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From http://pbesa.ucdavis.edu/abs.pdf
SUCROSE OCTANOATE AS AN ALTERNATIVE COMPOUND FOR CONTROL OF VARROA
DESTRUCTOR ON
HONEY BEES
M. A. Gardner, J. P. Strange, and W. S. Sheppard
Department of Entomology, Washington State University, Food Science and
Human Nutrition Building 252, Pullman,
WA 99164-6382, USA
The parasitic mite Varroa destructor (Anderson & Trueman) is the greatest
problem facing managed honey bee (Apis
mellifera) colonies in the United States. Currently only two treatments are
approved for Varroa destructor control,
fluvalinate, a synthetic pyrethroid, and coumaphos, an organophosphate.
Concerns about resistance development and
pesticide residues in hive products highlight the need to consider
alternative classes of Varroa mite control agents. We
report here the results of experiments testing sucrose octanoate as an
alternative control of Varroa destructor. Sucrose
octanoate is a sugar ester, a class of compounds that have previously been
used for greenhouse whitefly and pear psylla
control. Sucrose octanoate was applied to each frame in a honey bee colony
with a pressure sprayer at a concentration of
0.12 percent active ingredient in water. The chemical provided greater than
80 percent control when initial mite levels
were less than 2000 per colony, and greater than 50 percent control when
colony mite levels were greater than 2000. This
was significantly higher than the control treatment of water. Several
applications are necessary to obtain adequate control
of large infestations. We suggest that sucrose octanoate is a safe and
effective compound for Varroa mite control and are
currently researching a more efficient means of application.
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