Go to the predator section of this site:
http://www.huntmdown.com/deerCalls.html
They have a good selection of calls, dekes, and lures to bring those pesky yotes to withing shotgun range. Once you start actively hunting them they'll quickly disappear, butbe consistant, come to the property at random with blasting a yote or two as your goal before leaving. If they're denning on your land, or adjacent land, find the dens and destroy them if it's legal. Shoot any female yotes on sight without mercy.