There is a school of thought that says carrot fly can only fly about 18" off the ground. People who reckon that are about as deranged as Rafa Beneathus when he says Liverscum are going to win the Premiership (sorry Mark the Ciderman!).
I've always had the odd mark but this year has been my worst ever. As you can probably see from my Sturton set above I had it quite badly, which obviously prevents me from showing at the highest level, which is annoying as otherwise I had some fair sized and decent shaped carrots this season. Part of my problem was that I didn't scatter some of my highly toxic (and probably banned!) insecticide around the crowns during the weeks when I was bravely fighting death due to swine flu!
But really I need to be making sure the fly have no way of getting to them by erecting some form of physical barrier and to this end I have bought some enviromesh to cover my long carrots/stump carrots and parsnips. I shall spend the Winter months wisely by mackling together some form of wooden cover to go around my drums and beds to which I will staple the mesh. Hopefully, I won't then have to rely on my insecticides so much. Organic shock horror! I must be going soft!
In the meantime I have given the sand a bloody good drenching with some cheap bleach in order to kill off any eggs. Phew.....he's back!
Now all I have to do is to get my seed and I've been promised some top notch stuff from an unbeatable Scottish grower who shall of course be nameless, but whose wife is absolutely hopeless at growing spuds!