Emergence dates observed along an altitudinal transect in Mont Ventoux, France, for the pine processionary moth between 1970 and 1984

The dataset provides the date of procession in situ and the date of emergence in a common garden for caterpillars sampled in 6 sites located along an altitudinal gradient in Mont Ventoux, France, for the pine processionary moth Thaumetopoea pityocampa. The experimental protocol was followed yearly between 1970 and 1984. Due to prolonged diapause, some of the individuals emerged up to 4 years after field sampling.