Adult reproductive diapause in Emphasis Type="Ita

Authors: Yifan Zhai Qingcai Lin Jinping Zhang Feng Zhang Li Zheng Yi Yu

Publish Date: 2016/04/22

Volume: 89, Issue: 3, Pages: 679-688

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Abstract

Drosophila suzukii Diptera Drosophilidae is an emerging pest of soft fruits but in this species diapause has not been thoroughly explored We examined the effects of different temperatures and photoperiods on diapause induction and termination under laboratory conditions There was variation in the ovarian development and oviposition rate under different photoperiods at 10 ± 1 °C and the percentage of adults with immature ovaries was higher during the short photoperiod 8L16D than other photoperiods at 10 ± 1 °C Adults were most sensitive to photoperiod within 3 days of eclosion The optimal combination of photoperiod and temperature for diapause termination was a long photoperiod 16L8D at 25 ± 1 °C The supercooling point was significantly reduced in reproductive diapause females and trehalase pyruvate kinase sorbitol dehydrogenase hexokinase and phosphofructokinase enzyme activities were significantly reduced 3646 5785 3264 5468 and 2459  respectively glycogen and triglyceride levels were significantly increased 4217 and 12036  We conclude that D suzukii is typical of shortday diapause species within a certain photoperiod range This information might contribute to a more fundamental understanding of adult reproductive diapause for this important pestThis work was financially supported through a grant from the Shandong Provincial Natural Science Foundation China ZR2014CQ014 and the National Natural Science Foundation of China 31401803 The authors wish to thanks Jianlong Bi for the manuscript language revision

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