The work of beekeeper and MSBA member Bob Noel of Cumberland, Maryland, was
the subject of the cited newspaper article.  He wrote a letter to the editor
this year in either ABJ or Gleanings describing his experiments with the
various essential oils.   Sorry, but I don't recall which or when.  He also
gave a very good presentation to the Maryland State Beekeepers Assoc winter
meeting in January this year.  If anyone is interested to invite him to speak
at your meeting, I can ask if he would be willing and I can put you in
contact.
 
Regards,
David Morris, President
Maryland State Beekeepers Assoc
Laurel, MD