Briefly, three to five young leaves were sprinkled with 600-mesh carborundum and rubbed individually with a sterile cotton swab previously dipped in the inoculum.
Brevemente, tres a cinco hojas jóvenes de las plantas se espolvorearon con carborundum de 600 mallas y se frotaron de manera independiente con un hisopo estéril previamente humedecido con el inóculo.