Knowledgebase
How can I control leek rust?
Posted by Dobies Staff on 04 December 2014 01:20 PM

Damp, wet summers are ideal for the spread of the fungal disease leek rust. It can be widely found attacking leeks, onions, garlic, shallots and chives. Orange spores can be found on the on the leaves resulting in the foliage turning yellow and dying back.

Infected foliage should be removed as soon as the symptoms are seen and in severe attacks badly afffected plants should be destroyed. Infected material should not be put on the compost heap. Plants grown on soils that have a high nitrogen content, or fed with a nitrogenous fertilizer, may produce softer growth which can be more prone to attack.

When planting choose a well-drained site and apply Sulphate of Potash at 15-20g per sq. metre to help toughen the growth. Planting at wider spacings will improve air movement around the plants, reducing the risk of attack, as will working on a rotation of 4-5 years , if possible, between susceptible crops.

 

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