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Biological and Physiological Changes in Spodoptera frugiperda Larvae Induced by Non-Consumptive Effects of the Predator Harmonia axyridis

Author

Listed:
  • Zeyun Fan

    (Engineering Research Center of Biological Control, Ministry of Education, South China Agricultural University, Guangzhou 510640, China
    School of Biology and Agriculture, Shaoguan University, Shaoguan 512005, China
    These authors contributed equally to this work.)

  • Weizhen Kong

    (Engineering Research Center of Biological Control, Ministry of Education, South China Agricultural University, Guangzhou 510640, China
    These authors contributed equally to this work.)

  • Xiaotong Ran

    (Engineering Research Center of Biological Control, Ministry of Education, South China Agricultural University, Guangzhou 510640, China)

  • Xiaolu Lv

    (Engineering Research Center of Biological Control, Ministry of Education, South China Agricultural University, Guangzhou 510640, China)

  • Chongjian Ma

    (School of Biology and Agriculture, Shaoguan University, Shaoguan 512005, China
    Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan 512005, China)

  • He Yan

    (Engineering Research Center of Biological Control, Ministry of Education, South China Agricultural University, Guangzhou 510640, China
    School of Biology and Agriculture, Shaoguan University, Shaoguan 512005, China)

Abstract

The effects of predatory natural enemies on their prey or hosts involve both consumption and non-consumptive effects. This study investigated the non-consumptive effects of the predator, Harmonia axyridis (Coleoptera: Coccinellidae) on 1st, 2nd and 3rd instar larvae of Spodoptera frugiperda . We exposed larvae of different instars to the predator and assessed various parameters using a combination of biological and biochemical methods. Exposure to the predator significantly affected the growth and development of the S. frugiperda caterpillars. Firstly, the developmental duration of S. frugiperda larvae in the 1st–3rd instars and the pupal stage were notably prolonged. Moreover, we observed significant effects on pupal mass, pupal abnormality rate and emergence rate. These non-consumptive effects were gradually weakened with an increase in the larval stage exposed to the predator. Antioxidant enzyme activities including catalase (CAT) peroxidase (POD) and superoxide dismutase (SOD) activity increased significantly. Additionally, organismal triglyceride, trehalose and glycogen content were significantly altered by non-consumptive effects, while protein content showed no significant change. Spodoptera frugiperda larvae increased the activity of antioxidant enzymes in response to potential predators to mitigate oxidative stress and reduce cellular and tissue damage. This resources redistribution towards survival may inhibit growth and development of the species and further exacerbate these non-consumptive effects. These findings highlight the importance of considering non-consumptive effects in pest-management strategies to optimize control measures in agricultural systems.

Suggested Citation

  • Zeyun Fan & Weizhen Kong & Xiaotong Ran & Xiaolu Lv & Chongjian Ma & He Yan, 2024. "Biological and Physiological Changes in Spodoptera frugiperda Larvae Induced by Non-Consumptive Effects of the Predator Harmonia axyridis," Agriculture, MDPI, vol. 14(9), pages 1-11, September.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:9:p:1566-:d:1474929
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    1. Lan Pang & Zhiguo Liu & Jiani Chen & Zhi Dong & Sicong Zhou & Qichao Zhang & Yueqi Lu & Yifeng Sheng & Xuexin Chen & Jianhua Huang, 2022. "Search performance and octopamine neuronal signaling mediate parasitoid induced changes in Drosophila oviposition behavior," Nature Communications, Nature, vol. 13(1), pages 1-18, December.
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