If your talking about the fly trap treasure cards, it should work. Try putting your plants in a circle and close to each other. I think if it says all plants it for all plants, otherwise it just for the one plant. The normal gusty winds spell I notice kills pests from both plants if I put them next to each other.
Hmmm... Can't imagine why it would want to eat Stink Bugs though. Might give him indigestion Good idea, I'm just being goofy. It wouldn't me very fun if it got rid of all the pests though. If so, people would just buy them, forget about the pests, and train their pets Maybe if it just ate the rank one pests in it's near area. That would be cool?