Abstract
Field experiments conducted between 1991 and 1993 demonstrated that treating colonies of honey bees, Apis mellifera L., continuously with vegetable oil depressed populations of tracheal mites Acarapis woodi (Rennie). In 1992-1993, continuous exposure to oil patties, with or without the antibiotic Terramycin, produced significant control of mites. Five of 11 untreated (control) colonies perished. None of the oil-pattytreated colonies died, and only two of 10 colonies treated with Terramycin patties expired. Oil patties were made from a combination of solid vegetable oil (shortening) and white sugar, with or without the addition of the antibiotic. Two oil patty treatments during the summer of 1991 failed to prevent mite population increases in bees by that fall.
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