Made available in DSpace on 2014-06-11T19:33:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-12-12Bitstream added on 2014-06-13T19:04:54Z : No. of bitstreams: 1 almeida_ej_dr_jabo.pdf: 2925633 bytes, checksum: 1794e969fffc6c2ce4cdd74354b559fc (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Este trabalho teve os objetivos de estudar comparativamente os caracteres morfológicos e morfométricos úteis para distinção entre Meloidogyne mayaguensis e M. incognita; quantificar os danos causados à goiabeira ‘Paluma’, em formação, por M. mayaguensis em níveis crescentes de inóculo; caracterizar o desbalanço nutricional e a fenologia da goiabeira ‘Paluma’ face à infecção pelo nematóide; avaliar a hospedabilidade de outras frutíferas e plantas invasoras a esse patógeno; estudar a flutuação populacional do nematóide em pomar de goiabeira ‘Paluma’; prospectar materiais resistentes a M. mayaguensis dentre diversos acessos de Psidium guajava e Psidium spp. e avaliar a compatibilidade desses materiais como porta-enxerto para goiabeira ‘Paluma’. Os dados indicam que a morfologia do padrão perineal e da região labial dos machos são suficientes para a distinção segura entre M. mayaguensis e M. incognita. As medidas do diâmetro do tronco, comprimento das três pernadas, massa fresca e seca da parte aérea, retirada nas podas, área de folhas individuais, comprimento, largura, número por planta e massa dos frutos foram inversamente proporcionais aos níveis de inóculo de 0, 10, 100, 1.000 e 10.000 ovos e juvenis/planta. Os teores de N, P e K decresceram de folhas sem sintomas para folhas com o sintoma leve e severo, nas análises realizadas em fevereiro e agosto. / This work had the objectives of to study the morphologic characters and useful morfometric comparatively for distinction between Meloidogyne mayaguensis and M. incognita; to quantify the damages caused to the guava 'Paluma', in growing, for M. mayaguensis in growing levels of inocula; to characterize the nutritional imbalance and the fenology of the guava 'Paluma' face to the infection for the nematode; to evaluate the host suitability of other fruitful ones and its weeds to that pathogen; to study the population fluctuation of the plant parasitic nematode in guava orchard 'Pedro Sato'; resistant material prospect to M. mayaguensis between several accesses of Psidium guajava and Psidium spp. and to evaluate the compatibility of those materials as rootstock for guava 'Paluma'. The data indicate that the morphology of the perineal pattern and of the labial area of the males they are enough for the distinction it holds between M. mayaguensis and M. incognita. The measures of the diameter of the log, length of the three blanches, fresh and dry mass of the blanches, retreat in the pruning, area of individual leaves, length, width, number for plant and mass of the fruits was inversely proportional at the levels of inocula of 0; 10; 100; 1,000 and 10,000 eggs and juveniles/plant. The tenors of N, P and K decreased of leaves without symptoms for leaves with the light and severe symptom, in the analyses accomplished in February and August. The Ca had your concentration increased with the worsening of the symptoms, in February and August and Mg only in August. Sulfur had a larger concentration in leaves without symptoms, in February. In August, the leaves with severe symptoms presented larger concentrations of S.