Garden Pests and Diseases: Any idea what is eating my sweet potato vine? , 1 by MTnic

MTnic wrote:
Not only are there holes throughout the leaves, the new leaves look strange. Sort of rusty and crinkled and deformed. I suspected slugs initially because of the shape of the holes, but I've never seen a slug or heard of one in these parts. None of the gardeners I know have ever seen one here. The plant is near a rose bush and I see black ants crawling on it periodically, I'm pretty sure they are ants and not sweet potato weevils, but I could be wrong, I suppose. Any help would be much appreciated!