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Wetting agent?
Lat year I had terrible problems with downy mildew on my onion bed.It
was a fairly wet summer (Herefordshire)and I tried to spray the onions with a copper solution in late June when I observed the mildew,but found that it didnt work.I think that one of the problems was that I sprayed too late-some of the older gardening books suggest May or when the onions are 8" or so high,so I will be trying that this year.Another problem was that the spray (however fine the nozzle was set) did not stick onto the smooth onion,but gathered in circular globules. So I am looking for a wetting agent. Some have suggested using washing up liquid,but I do not know in what concentration and someone else has advised me not to use it anyway.I went to our local garden centre,and they told me that it is not available in the retail trade,since one has to have a licence to use it. So how do other gardeners get their sprays to stick to prevent their onions getting downy mildew? Michael |
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