Diapause Induction and Cold Storage of Exorista civilis Rondani (Diptera, Tachinidae)

doi:10.16409/j.cnki.2095-039x.2018.03.007

Abstract

Abstract: As one of the efficient control measures of meadow moth, Exorista civilis Rondani is the preponderant parasitic natural enemy of meadow moth. In order to improve the efficiency of the effect of natural enemy control, this study conducted the research on the effect of exogenous diapause induced condition and low temperature storage on E. civilis by setting cycles of temperature and illumination time indoors. The results showed that the ratio of diapause was 100% if the illumination time was less than 12 h at 17℃. With the increased temperature, the ratio of diapause decreased gradually, which reached to top at 29℃. The sexual ratio were various from 1.38 to 1.63 (P>0.05) after different temperature storage(4-25℃). The critical photoperiod was 12.53 h at 16℃ and 11.12 h at 18℃. The parasitoid accepted the signal for diapause at the larval stages, the ratio of diapause can reach to 94.3%. For the low temperature storage of overwintering chrysalis. Adult emergence rate was decreased with the extension of the storage period, which was 56.79% at 90 d. This study demonstrated that the temperature played a key role in the diapause of E. civilis. The low temperature treatment can induce the diapause of E. civilis efficiently at larval. The optimum low temperature storage period was 50 d at 4℃.

Key words: Loxostege sticticalis, Exorista civilis, diapause induction, photoperiod, temperature, low temperature storage

CLC Number:

S476.3

HAN Haibin, JIANG Shan, WANG Jianmei, LIU Aiping, HUANG Haiguang, XU Linbo. Diapause Induction and Cold Storage of Exorista civilis Rondani (Diptera, Tachinidae)[J]. journal1, 2018, 34(3): 342-347.

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