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<p>Nanomaterials such as graphene oxide (GO) are promising for agricultural pest management, yet their multigenerational effects remain underexplored. We evaluated the consequences of continuous GO exposure in the green peach aphid, <i>Myzus persicae</i> (Sulzer) (Hemiptera: Aphididae), using age-stage, two-sex life-table analyses under laboratory conditions. Newly emerged first-instar nymphs were reared for ten generations (F<sub>1</sub>–F<sub>10</sub>) on tobacco leaf discs treated by the leaf-dip method with GO solutions (0.125, 0.5, 2.0&#xa0;mg/mL). In acute-toxicity assays, 24-h mortality remained &lt; 10% at ≤ 32 mg/mL; by 48 h, mortality increased dose-dependently to ~ 89% at 32&#xa0;mg/mL, yielding a 48-h median lethal concentration (LC<sub>50</sub>) of 12.3&#xa0;mg/mL (LC<sub>90</sub>, 65.8&#xa0;mg/mL). Sublethal GO exposure significantly altered development and reproduction. At 2.0&#xa0;mg/mL, pre-adult duration increased from 4.99 to 6.20&#xa0;days and fecundity declined by 16.5%. The intrinsic rate of increase (<i>r</i>) was significantly reduced in F<sub>1</sub> at all concentrations, from 0.4565 to 0.3513 d<sup>−1</sup> at 2.0&#xa0;mg/mL. Under multigenerational exposure to 0.5&#xa0;mg/mL, pre-adult development remained prolonged, fecundity decreased by up to 24% (F<sub>5</sub>), and <i>r</i> reached a minimum in F<sub>5</sub> (0.3368 d<sup>−1</sup>) with partial recovery by F<sub>10</sub> (0.3774 d<sup>−1</sup>). These results show that GO imposes sustained, generation—dependent suppression of <i>M. Persicae</i> performance alongside signs of acclimation. Given its modest acute toxicity yet consistent demographic impacts, GO is best positioned as a delivery platform or adjuvant for bioactive compounds in sustainable pest-management strategies.</p>

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Effects of a multigenerational exposure to graphene oxide on the growth, development, and reproduction of green peach aphids, Myzus persicae

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • Jie Fan,
  • Syed Husne Mobarak,
  • Mao-Fa Yang,
  • Tong-Xian Liu,
  • Chao-Xing Hu

摘要

Nanomaterials such as graphene oxide (GO) are promising for agricultural pest management, yet their multigenerational effects remain underexplored. We evaluated the consequences of continuous GO exposure in the green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae), using age-stage, two-sex life-table analyses under laboratory conditions. Newly emerged first-instar nymphs were reared for ten generations (F1–F10) on tobacco leaf discs treated by the leaf-dip method with GO solutions (0.125, 0.5, 2.0 mg/mL). In acute-toxicity assays, 24-h mortality remained < 10% at ≤ 32 mg/mL; by 48 h, mortality increased dose-dependently to ~ 89% at 32 mg/mL, yielding a 48-h median lethal concentration (LC50) of 12.3 mg/mL (LC90, 65.8 mg/mL). Sublethal GO exposure significantly altered development and reproduction. At 2.0 mg/mL, pre-adult duration increased from 4.99 to 6.20 days and fecundity declined by 16.5%. The intrinsic rate of increase (r) was significantly reduced in F1 at all concentrations, from 0.4565 to 0.3513 d−1 at 2.0 mg/mL. Under multigenerational exposure to 0.5 mg/mL, pre-adult development remained prolonged, fecundity decreased by up to 24% (F5), and r reached a minimum in F5 (0.3368 d−1) with partial recovery by F10 (0.3774 d−1). These results show that GO imposes sustained, generation—dependent suppression of M. Persicae performance alongside signs of acclimation. Given its modest acute toxicity yet consistent demographic impacts, GO is best positioned as a delivery platform or adjuvant for bioactive compounds in sustainable pest-management strategies.