TY - SER AU - Mora-Umana,F. AU - Barboza,N. AU - Alvarado,R. AU - Vasquez,M. AU - Godoy-Lutz,G. AU - Steadman,J.R. AU - Ramirez,P. TI - Virulence and molecular characterization of Costa Rican isolates of Rhizoctonia solani from common bean KW - FEIJÃO KW - RHIZOCTONIA KW - VARIAÇÃO GENETICA KW - GENETICA MOLECULAR ER -