Abstract: To understand the effects of temperature and photoperiod on diapause termination and post-diapause development of the overwintering egg of Apolygus lucorum Meyer-Dür, the hatch rate and hatch time of the overwintering egg of A. lucorum at different temperature and different photoperiod were systematically investigated. The results showed that the overwintering eggs of A. lucorum were all diapause eggs, and their diapause termination could be influenced by low temperature and photoperiod. Low temperature (2℃) affected the diapause termination. The time of diapause termination was shortened with the increment of treatment time of low temperature in the 0 to 65 d treatments, and the T₅₀ values of that without low temperature treatment and the treatment for 65 d by low temperature was 68.5 d and 12.5 d, respectively. The diapause termination of overwintering eggs was completed after 65 d of low temperature treatment. The hatch rate of the overwintering eggs increased with the treatment time of low temperature in the 0 to 40 d treatment. The hatch rate of overwintering eggs without low temperature treatment was 68.65% at 25℃ and full light, and 99.46% with low temperature treatment for 40 d. The developmental duration of post-diapause reduced with the increasing of temperature and photoperiod at 20-26℃. The results suggest that low temperature could increase the diapause termination rate of overwintering eggs but is not the necessary condition for diapause termination. Effects of low temperature and nature temperature on the diapause termination were similar. High temperature and long photoperiod may promote the diapause termination of overwintering eggs and reduce their developmental duration.

Key words: Apolygus lucorum, diapause, overwintering egg, low temperature, photoperiod, diapause termination, developmental duration