Acta Entomologica Sinica (2008) 51, 635-639

Wen-Xiang Li, Jian-Cheng Li, Zi-Yun Lu, Xiao-Xia Liu and Qing-Wen Zhang (2008)
[Critical photoperiod and sensitive stage of diapause induction in Microplitis mediator (Haliday) (Hymenoptera : Braconidae)]
Acta Entomologica Sinica 51 (6), 635-639
Abstract: Photoperiod response of diapause induction and the sensitive stage to photoperiod was investigated in the solitary endoparasitoid Microplitis mediator (Haliday) under 16°C and 18°C in the laboratory. The photoperiodic response curves in M. mediator showed that this endoparasitoid is a typical long-day species with a critical day length of 12.21 h at 16°C and 12.03 h at 18°C. The short day length of 10 h resulted in the, highest rate of diapause (98.0% at 16°C and 87.7% at 18°C) . The percentage of diapause was 0 when light length > 14 h or < 2 h. The sensitive stage to short light of 10 h at 16°C was the 2nd instar (Day 5 - 8), while the 2nd instar (Day 1 - 4, Day 9 - 12, and Day 13 - 16) and the 3rd instar were the less sensitive stages, and the egg stage and the 1 st instar were the insensitive stages to short light.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Xiao-Xia Liu, Jiancheng Li

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Microplitis mediator (parasitoid)