Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (3): 624-629.DOI: 10.3969/j.issn.1004-1524.2023.03.15

• Plant Protection • Previous Articles     Next Articles

Effects of different temperature on supercoolings point and freezing point of Picromerus lewisi Scott

LENG Meng1,2(), YAO Dihui1, LONG Kai1, ZHAO Haiyan1,3,*(), YANG Maofa1,3, YU Xiaofei1,3   

  1. 1. Guizhou Provincial Key Laboratory of Tobacco Quality Research, College of Tobacco Science, Guizhou University, Guiyang 550025, China
    2. Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
    3. Institute of Entomology, Guizhou University, Guiyang 550025, China
  • Received:2022-07-24 Online:2023-03-25 Published:2023-04-07

Abstract:

In order to clarify the changes of supercooling point and freezing point of Picromerus lewisi Scott under different temperature, female adult, male adult and third instar of P. lewisi Scott were treated at different temperatures(30, 35, 40 ℃) for 1 h, and the changes of supercooling point and freezing point were measured. It was shown that high temperature changed the supercooling point and freezing point of P. lewisi Scott. After treatments under 30, 35, 40 ℃, the supercooling point and freezing point of the third instar of P. lewisi Scott increased significantly (P<0.05) as compared with those under control (25 ℃). The supercooling point of male and female P. lewisi Scott treated at 30 ℃ did not show significant difference with those under control, yet the supercooling point and freezing point of male and female P. lewisi Scott treated at 35 ℃ and 40 ℃ were significantly higher than those under control. The supercooling point and freezing point of male adult were the lowest under different treatments amomg all the tested insect states of P. lewisi Scott. Thus, high temperature could elevate the supercooling point and freezing point of P. lewisi Scott, reduce the temperature adaptation range. Among all the tested insect state of P. lewisi Scott, male adult could better adapt to the temperature change.

Key words: Picromerus lewisi Scott, supercooling point, freezing point, temperature

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