By cutting the basal part of an infected rice leaf and immersing the cut end in a dilute solution of basic fuchsin for 1 to 2 days, the latent lesions of bacterial leaf blight which were invisible before staining were clearly separated from the stained healthy parts of the infected leaves. The absorption of stain was somewhat influenced by the age of the rice leaf. The entire rice plant also may be stained to demonstrate the diseased area.
