Adrian Wenner wrote:
        By a fortunate circumstance, pure sugar solution (i.e., sucrose or
table sugar) has no odor, with its vapor pressure of zero.  However, one
must take extreme care in preparation of experimental sugar solution,
because any contaminant (in the solution or nearby) can provide an odor cue
for searching bees.  One must also take extreme care to not inadvertently
furnish any marking odor at experimental feeding stations in the field.

Question:  Are honeybees (or other bees/insects for that matter) capable of
leaving a scent of their own to mark the location of a food source?

        Mike Swintosky