Effect of Chilling Temperature on Survival and Post-Diapause Development of Korean Population of Lymantria dispar asiatica (Lepidoptera: Erebidae) Eggs

One of the subspecies Eurasian spongy moth, Lymantria dispar asiatica, is a destructive forest pest in native regions and also an important quarantine non-native regions. Its polyphagous nature, together with occasional outbreaks, may seriously threaten ecosystems result costly management programs. In this study, we examined effect chilling temperatures (−12, −6, 0, 6, 12 °C) during diapause phase on survival post-diapause development L. d. asiatica eggs, collected before winter, order to characterize their thermal response. The eggs were exposed treatment for 100 days, followed by 25 °C incubation determine time. hatched all treatments, indicating that conditions could partly or sufficiently satisfy requirement enter development. However, exposure significantly affected both times overwintering given temperature range. rates declined at −12 °C, accelerated as increased. This information offer clues assessment outbreak potential possibility range expansion through consideration winter favor egg hatching subsequent