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<p><i>Myzus persicae</i> (Sulzer) is a major agricultural pest affecting a broad range of crops, including <i>Brassica</i>, through direct feeding and the transmission of viruses, causing significant yield losses. Its management has primarily relied on chemical insecticides, resulting in the development of resistance, environmental concerns, and harm to non-target organisms. As a sustainable alternative, <i>Trichoderma</i> fungi, soil-inhabiting microbes with known biocontrol and plant growth-promoting properties, offer promise, though their plant-mediated effects on <i>M. persicae</i> remain underexplored. This study evaluated the influence of three <i>Trichoderma</i> strains (<i>T. harzianum</i> T22, <i>T. asperellum</i> T39, and <i>T. atroviride</i> HB20111) on the growth of <i>Brassica</i> and the performance and behavior of <i>M. persicae</i>. All treatments significantly enhanced plant growth and reduced aphid infestation. Notably, <i>T. harzianum</i> T22 had the most substantial suppressive effect on aphids, extending their pre-reproductive time, reducing fecundity, and decreasing longevity. All three <i>Trichoderma</i> strains deterred aphid settlement on host plants, and olfactometer assays demonstrated strong aphid repulsion in response to plant-emitted volatiles inoculated with the <i>Trichoderma</i> strains. Concurrently, all strains promoted significant plant growth. These findings suggest that <i>Trichoderma</i> inoculation can simultaneously enhance plant vigor and impair aphid performance via plant-mediated mechanisms, highlighting its potential as an environmentally friendly component in integrated pest management strategies.</p>

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Trichoderma inoculation alters the performance of Myzus persicae and enhances growth in Brassica rapa

  • 期刊论文

  • 发表日期：

    2025年12月17日

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  • Bilal Ahmad,
  • Aleena Alam,
  • Sohail Abbas,
  • Yuexuan Li,
  • Khalid Ali Khan,
  • Hamed A. Ghramh,
  • Jamin Ali,
  • Qiyun Li,
  • Rizhao Chen

摘要

Myzus persicae (Sulzer) is a major agricultural pest affecting a broad range of crops, including Brassica, through direct feeding and the transmission of viruses, causing significant yield losses. Its management has primarily relied on chemical insecticides, resulting in the development of resistance, environmental concerns, and harm to non-target organisms. As a sustainable alternative, Trichoderma fungi, soil-inhabiting microbes with known biocontrol and plant growth-promoting properties, offer promise, though their plant-mediated effects on M. persicae remain underexplored. This study evaluated the influence of three Trichoderma strains (T. harzianum T22, T. asperellum T39, and T. atroviride HB20111) on the growth of Brassica and the performance and behavior of M. persicae. All treatments significantly enhanced plant growth and reduced aphid infestation. Notably, T. harzianum T22 had the most substantial suppressive effect on aphids, extending their pre-reproductive time, reducing fecundity, and decreasing longevity. All three Trichoderma strains deterred aphid settlement on host plants, and olfactometer assays demonstrated strong aphid repulsion in response to plant-emitted volatiles inoculated with the Trichoderma strains. Concurrently, all strains promoted significant plant growth. These findings suggest that Trichoderma inoculation can simultaneously enhance plant vigor and impair aphid performance via plant-mediated mechanisms, highlighting its potential as an environmentally friendly component in integrated pest management strategies.