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<p>Root-knot nematode (RKN) disease seriously affects crop growth and reduces crop yield, causing huge economic losses worldwide. <i>Paenibacillus polymyxa</i> KM2501-1 is a promising microbial agent with strong nematicidal activity against <i>Meloidogyne incognita in vitro</i> and good control efficiency on RKN diseases in the field. Baseline information about the effect of <i>P. polymyxa</i> KM2501-1 on the egg hatching, motility, and reproduction of <i>M. incognita</i> remains limited. In this study, the multiple inhibitory effects of <i>P. polymyxa</i> KM2501-1 on <i>M. incognita</i> were systematically investigated. After treatment with the culture filtrate (CF) of <i>P. polymyxa</i> KM2501-1, the egg hatching rate of <i>M. incognita</i> decreased by 93.49%, the frequencies of head thrash and body bend decreased by up to 99.17% and 99.20%, respectively. In pot experiments, <i>P. polymyxa</i> KM2501-1 exhibited better control efficiency on RKNs than the commercial nematicide avermectin, with reductions in root galls and population density of <i>M. incognita</i> in the tomato root and rhizosphere soil by 67.18%, 68.17%, and 47.77%, respectively. Additionally, the CF of <i>P. polymyxa</i> KM2501-1 significantly promoted the growth of tomato plants and reduced the egg masses size of <i>M. incognita</i> by 39.49%. In summary, the present work found that <i>P. polymyxa</i> KM2501-1 has multiple activities to inhibit <i>M. incognita</i> at different stages and promotes plant growth, providing compelling evidence for its development as an alternative for current nematicides.</p>

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Evaluation of multiple inhibitory effects of Paenibacillus polymyxa KM2501-1 on Meloidogyne incognita

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • Wanli Cheng,
  • Wei Dai,
  • Wen Chen,
  • Xue Yang,
  • Ahmed R. Henawy,
  • Zhengbing Jiang,
  • Minmin Cai,
  • Longyu Zheng,
  • Ziniu Yu,
  • Jibin Zhang

摘要

Root-knot nematode (RKN) disease seriously affects crop growth and reduces crop yield, causing huge economic losses worldwide. Paenibacillus polymyxa KM2501-1 is a promising microbial agent with strong nematicidal activity against Meloidogyne incognita in vitro and good control efficiency on RKN diseases in the field. Baseline information about the effect of P. polymyxa KM2501-1 on the egg hatching, motility, and reproduction of M. incognita remains limited. In this study, the multiple inhibitory effects of P. polymyxa KM2501-1 on M. incognita were systematically investigated. After treatment with the culture filtrate (CF) of P. polymyxa KM2501-1, the egg hatching rate of M. incognita decreased by 93.49%, the frequencies of head thrash and body bend decreased by up to 99.17% and 99.20%, respectively. In pot experiments, P. polymyxa KM2501-1 exhibited better control efficiency on RKNs than the commercial nematicide avermectin, with reductions in root galls and population density of M. incognita in the tomato root and rhizosphere soil by 67.18%, 68.17%, and 47.77%, respectively. Additionally, the CF of P. polymyxa KM2501-1 significantly promoted the growth of tomato plants and reduced the egg masses size of M. incognita by 39.49%. In summary, the present work found that P. polymyxa KM2501-1 has multiple activities to inhibit M. incognita at different stages and promotes plant growth, providing compelling evidence for its development as an alternative for current nematicides.