Garden Pests and Diseases: Anyone know what this is, it has declared war on my brugs!, 1 by FLSuncoast

FLSuncoast wrote:
The leaves of my brugs are being eaten wholesale here! It took alot of searching but I think I have found what is doing it. Someone told me not to kill them as they will turn into a pretty butterfly or moth. Well, I'm going to have to decide if I want brug or bugs! They are really tearing up my plants. Can anyone tell me what this is, what it will become and how to treat my plants for it? All my brugs are newly potted cuttings or babies I have grown from seed. I have over 70 brug babies right now and I really don't want to have to start over.

Thanks in advance!