Here's the Crowder article I was looking for:

"Next he blew in
creosote smoke. On the vegetable
soaked paper, he
counted about 300 dead
mites. Almost crying tears of
joy, the Crowders recognized
they had a silver bullet to the
mite problem and that their
farm would survive. Since
this initial experiment, they
have used creosote bush on a
consistent basis to keep mites
at bay. They have also found
that juniper bark and leaves
when burned are an even
more effective solution on