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NHB-sponored mite control research project completedA paper titled "Beta-Cyclodextrins as Carriers of Monoterpenes into the Hemolymph of the Honey Bee (Apis mellifera) for Integrated Pest Management" has been published in the Journal of Agricultural and Food Chemistry. The National Honey Board provided funding for the project through its research program. Blaise LeBlanc, PhD., conducted the project at the Carl Hayden Bee Research Center, U.S. Department of Agriculture Agricultural Research Service, in Tucson, Ariz. The study focused on developing a new delivery method for treatment of Varroa mites. The most noted acaricides against Varroa mites are tau- fluvaninate and coumaphos, but the mites are showing resistance to these acaricides. Since these insecticides are used in the proximity of honey, it is desirable to use natural alternatives. Monoterpenoids such as thymol and carvacrol, that are constituents of oil of thyme and oil of origanum, show promise as acaricides against the Varroa mite, but the delivery of these compounds remains a challenge due to the low water solubility and uncontrolled release into the colony. Combining these monoterpenoids with Beta-Cyclodextrins increases the water solubility of the compounds and enables the treatment to be administered via sucrose syrup. High (mM) levels of thymol and carvacrol were detected in bee tissues without any imposed toxicity to the bees, in an effort to deter Varroa mites from feeding on honey bee hemolymph. The abstract of this paper can be found online at http://emm.nhb.org:8080/r.html?uid=1.s.66d.3r.5rqpeoc7u6 NHB conducts research, marketing and promotion programs to help maintain and expand domestic and foreign markets for honey. These programs are funded by an assessment of one cent per pound on domestic and imported honey. 9/8/08 Date: 9/3/08 Advertisement
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