I have some lovely buds forming on my clematis plants, but notice that one or two buds have been attacked on one plant and have a neat hole about half a centimetre across burrowing into them. The buds haven’t died off, but will be deformed when they open up. I just wonder if anyone has an idea as to what the culprit might be? This particular clematis is growing in a container, and seems to be doing well overall.(Sorry I can’t remember it’s name, but it will be in flower next month and into June).