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Chinese Journal of Biological Control ›› 2020, Vol. 36 ›› Issue (6): 891-898.DOI: 10.16409/j.cnki.2095-039x.2020.06.011

• RESEARCH REPORTS • Previous Articles    

Low Temperature Storage of Different Stages of Coccinella septempunctata

WANG Xiaoqiang1,2, CAO Xinyue3, ZHOU Yonghang1, CHEN Siwei1, MOU Fangsheng1, PU Deqiang2   

  1. 1. Industrial Crop Research Institute, Sichuan Academy of Agricultural Science, Chengdu 610300, China;
    2. Institute of Plant Protection, Sichuan Academy of Agricultural Science, Chengdu 610066, China;
    3. Tea Research Institute, Sichuan Academy of Agricultural Science, Chengdu 610066, China
  • Received:2019-03-08 Published:2021-01-09

Abstract: In order to explore the suitable condition of low temperature storage of Coccinella septempunctata, the hatching rate of egg, pupal abnormal rate and adult survival rate were measured under the combination of constant temperatures and storage duration and the combination of varying temperatures and storage duration. The results showed that eggs experienced constant low temperature storage or varying temperature hatched in three days, the hatching rate was 72.56% at constant temperature and 73.93% at varying temperature. The egg hatching rate exceeded 50% when the eggs were stored for less than 5 days at 8, 10 and 12 ℃ or for less than 10 days at 10 and 12 ℃. The adult emergence rate did not differ between the pupae stored for 3 d at 10 ℃ constant temperature and varying temperature and the pupae in the control. The adult abnormal rate was 100% in the pupae stored for 50 days at the constant temperatures of 2, 4, 6 and 8 ℃ while the adult abnormal rates were 100%, 50% and 100%, respectively, in the pupae stored for 20, 30 and 50 days at the varying temperature of 2 ℃. The adult survival rate was 60.46% at the constant temperature 8 ℃ for 60 d while the survival rate was 63.29% at the constant temperature 10 ℃ for 60 d. But the adults stored for 40 days all died at constant and varying temperature of 25 ℃. Therefore, the lifetimes of egg, pupa and adult stored at the condition of low temperatures can be extended, which provides support to the commercialized production and shelf-life of different stages of C. septempunctata.

Key words: Coccinella septempunctata, low temperature store, different stage, survival rate, shelf-life

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