This is another fungal infection which usually appears from late summer through the winter.

 

Symptoms are a white die back of the leaf tips, white patches appearing on other parts of the leaf and stem, and stunted growth.  Infected leaves look watery, thin and papery, eventually they rot away.  

 

Besides looking unpleasant, infected leeks wilt quickly and will not keep at all.  Badly infected leeks should be removed and destroyed, and the remainder sprayed fortnightly with a fungicide until all the white patches disappear.

 

 

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