Claudio R. Cafati K.1 e Hiroshi Kimati2

The present research was done in order to study the behavior of commercial varieties of beans in the States of São Paulo and of foreing germplasm, with resistance antecedents, to different isolates of Xanthomonas phaseoli and Xanthomonas phaseoli var. fuscans.
Varietal reaction tests were conducted under controlled greenhouse conditions. Inoculum preparation and method of inoculation were those described by Coyne et al (1966) with some modifications.
In all tests, observations were made from the appearance of the first symptoms throughout the complete development of the disease. Plants were rated for disease reaction 40 days after inoculation according to the scale described by Coyne et al. (1966).

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1Ing. Agr., M. S., Proyecto Leguminosas, Papas, Hortalizas. Estación Experimental La Platina, Instituto de Investigaciones Agropecuarias (INIA), Casilla 5427, Santiago, Chile.
2Ing. Agr., M. S., Doctor en Agronomia, Profesor del Departamento de Fitopatología de la Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Brasil.

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