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Re: Downy Mildew on onions and shallots

Angus Macdonald wrote:
> 
> Anybody out there know how to control downy mildew on onions and
> shallots?  For the second year running I've been afflicted in this way
> - no doubt due to wet and mild weather.  The shallots, I've lifted.
> The onions are not ready.  They've had prophylactic spraying with
> Diathane 945 and post-symptom spraying but to no effect.  The onions
> have not collapsed yet but they have all the symptoms.  What to do?
> 
> Also, rust on garlic.  This crop is supposed to be trouble free but
> this year there has been more rust than green.  Will the bulbs store?
> 
> Any suggestions gratefully received.


I've never had but the odd case of fungus on onions, leeks and garlic,
so I have little experience in controlling these types of problems.  I
usually find that, when confronted with other fungus problems, a heavy
mulch of compost seems to reduce or prevent damage.  The compost must
have been made under very hot aerobic conditions for this to work. 
Anaerobic compost just makes things worse.

Steve  (Maritime...)
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