Onions - white spots on leaves
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sirpsycho Rank attained: Pedunculate oak tree
Joined: 15 Mar 2010 Posts: 341 Location: Stamullen, Co Meath
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Posted: Mon Jul 11, 2011 8:34 am Post subject: Onions - white spots on leaves |
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I noticed a lot of my onions have white spots on their leaves. After googling, it appears I have Botrytis leaf blight.
Can anyone recommend an over-the-counter cure? |
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michael brenock Rank attained: Chlorophyll for blood
Joined: 12 Aug 2008 Posts: 1275 Location: cork
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Posted: Wed Jul 20, 2011 9:10 pm Post subject: |
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more likely you got Cladosporium leaf blight which is always worse in wet weather and overwintered onions are usually the carriers of the disease.There is no real cure for it as it is more weather related and avoid growing overwintered onions. Botrytis dries up in dry weather but Cladosporium does not. Cladosporium also develops a type of black eve from the small white spots coalescing.
michael brenock horticultural advisor iretired) |
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