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Scientia Silvae Sinicae ›› 2022, Vol. 58 ›› Issue (6): 88-94.doi: 10.11707/j.1001-7488.20220609

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Adaptation and Physiological Response of Hyphantria cunea (Lepidoptera: Arctiidae) to Populus alba × P. berolinensis Colonized by Glomus mosseae

Mingtao Tan1,Dun Jiang1,Shuai Wu1,Jie Zhang1,Lei Liu1,Jiaqi Zhao1,Zhaojun Meng1,Shanchun Yan1,2,*   

  1. 1. School of Forestry, Northeast Forestry University Key Laboratory of Sustainable Forest Ecosystem Management of Ministry of Education Harbin 150040
    2. Key Laboratory of Alien Forest Pest Monitoring and Control of Heilongjiang Province Harbin 150040
  • Received:2021-01-15 Online:2022-06-25 Published:2022-09-24
  • Contact: Shanchun Yan

Abstract:

Objective: This study aims to investigate the adaptation and physiological response of Hyphantria cunea (Lepidoptera: Arctiidae) to Populus alba × P. berolinensis colonized with arbuscular mycorrhizae fungi (AMF). Method: The cuttings of P. alba × P. berolinensis were inoculated with Glomus mosseae (GM), and when the GM infection rate reached the highest (90 days), the leaves were harvested and fed to the larvae of H. cunea. Result: After feeding on GM infected leaves of the popular, the body weight of 3rd-6th instar larvae was lower than that of the control, but the difference was not significant. The development duration of 2nd-5th instar larvae was significantly prolonged, and the relative growth rates of 3rd and 5th instar larvae were significantly decreased. There was no significant difference in food digestion rate of 5th instar larvae of H. cunea, but food conversion rate and utilization rate were inhibited. There was no significant difference in food consumption rate, conversion rate and utilization rate of 6th instar larvae. The activity of lipase in 5th instar larvae was significantly increased, the activity of glutathione S-transferase (GSTs) was inhibited, and the activities of protease, amylase and carboxylesterase (CarE) were not significantly different from those in the control group. The activities of lipase, protease, amylase, GSTs and CarE of 6th instar larvae were significantly higher than those of the control. Conclusion: The P. alba × P. berolinensis inoculated with GM has a certain inhibitory effect on the growth, development and food utilization of H. cunea in a short period of time, and H. cunea can break through this inhibition by increasing the activities of digestive enzymes and detoxification enzymes, and maintain normal growth and development. The results can lay a theoretical foundation for the future study of AMF-forest-herbivorous insect system.

Key words: Hyphantria cunea, arbuscular mycorrhizae fungi (AMF), Glomus mosseae, growth and development, food utilization, digestive enzyme, detoxification enzyme

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