Fig. 2
From: Phenology-dependent cold exposure and thermal performance of Ostrinia nubilalis ecotypes
Seasonal temperature and life-history timing of univoltine and bivoltine populations. Estimated seasonal timing of (a) direct developing pupae and (b) first through fourth instar larvae of bivoltine E (blue) and univoltine Z (red) populations for years 1999–2010. c Minimum daily temperature at Geneva Research Farm, NY for years 1999–2010, with each year represented by a unique color