Isn't pineapple kinda like a citrus, full of the same vitamins and minerals and stuff and plenty sweet? Citrus is supposed to make them breed better. Its worth a shot.
Yep, just don't let the orange slices stay in too long, I used to let them sit 48 hours, but now I'm thinking that may even be too long. They'll grow mold, and mold is deadly to roaches. Roaches, that will supposedly survive a nuclear holocaust.....