Floating row covers

I have problems with insects attacking my veges. I have recently seen ads for Floating Row Covers, which, it is said, offer some protection against frost as well, which I could use in spring.
My question is: what effect do these covers have on air circulation? Another problem that I have right now is fungus and moulds encouraged by weeks of warm temperatures and drizzling rain. I do all that I can to promote air circulation to reduce fungal attack and it seems to me that Floating Row Covers might keep out the cabbage moths etc but reduce air circulation.
Any thought? Better still any experience?
David
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You might be better off with what is sold here in the UK as Enviromesh - fine plastic mesh (see www.agralan.co.uk). That will keep all but the smallest insects out while reducing air flow and light somewhat less than fleece. Obviously little or no frost protection though.
--
Max Wright


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