Researchers from Cornell University installed and monitored dozens of “four-poster” feeding stations, which lure deer to a bin baited with corn and rigged with rollers soaked with a tick-killing pesticide, permethrin. When a deer rubs against the rollers, ticks die by the thousands. One station can treat all the deer in about 100 acres.
http://www.nytimes.com/2012/05/17/opinion/ticks-to-the-slaug...
Summary:
Researchers from Cornell University installed and monitored dozens of “four-poster” feeding stations, which lure deer to a bin baited with corn and rigged with rollers soaked with a tick-killing pesticide, permethrin. When a deer rubs against the rollers, ticks die by the thousands. One station can treat all the deer in about 100 acres.