Pacific Pests, Pathogens and Weeds - Online edition

Pacific Pests, Pathogens & Weeds

Bean (Vigna) rust (234)

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Photo 1. Rust, Uromyces vignae, on the upper surface of a yard-long bean leaf.

Photo 2. Cose-up infected leaf of a yard-long bean leaf with bean rust, Uromyces vignae.

Summary

  • 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.

Common Name

Bean rust

Scientific Name

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.

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