Welcome to Chinese Journal of Biological Control,Today is

Chinese Journal of Biological Control ›› 2021, Vol. 37 ›› Issue (6): 1179-1188.DOI: 10.16409/j.cnki.2095-039x.2021.05.013

• TECHNICAL REVIEWS • Previous Articles    

Adaptation and Physiological Response of Dastarcus helophoroides (Fairmaire) to High Temperature Stress

ZHOU Youjun1, LU Ciding1, SHEN Haiyan1, LIANG Yun1, CHEN Zhenhong1, ZHONG Jinghui2, TAN Jiajin3, WANG Xiaoyi4, LIANG Guanghong1   

  1. 1. Forestry College, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    2. Quanzhou Station of Forestry Pest Control and Quarantine, Quanzhou 362400, China;
    3. College of Forestry, Nanjing Forestry University, Nanjing 210037, China;
    4. Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
  • Received:2021-03-10 Published:2021-12-15

Abstract: The release of commercial natural enemy insects in different regions of China may be affected and restricted by extreme temperature. Dastarcus helophoroides (Fairmaire) is one of the important natural enemies of stem borers, such as Monochamus alternatus Hope. It has a good application prospect, but its population density is low in southern China, and its control effect is limited. In this study, the commercial adult of the D. helophoroides was taken as the research object, and the normal temperature of 25℃ was taken as the control. The effects of different high temperature stress conditions (33℃, 36℃, 39℃, 42℃ and 45℃) on the longevity, reproduction, nutrients and antioxidant activities of commercial adults of D. helophoroides were studied in order to comprehensively evaluate the adaptability of D. helophoroides to high temperature stress. To provide a scientific basis for the study of the optimal release time, the evaluation of control effect and the stability of the population of D. helophoroides in Pine forest in southern China. The results showed that high temperature stress (33 ℃—45 ℃) had a significant effect on the longevity of the adults, and it shortened significantly with the increase of temperature. The high temperature area can be divided into lethal high temperature area (42 ℃—45 ℃), sub lethal high temperature area (39 ℃—42 ℃) and high temperature area (33 ℃—39 ℃). The results showed that high temperature stress induced strong stress resistance metabolism, consumed a lot of nutrients, and significantly changed the contents of total sugar, trehalose and triglyceride. At the same time, the activities of SOD and CAT increased significantly and the activity of POD decreased significantly, which was related to the scavenging of free radicals. It is suggested that the release time should be chosen to avoid the potential effects of high temperature. In order to enhance the ability of high temperature tolerance and pest control, the high suitable temperature zone (33 ℃—39 ℃) should be used for domestication.

Key words: Dastarcus helophoroides, high temperature stress, mortality, nutrient substances, antioxidant enzymes

CLC Number: