Phytoplasma
Mostrando 25-36 de 46 artigos, teses e dissertações.
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25. Evaluación del color y la posición de trampas en la captura de cicadélidos en Gaultheria phillyreifolia (Ericaceae) afectadas por fitoplasmas
Color sticky traps are one of the main alternatives to collect insect vectors, as they are easy to handle and are inexpensive. We aimed to compare the effect of color and height of the traps on the attractiveness to potential cicadellids vectors of plant pathogens. Yellow and green colored stick traps were placed at two different heights in plant of Gaulther
Neotropical Entomology. Publicado em: 2009-12
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26. Candidatus Phytoplasma brasiliense associado ao superbrotamento do hibisco (Hibiscus rosa-sinensis L.) no Estado de São Paulo
Plantas de hibisco com superbrotamento e definhamento seguido de morte têm sido observadas nos municípios de São Paulo, Campinas e Piracicaba. Como os sintomas são sugestivos daqueles induzidos por fitoplasmas, o presente trabalho buscou identificar o possível fitoplasma associado com a doença. Assim, 14 plantas sintomáticas de hibisco foram coletadas
Summa Phytopathologica. Publicado em: 2009-09
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27. Identificação molecular de um fitoplasma associado à malformação das folhas das ornamentais Celosia argentea L. e Celosia spicata L. / Molecular identification of a phytoplasma associated with malformation of the leaves of Celosia argentea L. and Celosia spicata L.
Plants belonging to the species Celosia argentea and Celosia spicata are appreciated as ornamentals due to their colorful flowers. Recently, plants of both species exhibiting typical symptoms induced by phytoplasmas, characterized by deformed leaves, proliferation of axillary shoots, stunt and phyllody were found in public places in Piracicaba, SP, Brazil. T
Publicado em: 2009
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28. Amarelos da videira: identificação e análise filogenética dos fitoplasmas, transmissão dos agentes causais e otimização da diagnose / Grapevine yellows: identification and phylogenetic analyses of the phytoplasmas, transmition of the causal agents and diagnosis optimization
Phytoplasmas are wall-less prokaryotes, phloem-limited plant pathogens, belonging to Mollicute class. They are agents of diseases that cause serious damage to a diversity of cultivated especies. Grapevine (Vitis sp) is the third most cultivated fruit crop in the world and it has high economical impact in Brazil. Phytossanitary aspects are important productio
Publicado em: 2009
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29. Passion fruit proliferation phytoplasma: molecular identification, phylogenetic analysis and proof of pathogenicity / Fitoplasma do superbrotamento do maracujazeiro: identificação molecular, análise filogenética e prova de patogenicidade
Phytoplasmas are cell wall-less prokaryotes and phloem-inhabitants associated with diseases that affect several crops. Passion fruit plant is a tropical species cultivated in various Brazilian regions. Diseases are among factors that may cause damage to this crop and the passion fruit witchesbroom has been revealed as very important one. That disease, associ
Publicado em: 2008
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30. Transmissibility of chayote witches broom phytoplasma (ChWBIII) and variability of phytoplasmas associated with other plant species. / Transmissibilidade do fitoplasma do superbrotamento do chuchuzeiro (ChWBIII) e variabilidade de fitoplasmas associados a outras espécies botânicas.
Fitoplasmas são procariotos sem parede celular associados com inúmeras enfermidades de espécies de plantas no mundo. Esses patógenos na natureza são transmitidos por insetos que se alimentam do floema das plantas. Como os fitoplasmas não podem ser cultivados in vitro empregam-se técnicas moleculares para sua diganose e caracterização No Brasil, o su
Publicado em: 2008
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31. Molecular identification of phytoplasmas associated to cabbage stunt and epidemiological analysis of disease / Identificação molecular de fitoplasmas associados ao enfezamento do repolho e análise epidemiológica da doença
A disease called stunt, of unknown etiology, has occurred in cabbage crops located in the green belt region of the São Paulo State (Brazil). The disease has caused serious yield losses in the last years. The symptomatology exhibited by the affected plants has been characterized by foliar chlorosis, intense red coloration of leafs, general stunt, shoot proli
Publicado em: 2007
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32. Gramíneas forrageiras como potenciais hospedeiros alternativos para o fitoplasma do enfezamento vermelho do milho / Grasses as potential alternative hosts for the maize bushy stunt phytoplasma
Maize bushy stunt, caused by a phytoplasma, was reported in Brazil in the beginning of the seventies, and it was considered as not important for corn. Since the middle of the eighties decade, when the later planting practice and irrigation were adopted, the disease became relevant. Currently, maize bushy stunt represents one of the most important diseases an
Publicado em: 2006
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33. Detecção e identificação molecular de fitoplasmas associados ao amarelo da videira. / Detection and molecular identification of phytoplasmas associated to grapevine yellow disease.
Yellows diseases are associated with phytoplasmas, wall-less prokaryotes, inhabitant of phloem vessels. Damage caused by these diseases are relevant for some important cultivated botanical species. Grapevine yellows diseases have been observed in several areas of the world, but in Brazil the presence of these diseases had not been reported yet. In vineyards
Publicado em: 2005
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34. Detecção e identificação molecular de um fitoplasma do grupo 16SrIII em plantas de maçã com sintomas de lenho mole. / Detection and molecular identification of a phytoplasma of the group 16sriii in apple plants with rubbery wood symptoms.
The proliferation and rubbery wood diseases which are associated with phytoplasma are some of the diseases that occur in apple trees (Malus spp). In the case of rubbery wood disease, phytoplasm is not totally accepted as its causal agent. However, several researches by using electron microscopy and tissue grafting, have been able to show the phytoplasma asso
Publicado em: 2004
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35. Molecular identification of phytoplasma associated to tomato (Lycopersicon esculentum) and eggplant (Solanum melongena) stunting. / Identificação molecular de fitoplasma associado ao enfezamento do tomateiro (Lycopersicon esculentum) e da berinjela (Solanum melongena).
Fitoplasmas, procariotos sem parede celular e habitantes de floema, têm causado danos consideráveis em diversas culturas comercialmente importantes. A associação desses fitopatógenos com várias doenças que ocorrem em espécies hortícolas têm sido comumente registradas tanto no território brasileiro como em outras regiões do mundo. Em áreas de pla
Publicado em: 2004
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36. Incidência de viroses e enfezamentos e estimativa de perdas causadas por molicutes em milho no Paraná
O objetivo deste trabalho foi avaliar a incidência de viroses e enfezamentos e estimar as perdas causadas por enfezamentos na cultura do milho safrinha. Os diagnósticos baseados em sintomas foram confirmados por PCR ou RTPCR. Em todas as lavouras, foram identificadas plantas com sintomas de enfezamentos, em incidência de 6,2% a 49,9% (média de 20,7%). Na
Pesquisa Agropecuária Brasileira. Publicado em: 2003-01