I didn't know I had them, but overnight, they ravaged my tomatillo plant. Fortunately, my tomato, pepper and ground cherry plants are as yet unscathed. I know you can pick them off, but since they do enough damage overnight to destroy a plant, I don't want to risk them spreading.
What is the best course of action? Should I dig up the tomatillo plant to prevent spreading? Is there something I can spray?