Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:12:26.1515337Z
   3
Cowpea Cercospora leaf spot (303)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Worldwide distribution. On food legume, e.g., cowpea, French and mung beans. Pod numbers and seeds reduced on susceptible varieties.
  • Reddish-brown fungal spots, up to 15 mm diameter, circular to angular, merging, often with a yellow halo. Leaves fall early.
  • Spread by spores blown in wind, and splashed in rain. Survival is in debris left after harvest, and on alternative hosts.
  • Cultural control: certified seed or seed with plant debris removed; interplant e.g., cowpea with maize or sorghum; remove volunteers; plant away from diseased crops; collect and destroy debris after harvest; resistant varieties.
  • Chemical control: use mancozeb after flowering and when pods start to develop. Use 2-3 sprays per crop.

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