It has been suggested that the disease occurs more when soils possess too much nitrate. Potash can be applied to the soil to help reduce nitrate levels.
Any Allium weeds with potential to harbour the disease should be removed promptly.
Allow plenty of space between plants and provide sufficient drainage.
If Leeks, Chives and Garlic begin to show pustules, then apply Vaseline to prevent the spread of spores.
Make sure tools and boots are cleaned between visiting different allotments and gardens.
If a bad attack is experienced, a long period of crop rotation is advised. It's recommended to wait between 4-5 years before using the site again for growing Leek, Garlic and Chive.
More resistant cultivars include 'Walton Mammoth', 'Apollo', 'Poribleu', 'Autumn Poristo', 'Spendid' and 'Titan'.