Figure 2. Short- and long-term effects of ultrasound exposure on P. interpunctella males orienting in a sex pheromone plume. Bars with different letters are statistically different (p < 0.05) according to χ² tests (% diving and % reaching source) and the Kruskal-Wallis nonparametric test followed by a Tukey-Kramer test (time spent on floor and orientation time). The intensities of the auditory cue used for the different groups are shown below the graphs. Between 28 and 34 males were tested per group.