Leek rust
Puccinia allii
This description was machine-translated.
How to spot it
Leek rust is a fungal disease on leek, garlic, onion and chives. Bright orange yellow, elongated spore pustules form on the leaves and leaf sheaths, which burst open and dust off rust coloured powder. With a heavy infestation the foliage yellows and dies off prematurely. The leek stays usable, but grows more weakly and forms thinner stems.
Prevention
Apply nitrogen sparingly, since lush foliage is especially prone to rust, and keep the stand airy with wide spacing. Water in the morning at the root rather than over the leaves and remove the first infested leaves promptly. Clear away crop residues thoroughly and keep a three to four year break from growing any alliums on the plot.
Affected plants
These plants in our database are especially susceptible.
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