Looking at the 2nd photo again, I think Andy may be right and that bud is an allium head forming.
Looks like a lily of some kind to me.
Cleared a small neglected bed to make room for some of the plants which are ready to go out but I don't have room for. Found about 15 madonna lily bulbs in it which have been there for a few years but never really done much, so have bunged them in some pots of really good compost. I have two borders which need rejuvenating so plenty of work lined up for the foreseeable!
Are you feeding it Roy? Another potential reason is if you let grass or other plants grow right up to the trunk - it's best to leave a circle of about a metre diameter clear around the base of the tree so the tree isn't competing for nutrients. Finally, are there any other apple trees nearby in blossom at the same time? Cross-pollination really helps cropping.
Pull one and have a look - if it looks like these images:
it's white rot and I would pull them all. If the cloves look normal it is likely a virus and those don't survive in the soil as they need living plants to survive, so there would be no need to treat the soil.
Nettle 'tea' is best for those leafy things which prefer a feed high in nitrates and comfrey is better for fruit and flowers which prefer a more balanced mix of nutrients.
Garlic is prone to viral diseases which is why it's best to buy cloves from garden suppliers rather than supermarkets when growing them. I agree, the problem should not affect the other alliums in the bed.
Logan, you've mentioned that problem several times on various threads. What device and browser are you using?
I've started using FireFox for this forum - the pics open in a separate window and it seems much more consistent than IE or Chrome. There are so many settings on these things though and several of them can affect images!
Vic, it look like there may be 2 plants there. The one circled in red below may be an elderberry tree seedling. The other looks like something from the cucumber family.
Can you enlarge it now Dove?