Onion
 Courtesy EcoPort (http://www.ecoport.org): Pankaj Oudhia
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Onion Allium cepa
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 Courtesy EcoPort (http://www.ecoport.org): MEDIMPEX, Hungary.
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Onion (Allium Cepa), a drawing of the whole plant,flower and bulb.
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 A.A.Seif, icipe
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Onion nursery
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 A.M. Varela, icipe
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Rust on onion
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 A. M. Varela, icipe
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Purple blotch on onion. Leaf-tip dieback is a typical symptom of infection by Alternaria porri on onion.
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 A. M. Varela, icipe
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Thrips damage on onions. Note silvering and blotching of leaves.
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 A. M. Varela, icipe
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Close-up of advanced purple blotch spot.
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 David B. Langston, University of Georgia, Bugwood.org
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Fusarium basal rot on onions
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 Whitney Cranshaw (www.ecoport.org)
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Thrips symptoms on onion - typical silvering and blotching of leaves.
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 Denis Persley and Tony Cooke, Department of Primary Industries and Fisheries, Queensland, Australia (Courtesy of EcoPort, www.ecoport.org)
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Onion smudge. Small, round, dark blotches develop on bulbs, with a zonate pattern on the outer scale leaves.
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 Judith K. Brown. Reproduced from the Crop Protection Compedium, 2004 Edition. © CAB International, Wallingford, UK, 2004.
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Downy mildew advanced symptoms on onion plant
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 David B. Langston, University of Georgia, Bugwood.org
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Sour skin of onion.
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