Walking distance of Colorado potato beetle is increased by light and pheromone.

<p>Distance walked by CPBs during stimulation with: the pheromone alone (pher), the pheromone versus two LED beams of yellow light perpendicular to the air stream (pher vs. 2 LED) and the pheromone plus one LED versus three opposite LED beams of yellow light: two perpendicular and two parallel to the air stream (pher with LED vs. 3 LED). <b>a.</b> Average walking distance during the three experimental periods (control, test and end-control) of females and males. Asterisks (*) over the horizontal lines indicate that distances were significantly different between the three stimulation treatments (one-way ANOVA, p<0.01). <b>b.</b> Walking distance index was calculated as the average walking distance during the test period minus the average walking distance during the first control period. Asterisks (*) indicate means that are significantly different from zero (Paired t-test, p<0.05). Different letters indicate significant pairwise differences across the different directions (Tukey-Kramer's post-hoc tests, p<0.05). The <i>black filled circles</i> mark the mean and <i>bars below and above</i> indicate the standard error.