What is eating my potato flowers?

Anyone have any ideas? I have never ever seen potato flowers disappear like this before?

What a challenging year this is proving to be on the allotment! The rain continues - unrelenting. In the past week we have had thunder and lightning, hail stones and rain the like of which I have never seen before.
And the plants struggle with so much wet and the attacks from slugs and snails which are delighting in the conditions.
Some things have been good - strawberries were amazing albeit two weeks late in coming - but they are now over. The new potatoes are tasty and abundant and the perpetual spinach and swiss chard are keeping me in healthy greens!
The broad beans need another week probably to swell up but the crop doesn't look too bad, as long as the pigeons stay away. And the various brassicas, totally protected by netting from the unwelcome attention of birds and butterflies, are growing well.

As soon as the ground dries a little (if it ever does?) I shall tidy up the strawberry bed, digging out the oldest row and planting a new row from healthy looking runners, on a three year rotation plan. Then I shall put plenty of manure down between the rows, to feed them and also to keep weeds at bay  - then I can forget about them for another year.
I also intend this year to sow some broad beans where the potatoes are being cleared, hoping for an early spring harvest next year. I've never done this before but others do with seemingly good results. And I shall sow some more spinach and swiss chard to keep the supply to the kitchen going.
My main hope now is for a late summer burst of warmth and sunshine to give the poor courgettes, pumpkins, squash, etc a chance to grow and mature - otherwise I shall be missing out on beautiful squashes to store over winter for lovely roast vegetables.

4 jobs at the plot today

It's tempting to be lulled into a false sense of spring during this extraordinarily mild, indeed warm, week at least down in the South East of England. 17 degrees C it might be during the day, but there are still frosts at night sometimes, albeit not the really deep hoar frosts of mid winter. But they can still damage tender plants.
I spent nearly three hours at the allotment this morning. First thing, there was a thick fog and it was quite spooky down there. Later as the sun burnt through the fog it became quite warm by 11 ish.
What was I doing?
First I wanted to dig out all the strawberry plants that had spread far and wide across the plot during the autumn and early winter. They had to come out - I need the space.
So out they all came - and onto the compost heap.
Then I raked out all the dead leaves and runners - all brown and crackly now - from the two rows of strawberries I want to retain for fruiting this summer. These dead remains contain toxins that inhibit fruiting if they are left to rot around the strawberry plants. Mixed with all the other compost material, and plentiful farm manure, and left to rot over the summer, the resulting compost will benefit the rest of the plot no end.
Then I looked at the other compost bins and forked through them to turn the material a little in each one, to promote faster rotting down. In a couple of them I noticed the tell tale little runs of field mice - no harm there - they like the warmth and no doubt the vegetable peelings etc brought from home. Now rats I would be more worried about - but no trouble with those so far. The biggest problem with vermin at the allotments comes from wood pigeons. They will strip bare any sprouting broccoli, cabbage, and other brassicas unless the crop is completely covered with netting to keep them off. Some plotters have covered their whole plot with a fruit cage to tackle this problem.
So - to carry on - I then lugged umpteen barrow loads of manure from the communal pile and spread this all around the plots - except for that part where I plan to sow root vegetables this year. Fresh manure and root vegetables don't go well together, unless you want to see how grotesque you can grow your carrots!
All in all a good morning's work. The other day I bought some Broad Bean seeds and must sow them soon! Also the seed potatoes need chitting and planting - more about that later. Traditionally potatoes are planted on Good Friday - I don't off hand know why - but this year that will be 6th April so I have a few weeks in hand yet.
Good gardening!