I investigated the polytunnel this morning. The sun was shining (sort of) and inside it was warm and springlike. There was a compete absence of any of the brassicas. Whatever it was that took a shine to the calabrese, kale and spring cabbages ate the whole lot.
A big gap where once there was cabbage.
But the whatever it was left the lettuce, rocket, chards, spinach, land cress and mustard alone. All were hot and thirsty so I hoed a little, watered a little, picked my first harvest of salad for 2012 and left the doors open to give the tunnel a good airing.