Leek Rust

Leek rust is caused by the fungus Puccinia allii.  While severe attacks can reduce yield directly, the main economic impact is from its importance as a leaf blemish that downgrades the quality. As leek rust is active for most of the year, it remains a challenge for control as numerous fungicide treatments may be required on overwintered crops.

In this factsheet you can find out about:

  • the background of the disease
  • what symptoms to look out for
  • what environmental conditions favour the development of infections
  • the lifecycle of the pathogen
  • information about varietal resistance
  • what fungicides to use and when
  • what agronomic practices to consider to reduce infections

This information was last updated in 2011.

Useful links

Read about SCEPTREplus work for Alliums

Read the SCEPTREplus report on Leek Rust