Temperature and Photoperiod Response in Diapause Induction of Cotesia tibialis (Hymenoptera: Braconidae)

doi:10.16409/j.cnki.2095-039x.2026.01.008

Abstract

Abstract: The temperature and photoperiod response of diapause induction in Cotesia tibialis was systematically investigated with the photoperiodic response method and the method of gradient variable temperatures. The results showed that C. tibialis enters diapause in the winter as a prepupa. Short day length and low temperature are the two key factors that induced diapause in C. tibialis, and more C. tibialis were induced into diapause under optimal combinations of these two factors. Under a short-day length of 8L:16D, diapause was induced successfully at temperatures below 14 ℃. Under a long-day length of 14L:10D, diapause was not induced at the temperature range of 14 ℃ to 30 ℃. At 12 ℃, up to 86.54% of C. tibialis entered diapause under a short-day length 8L:16D, and a decrease in diapause rate was observed under both photoperiods of 10L:14D and 12L:12D. At 26 ℃, the diapause rate was 0 under different day lengths, and the effect of photoperiod was not significant. Thus the combination of low temperature and short photoperiod can significantly induce diapause in C. tibialis.

Key words: Cotesia tibialis, diapause, photoperiod, temperature

CLC Number:

S476.3

ZHANG Hang, BAI Weiwei, LI Weipeng, YANG Anpei, LI Guangkuo. Temperature and Photoperiod Response in Diapause Induction of Cotesia tibialis (Hymenoptera: Braconidae)[J]. Chinese Journal of Biological Control, 2026, 42(1): 158-163.

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