I cant get rid of ticks in my yard. I have a large field behind me that does not get cut ( i trim around to keep insects and weeds at bay), I have sprayed SEVIN once a week for 4 weeks, and keep my grass low. What will keep them from invading my yard???

Try Malathion. It works for me and is not quite as people harmful as SEVIN (I hear)
....I think I spelled it right......