Association between the width of the eggs and diapause incidence. Data come from 2019 and the Reichstett field area. Eggs are batched according to the calendar week of collection. For each week, average diapause incidence is used. Width of eggs is shown as dots for median values and lines as interquartile ranges. Three groups are defined depending on their week of collection: group ND from weeks 26 to 34 (in blue), group M from 35 to 37 (in green) and group D from 38 to 43 (in red). An overlap in width between group ND and D is highlighted in pale lavender.