Milky Spore is a natural substance that supposedly only gets better with time. It helps to eradicate the Japanese beetle grubs that voles like. If you get rid of the food source, the voles may move on. Being JB are not native, I don't feel bad about their demise! The Milky spore is quite expensive, but it's once and done. I took the bags of powder out with a tsp. and, in a grid pattern, I walked the property and dropped a tsp. full every four feet. So far, it has seemed to make a difference. I live in zone 5 Vermont.
crawgarden said: My side yard is mostly Fritillaria meleagris a little over 400, the mole started going in to that area, stopped completely, could have been a coincidence. Now if I could figure out how to stop the voles!
