more trouble

I was taking a peek at my large raised bed while I worked around the yard today and heard myself wondering -- why does it look like a strobe light in the garden?  And lo and behold I found a perfectly white butterfly flitting beneath a broad cabbage leaf.  All I could think was cabbage worms!

Really, how do people grow vegetables without insects?

I shooed the butterfly away and replaced the remay -- and cursed myself for taking it off in the first place.

Please, please, please let me raise some edible food.