Hummingbird and Butterfly Gardening: Disease & Destructive Insect control in BF garden, 0 by Dogs_N_Petunias

Dogs_N_Petunias wrote:
The photo is poppy foliage. I have never grown them before and they are way too thick and it was hard to see the damage. The foliage is so fragile I didn't want to handle it much but now that it is really damaged, might as well reach in there and examine it closer.

The attached photo is what I found: It is tiny green worms but not so many that they are easy to find. Should I just cut off a lot of the foliage that is damaged or leave it and treat with what?