International Problems in Tropical Plant Pathology.. John E. Bowman, PepsiCo Foods International, Dallas, TX. . Plant Dis. 73:592. . This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1989. DOI: 10.1094/PD-73-0592.