I don't think mealy bugs are specific. And I don't think they are all that picky when it comes to what they eat. Sure, they have favorites, just like people have favorite things to eat, but when you're hungry, a hamburger fills you up as well as steak! My mealy bug problems so far have been limited to coleus, mandevilla and hibiscus, but I'm thinking they can go to any plant. In other threads I've seen pics of them on nearly all kinds of plants, including jade plants, which are usually free of pests.