Memory retention after withdrawl of scented sucrose solution.

<p>Bees were fed until 14 days of age with an unscented solution, then fed for 24 h with a scented sucrose solution (LIO, 15% w/w)and on the 15th day once again fed with the unscented solution. The figure shows the percentage of bees that extended their proboscis on the first presentation of the odor for the solution odor (linalool, LIO, black bars), a novel test odor (phenylacetaldehyde, PHE, gray bars), or both (dark gray bars). The asterisks indicate statistical differences in a G-test (** p<0.01, for details see the text). The number of observation is shown in parentheses.