Biocontrol potential of the egg-larval parasitoid Chelonus bifoveolatus and egg parasitoid Telenomus remus against fall armyworm

IF 2.5 2区农林科学 Q1 AGRONOMY

Crop Protection Pub Date : 2025-09-05 DOI:10.1016/j.cropro.2025.107399

Mi Huang , Zhen Shen , Yong-Ming Chen , Talha Tariq , Liang-De Tang , Qing-Rong Bai , Jian Wei , Kelvin Kamfwa , Nicolas Desneux , Lian-Sheng Zang

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引用次数: 0

Abstract

The fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), is a highly destructive and migratory pest that causes substantial economic losses to staple and cash crops worldwide. This study evaluates the biological control potential of two key parasitoids of FAW: the egg parasitoid Telenomus remus Nixon (Hymenoptera: Scelionidae) and egg-larval parasitoid Chelonus bifoveolatus Szépligeti (Hymenoptera: Cheloninae), sourced from Africa and reared on the factitious host Spodoptera litura Fabricius (Lepidoptera: Noctuidae). Using the age-stage, two-sex life table theory, we compared their biological parameters to assess their efficacy against FAW. Chelonus bifoveolatus demonstrated superior longevity and reproductive capacity, with female adults living significantly longer (14.22 days) and having more oviposition days (13.35 days) compared to T. remus (11.55 days and 8.60 days, respectively). Remarkably, C. bifoveolatus exhibited a 12.1-fold higher average fecundity (2569.32 offspring) than T. remus (212.59 offspring), resulting in higher net reproduction rates (R₀) and net parasitizing rates (C₀). However, T. remus showed superior population parameters when targeting FAW eggs, including higher intrinsic rates of increase (r), finite rates of increase (λ), stable parasitizing rates (ѱ), and finite parasitizing rates (ω). Both species demonstrated immediate parasitization capability post-emergence (APOP = 0). Our findings reveal distinct advantages for each parasitoid. There is a higher fecundity of C. bifoveolatus and a faster population growth rate of T. remus. These complementary strengths suggest that integrating both parasitoids into FAW management strategies could significantly enhance biological control effectiveness. This approach is particularly promising for regions like Africa, where FAW poses severe threats to agricultural productivity and food security.

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卵-幼虫拟双曲螯虾和卵-拟端尾绦虫对秋粘虫的生物防治潜力

秋粘虫（FAW），又称夜蛾科（Spodoptera frugiperda）（鳞翅目：夜蛾科），是一种具有高度破坏性和迁徙性的害虫，在世界范围内对主要作物和经济作物造成重大经济损失。本研究评价了产自非洲，在人工寄主斜纹夜蛾（Spodoptera litura Fabricius）上饲养的两种主要寄生蜂：卵寄生蜂Telenomus remus Nixon（膜翅目：绢叶蜂科）和卵幼虫寄生蜂Chelonus bifoveolatus szacimpligeti（膜翅目：绢叶蜂科）的生物防治潜力。采用年龄阶段、两性生命表理论，比较其生物学参数，评价其抗一汽效果。双曲切绒螯蟹的寿命和繁殖能力显著高于黄颡鱼（11.55天和8.60天），雌成虫寿命（14.22天）和产卵天数（13.35天）均显著高于黄颡鱼（11.55天和8.60天）。结果表明，双叶蝉的平均繁殖力（2569.32个）是小夜蛾（212.59个）的12.1倍，净繁殖率（R0）和净寄生率（C0）较高。然而，在以FAW卵为目标时，褐毛小蠹蛾表现出较高的固有增长率(r)、有限增长率（λ）、稳定的寄生率（）和有限的寄生率（ω）等优越的种群参数。两种昆虫羽化后均表现出即时寄生能力（APOP = 0）。我们的发现揭示了每种寄生蜂的独特优势。双头弓形虫的繁殖力较高，而小夜蛾的种群增长速度较快。这些优势互补表明，将这两种寄生蜂整合到一虫管理策略中可以显著提高生物防治效果。这种方法尤其适用于非洲等地区，在这些地区，一汽对农业生产力和粮食安全构成严重威胁。

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来源期刊

Crop Protection 农林科学-农艺学

CiteScore

6.10

自引率

3.60%

发文量

200

审稿时长

29 days

期刊介绍： The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics: -Abiotic damage- Agronomic control methods- Assessment of pest and disease damage- Molecular methods for the detection and assessment of pests and diseases- Biological control- Biorational pesticides- Control of animal pests of world crops- Control of diseases of crop plants caused by microorganisms- Control of weeds and integrated management- Economic considerations- Effects of plant growth regulators- Environmental benefits of reduced pesticide use- Environmental effects of pesticides- Epidemiology of pests and diseases in relation to control- GM Crops, and genetic engineering applications- Importance and control of postharvest crop losses- Integrated control- Interrelationships and compatibility among different control strategies- Invasive species as they relate to implications for crop protection- Pesticide application methods- Pest management- Phytobiomes for pest and disease control- Resistance management- Sampling and monitoring schemes for diseases, nematodes, pests and weeds.