Yellows Plant Disease
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. 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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2. 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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3. Pathogenicity of Fusarium oxysporum f. sp. phaseoli, nitrogen fertilization and common bean yield. / Patogenicidade de Fusarium oxysporum f.sp. phaseoli, adubação nitrogenada e produtividade de feijão.
Brazil is one of the biggest world growers and consumers of common bean, that is one of the main protein sources in the feeding habits of the significantly population plot. Even if present prominence in the world common bean production, the Brazilian yield is very low. In the spring-summer 2002 the yield was about 926 kg.ha-1, a value much lower than the cro
Publicado em: 2005
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4. Nonradioactive Screening Method for Isolation of Disease-Specific Probes To Diagnose Plant Diseases Caused by Mycoplasmalike Organisms
DNA fragments of tomato big bud (BB) mycoplasmalike organism (MLO) in diseased periwinkle plants (Catharanthus roseus L.) were cloned to pSP6 plasmid vectors and amplified in Escherichia coli JM83. A nonradioactive method was developed and used to screen for MLO-specific recombinants. Cloned DNA probes were prepared by nick translation of the MLO recombinant
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5. Evidence on Possible Mycoplasma Etiology of Aster Yellows Disease II. Suppression of Aster Yellows in Insect Vectors
Chlortetracycline or chloramphenicol (but not kanamycin, penicillin, or erythromycin), when administered in hydroponic solution to diseased aster, reduced the availability of the aster yellows (AY) agent to nymphs of Macrosteles fascifrons (Stål). Insects exposed to healthy plants whose roots were immersed in chlortetracycline were able to acquire AY agent