- Worldwide distribution. On Vigna species, crops (cowpea, long bean) and weeds. Another species infects Phaseolus. Rust comes late, and the impact is relatively small.
- Reddish-brown, circular pustules with yellow halos on leaves and pods, producing powdery spores.
- Spread by spores blown in the wind.
- Cultural control: plant beans with maize, at random, not in rows; use a 2-year crop rotation; do not plant overlapping crops; resistant varieties; collect and burn trash after harvest.
- Chemical control: use mancozeb, starting when the spots are first seen.
Pacific Pests, Pathogens and Weeds - Online edition
Pacific Pests, Pathogens, Weeds & Pesticides
Bean (Vigna) rust (234)
Bean rust
Uromyces vignae
AUTHOR Grahame Jackson
Infomration from CABI (2019) Uromyces vignae (rust: cowpea). Crop Protection Compendium. (https://www.cabi.org/cpc/datasheet/55871). Photo 1 Kohler F, et al. (1997) Diseases of cultivated crops in Pacific Island countries. South Pacific Commission. Pirie Printers Pty Limited, Canberra, Australia. Photo 2 Yuan-Min Shen, Taichung District Agricultural Research and Extension Station, Bugwood.org.
Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.