Arneson, P.A. 2000. Coffee rust. The Plant Health Instructor. DOI: 10.1094/PHI-I-2000-0718-02
Updated, 2005.

DISEASE:  Coffee rust

PATHOGEN:  Hemileia vastatrix - currently found in nearly all the world's coffee-growing regions.
H. coffeicola - restricted to central and western Africa, especially the higher and cooler regions.

Coffee rust is the most economically important coffee disease in the world, and in monetary value, coffee is the most important agricultural product in international trade.

Figure 1. Click Image for more detail.

HOSTS:  Coffea arabica (arabica coffee) and Coffea canephora (robusta coffee), the two most important commercial coffee species, and perhaps as many as 25 other species of Coffea. Existence of an alternate host has been postulated, but none have been found.

Author
Phil A. Arneson
Cornell University