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<p>Citrus is widely recognized as one of the most extensively cultivated fruit crops globally, particularly in tropical and subtropical regions valued for their economic significance and nutritional benefits. However, their productivity is increasingly threatened by pests and diseases, particularly the citrus nematode <i>Tylenchulus semipenetrans</i>, which causes significant damage to the root systems. This study investigates the nematicidal properties of silver nanoparticles synthesized through green method using <i>Parthenium hysterophorus</i> (Pr-AgNPs) against the second-stage juveniles (J<sub>2</sub>) of <i>T. semipenetrans</i>. The bioassay results demonstrate that Pr-AgNPs exhibited a maximum mortality of 100% at a concentration of 4&#xa0;ppm after 6&#xa0;h of treatment. Both concentration and exposure time had significant effects on mortality of nematodes. Additionally, Pr-AgNPs applied at varying concentration significantly increased the shoot length, root length, shoot weight, root weight and number of leaves of citrus plants. The production of chlorophyll and carotenoid significantly increased in citrus plants treated with 2&#xa0;ppm and 4&#xa0;ppm Pr-AgNPs as compared to the control (with nematodes without treatment). According to these findings, Pr-AgNPs are a promising alternative to conventional chemical nematicides, providing a sustainable solution for managing nematode infestations and improving citrus crop productivity.</p>

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Nematicidal activity of green synthesized silver nanoparticles using Parthenium hysterophorus and their impact on morphology and photosynthetic pigments of citrus plants

  • 期刊论文

  • 发表日期：

    2025年6月7日

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  • Jigmet Yangchan,
  • Dixit Sharma,
  • Mohd Ali,
  • Deepak Sharma,
  • Pankaj Thakur,
  • Dharminder Kumar,
  • Alka Rana,
  • Sunil Kumar

摘要

Citrus is widely recognized as one of the most extensively cultivated fruit crops globally, particularly in tropical and subtropical regions valued for their economic significance and nutritional benefits. However, their productivity is increasingly threatened by pests and diseases, particularly the citrus nematode Tylenchulus semipenetrans, which causes significant damage to the root systems. This study investigates the nematicidal properties of silver nanoparticles synthesized through green method using Parthenium hysterophorus (Pr-AgNPs) against the second-stage juveniles (J2) of T. semipenetrans. The bioassay results demonstrate that Pr-AgNPs exhibited a maximum mortality of 100% at a concentration of 4 ppm after 6 h of treatment. Both concentration and exposure time had significant effects on mortality of nematodes. Additionally, Pr-AgNPs applied at varying concentration significantly increased the shoot length, root length, shoot weight, root weight and number of leaves of citrus plants. The production of chlorophyll and carotenoid significantly increased in citrus plants treated with 2 ppm and 4 ppm Pr-AgNPs as compared to the control (with nematodes without treatment). According to these findings, Pr-AgNPs are a promising alternative to conventional chemical nematicides, providing a sustainable solution for managing nematode infestations and improving citrus crop productivity.