Effects of Cold Acclimation on Cold Storage of Orius similis

doi:10.16409/j.cnki.2095-039x.2019.01.006

Abstract

Abstract: To evaluate the effect of cold acclimation on cold storage of Orius similis, the longevity, survival rate and lethal time (Lt₅₀) of female adults of O. similis were measured for the insects treated at 4℃, 6℃ and 10℃, with or without previous cold acclimation for 7 days at 15℃. The cold-stored O. similis female adults lived significantly longer than the control adults reared at 25℃, irrespective of cold acclimation. Cold acclimation had no effect on the longevity of the female adults stored at 10℃, but extended the longevity of the adults stored at 4℃ and 6℃ by 80.7% and 83.7%, respectively. The survival rate of the female adults decreased with extension of cold storage time, but the acclimated O. similis had relatively high survival rate compared to those without acclimation. In cold acclimated female adults stored at 4℃, 6℃ and 10℃, the LT₅₀ increased by 30.0%, 57.8% and 40.4%, respectively, in comparison with those without acclimation. The result indicates that the longevity of O. similis female adults is responsive to cold acclimation. Cold acclimation is benefical to the cold storage of O. similis, especially at 6℃.

Key words: Orius similis, cold acclimation, longevity, survival rate, LT₅₀

CLC Number:

S433

ZENG Guang, ZHI Junrui, ZHANG Changrong, YE Mao, ZHANG Tao. Effects of Cold Acclimation on Cold Storage of Orius similis[J]. journal1, 2019, 35(1): 20-23.

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