I'm not sure they're eggs...my wife has reported these to me, but I haven't seen them yet. Still, the fact some appear on the underside of leaves suggests to me that they're eggs rather than natural outgrowths (or whatever your vines get, jean).

Yes, I agree not moonseed, looks like wild grapes. But since we are talking about eating wild plants, I just wanted to mention the look alike so the OP and anyone reading this post (and we both know there are plenty of those!) would know that not everything that looks like a wild grape might be a wild grape. I personally have never seen moonseed. Grapes, on the other hand... I live in a part of the US known for grapes and wine. Wild grapes grow every place. They are a common "weed" for me to deal with in gardens. Old vines in forests here get as thick as young tree trunks - you could swing on the vines like Tarzan! I would think nothing of using anything that looked like wild grapes. But I'm sure not everyone has the same situation, hence the word of caution. :) FataMorgana

And lastly, this is actually on my Healthier vine. >> I think I wasn't watering them enough when it started warming up and only really started watering them every two days about a month ago so this could be an older leaf from that. But just putting this here in case it can help>

Not sure what your disease is, but you might not have pruned it enough. It doesn't look like it's getting much air in there, so grounds for breeding moisture born diseases. All the old clusters should have been removed and the canes cut back to 4 or 5 nodes a hand apart. New grapes will grow on the canes that come from the nodes after the vine goes dormant in winter. Inside each node is a new cane and a few clusters. It's a fantastic process. Don't be afraid to prune a vine hard. You tube has lots of videos on Pruning Grapevines for latices. Just do a search. It will be OK, but you will have a tangled mess if you don't prune aggressively. Prune too much and you won't have fruit! It's a balance. Good luck to you!