You might try parsnips for bait. I've had limited success with apples,potatoes,carrots,radishes,etc. But it seems to me that rats just can't pass up parsnips! Of course it could be that different baits work better or worse depending on the area you're trapping.? Parsnips grow wild around northern Illinois,the tops look just like carrot tops and the roots just look like white carrots.My Dad & I usually just buy them at any grocery store(they're bigger than wild ones and are easier to stick on a coni-trigger).One other tip...I like to take my hatchet& shave the edges off of them it makes them brighter&they smell stronger that way.Good Luck!!!