospecção de obstáculos à bananicultura sustentável." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-23042015-131454/.
Full textVale do Ribeira São Paulo is the main banana producing region of Brazil, it is an important area for biodiversity conservation, but also one of the poorest areas of the state. For that reason, new forms of banana cropping, more sustainable, such as organic agriculture for example, are necessary that be considered as a way to promote local development while minimizing negative environmental impacts. Therefore, it is essential that the main problems of the agrarian system in question are clearly known, in order to allow system improvements proposals that are well connected to reality. We discussed these issues, at the scale of region agricultural system, through analysis of data from the last agricultural census of Brazil, conducted by IBGE, for the prior construction of organic agriculture and organic fruit production panorama at the country. Subsequently we conducted 11 case studies which exemplify unique experiences of banana cropping in the region, these studies were combined with agronomic data collected in the first half of 2014, moreover we have done several interviews with key players of Vale do Ribeira banana agricultural system. We found that there is a trend towards the larger the area of properties, the higher proportion of certified organic practice. This data shows that, proportionally, the interest in organic certification is higher among large farms than among minors. Nonetheless, at Vale do Ribeira this trend is not observed, as the region organic banana farming is mainly a small and marginal farmers activity carried on, generally without a historical approach and knowledge of the organic movement. Besides there is the fact that the main sustainability constraints of Vale do Ribeira banana agricultural system are the lack of ecological means of fertility restoration, due to the undercapitalization faced by producers, and the imposition by the market, especially the city of São Paulo, to the cultivation of varieties highly susceptible to sigatoka. This problem could be overcome through means that facilitate the access of poor farmers to organic and ecological manure, and through greater union of producers, taking advantage of the organic market greater acceptance for unusual products, such as the resistant varieties of bananas, where the sales would be easier. Although, the situations of little information and integration of organic producers make these actions difficult.
Books on the topic "Sigatoka"
Parry, J. T. The Sigatoka Valley: Pathway into prehistory. Suva, Fiji: Fiji Museum, 1987.
Find full textOrjeda, Gisella. Evaluation of Musa germplasm for resistance to Sigatoka diseases and Fusarium wilt. Montpellier: International Network for the Improvement of Banana and Plantain in association with, 1998.
Find full textDadzie, B. K. Post-harvest characteristics of black Sigatoka resistant banana, cooking banana and plantain hybrids. Montpellier: International Network for the Improvement of Banana and Plantain in association with, 1998.
Find full textSerge, Belloni. Sigatoka Town Council prelimary work on the formulation of a strategy of development for the next decade (8-14th July 1998). Port Vila, Vanuatu: ESCAP/POC United Nations ESCAP Pacific Operations Centre, 1998.
Find full textJohanson, A., and Andrea Johanson. Detection of Sigatoka Leaf Spot Pathogens of Banana by the Polymerase Chain Reaction. Hyperion Books, 1997.
Find full textSigatoka: The Shifting Sands of Fijian Prehistory (University of Southampton Department of Archaeology Monograph). Hirmer Verlag GmbH, 2000.
Find full textNew frontiers in resistance breeding for nematode, fusarium and sigatoka: Proceedings of the workshop held in Kuala Lumpur, Malaysia, 2-5 October 1995. Rome: IPGRI, 1996.
Find full textBook chapters on the topic "Sigatoka"
Sowmya, H. D., T. R. Usharani, C. Sunisha, and Sukhada Mohandas. "Engineering Resistance to Sigatoka." In Banana: Genomics and Transgenic Approaches for Genetic Improvement, 227–36. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1585-4_15.
Full textUpadhyay, Anand, Neha Maria Oommen, and Siddhi Mahadik. "Identification and Assessment of Black Sigatoka Disease in Banana Leaf." In Advances in Information Communication Technology and Computing, 237–44. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5421-6_24.
Full textSubert-Semanat, Andrés. "Poster: Wireless Sensor Network to Predict Black Sigatoka in Banana Cultivations." In Smart Industry & Smart Education, 159–64. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95678-7_18.
Full textMarcano, Iris-Esther, César-Antonio Díaz-Alcántara, Victoria Seco, Beatriz Urbano, and Fernando González-Andrés. "Induced Systemic Resistance Could Explain the Reduction in the Incidence of Black Sigatoka (Mycosphaerella fijiensis) in Banana Plants Inoculated with Bacteria Isolated from Banana Tree Roots in the Dominican Republic." In Biological Nitrogen Fixation and Beneficial Plant-Microbe Interaction, 155–70. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32528-6_14.
Full text"Sigatoka." In Encyclopedic Dictionary of Archaeology, 1251. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58292-0_190603.
Full text"A View of Fiji and the Sigatoka Region." In Under the Ivi Tree, 34–42. Routledge, 2013. http://dx.doi.org/10.4324/9781315017860-8.
Full textCoelho, Elizangela Barbosa, Luzia Correa Dunenemann, and Francenilson da silva. "LEVANTAMENTO FITOPATOLÓGICO DE DOENÇAS DA BANANEIRA COM ÊNFASE À SIGATOKA NEGRA (Mycosphaerella fijiensis, MORELET) EM ASSENTAMENTOS NO MUNICÍPIO DE THEOBROMA – RONDÔNIA." In Aspectos Fitossanitários da Agricultura, 93–100. Atena Editora, 2020. http://dx.doi.org/10.22533/at.ed.40920130311.
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