Worms.....? I wonder if it is some kind of poison? A farmer told me the only way he got rid of the gophers was using an industrial strengh "gas pellet". He said they aren't available to the public, and you have to wear personal protection gear to handle it...! I can't imagine that being good for the soil or other life forms. I guess I will just cage off my valuable plants and hope the gophers move to the outskirts of our acreage