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Onion smut (Urocystis cepulae) is a disease of onions. This disease is absent from Western Australia.
Onion rust (Puccinia allii) is a disease of plants in the onion family, including onions, garlic, chives, spring onions and leeks.
White rot of Allium species (caused by Sclerotium cepivorum) has been confirmed in garlic from a Perth backyard and a property in the Swan Valley.
Spring onions are grown mainly on the Swan Coastal Plain for the Western Australian local market. They differ from shallots and bulb onions as they have small enlarged bulbs with straight, hollow l