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This study aimed to evaluate the in vitro behavior of the fungus Fusarium guttiform in different conditions of temperature and luminosity and determine the most efficient inoculation method for evaluating the resistance of pineapple to fusariosis. To determine the in vitro behavior, two experiments was performed, with the same design, conduction, and evaluation. It was used a completely randomized experimental design in a factorial arrangement of 3x3 (three temperatures and three light regimes), with five replications. The evaluations of inoculation methods were conducted in a completely randomized design with factorial arrangement 3x4 (methods x distance of inoculation). D leaves of pineapple, cultivar Pearl, were inoculated at two, five, eight and eleven centimeters from the base by the methods of infected toothpick, mycelium disc without injury and mycelium disc with injury on the leaf. There was no significant difference on in vitro behavior of the isolates analyzed. The indicated temperature and luminosity for the multiplication of F. guttiform were 25°C and 12 hours, respectively, since they showed significant my celial growth and increased production of reproductive structures. The indicated method for evaluation of resistance to fusariosis in pineapple was the inoculation by infected toothpick at a distance between 2 - 11 cm from the base of the leaf. It becomes necessary to perform an injury at the site to be inoculated for the infection of the pathogen F. guttiform occurs.

COMPORTAMENTO IN VITRO DO AGENTE ETIOLÓGICO DA FUSARIOSE E AVALIAÇÃO DE MÉTODOS DE INOCULAÇÃO EM ABACAXIZEIRO