pepperments would be my first choice as a preditor for them, if you have alot of them then i would say a copperbanded butterfly but they have a rep of dieing so try the pepperments first,
alot of people just spit out joes joice, but for me i have to say put their preditor in there and if they find one they will eat it, its better then joes joice, but what ever you do, dont pull it off, ive done this befor and you end up with a small colony where it used to be, it just makes it worce, so get you some pepperments, and be done with it befor they get out of hand