HDAC inhibitor treatment does not affect sucrose sensitivity or locomotor activity. Sucrose sensitivity (A): treatment with an HDAC inhibitor does not significantly alter sucrose sensitivity indices at age 6, 7, 8 or 9 d (p > 0.05). 10 mM C8 was used to test 6, 8 and 9 d bees, 10 mM PB was used to test 7 d bees. Mean sucrose sensitivity indices are shown. From left to right, n HDAC inhibitor = 52, 36, 63 and 40; n vehicle = 56, 56, 60 and 51. Locomotor activity (B, C): bees treated with HDAC inhibitor show no significant change in movement rate (B) or grooming behaviour (C) relative to controls. By experiment, PB: n HDAC inhibitor = 28; n vehicle = 28; C8: n HDAC inhibitor = 37; n vehicle = 38. PB bees were 7 d old, C8 bees were 8 d old. Box plots show medians, quartiles and ranges, with circles and asterisks indicating moderately and strongly outlying data points. No statistically significant effects of PB or C8 treatment were detected on average number of line crossings per minute (p = 0.719, 0.254 respectively) or average number of head cleanings per minute (p = 0.718, 0.197 respectively).