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<p>The southern root-knot nematode (RKN), <i>Meloidogyne incognita</i> is the major nematode problem in vegetable crops and causes huge amounts of losses in tropical and subtropical regions of the world. The study was carried out to synthesize, characterize, and test the bio-efficacy of chitosan-saponin nanoparticles (CS-SP NPs) against <i>M. incognita</i> on mortality, egg hatching, host finding, and management under growth chamber and screen house conditions on tomato. The NPs were synthesized by the ionic gelation method and characterized by DLS, FTIR, FE-SEM, TEM, XRD and, BET. The NPs exhibited a size of 331&#xa0;nm, 0.14 PDI, and 36.6 (+ ve) zeta potential. FTIR, FE-SEM, TEM, BET, and XRD confirmed functional groups, spherical shape, large surface area as compared to bulk material, and crystalline structure, respectively. The NPs showed 64.3% mortality with a 930&#xa0;ppm LC<sub>50</sub> value and 45.7% egg hatching inhibition after 24&#xa0;h. The synthesized NPs also reduced host finding and root parasitism of nematodes in tomato seedlings in the pluronic gel assay. The efficacy of NPs was further validated in a management experiment. Foliar spray of double dose (1860&#xa0;ppm) of NPs in both the growth chamber and screen house increased plant growth parameters (71.8% and 61.7% fresh shoot weight, respectively) and reduced nematode parameters (39.0% and 39.0% galls, respectively).</p>

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Evaluation of chitosan-saponin nanoparticles for the management of root-knot nematode, Meloidogyne incognita on tomato

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Lochan Sharma,
  • Prakash Banakar,
  • Anil Kumar,
  • Ajay Pal,
  • Sarita Sharma

摘要

The southern root-knot nematode (RKN), Meloidogyne incognita is the major nematode problem in vegetable crops and causes huge amounts of losses in tropical and subtropical regions of the world. The study was carried out to synthesize, characterize, and test the bio-efficacy of chitosan-saponin nanoparticles (CS-SP NPs) against M. incognita on mortality, egg hatching, host finding, and management under growth chamber and screen house conditions on tomato. The NPs were synthesized by the ionic gelation method and characterized by DLS, FTIR, FE-SEM, TEM, XRD and, BET. The NPs exhibited a size of 331 nm, 0.14 PDI, and 36.6 (+ ve) zeta potential. FTIR, FE-SEM, TEM, BET, and XRD confirmed functional groups, spherical shape, large surface area as compared to bulk material, and crystalline structure, respectively. The NPs showed 64.3% mortality with a 930 ppm LC50 value and 45.7% egg hatching inhibition after 24 h. The synthesized NPs also reduced host finding and root parasitism of nematodes in tomato seedlings in the pluronic gel assay. The efficacy of NPs was further validated in a management experiment. Foliar spray of double dose (1860 ppm) of NPs in both the growth chamber and screen house increased plant growth parameters (71.8% and 61.7% fresh shoot weight, respectively) and reduced nematode parameters (39.0% and 39.0% galls, respectively).