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I have just been up the lottie and picked a couple of cabbages.  When I picked them a lot of little white flies flew out.  Does anyone know wheat they could be.  The cabbages seem ok and not eaten ??? ??? ???

" White fly"... not a real pest but irritating. Growing marigolds (tagates) with them or African/ French types (not English Pot) can help...  :)

Thanks Saddad.  I didnt think it was root fly as the roots and stems were all ok.

They are sap suckers that live on the underside of the leaves of all brassicas...  :)