I have moles and/ or gophers in my backyard and over many yrs they have totally destroyed a nice level lawn. I am a senior and concerned about falling with all the lumpy- bumps hidden throughout the yard. Can I spray anything to get rid of the moles and gophers? I have tried gopher gasers, cups of numerous things poured in the hole. Any ideas other than traps which I do not think I can set up. Thank you for the advise,