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<p>Root-knot nematodes (<i>Meloidogyne javanica</i>) are among the most destructive pests of sweet pepper (<i>Capsicum annuum</i>). Sustainable alternatives to chemical nematicides are urgently needed. This study evaluated the synergistic effects of <i>Paecilomyces</i> sp. and the seaweed <i>Padina boergesenii</i> (powder and extract) on nematode management and plant growth. In vitro assays tested three concentrations of <i>Paecilomyces</i> sp. (10<sup>4</sup>, 10⁶, and 10<sup>1</sup>⁰ conidia mL⁻<sup>1</sup>) and different concentrations of <i>P. boergesenii</i> on juvenile survival and egg hatching. Greenhouse experiments employed the most effective fungal concentration (10<sup>1</sup>⁰ conidia mL⁻<sup>1</sup>) in combination with <i>P. boergesenii</i> powder or extract to assess nematode infestation, plant growth, pigment contents, and antioxidant activities. <i>Paecilomyces</i> sp. showed strong nematicidal activity, while <i>P. boergesenii</i> alone was moderately effective. When combined, particularly with the powder form, the treatments significantly reduced galling and nematode reproduction while enhancing plant growth, chlorophyll content, and antioxidant enzyme activities. The integration of <i>Paecilomyces</i> sp. with <i>P. boergesenii</i> offers a promising eco-friendly strategy for controlling <i>M. javanica</i> and promoting sweet pepper resilience, supporting its use in sustainable integrated pest management.</p>

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Synergistic Effects of Paecilomyces sp. and Padina boergesenii on Sweet Pepper Growth Under Stress of the Root-knot Nematode, Meloidogyne javanica

  • 期刊论文

  • 发表日期：

    2026年1月30日

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  • Atef M. El-Sagheer,
  • Yasser S. A. Mazrou,
  • Awatief F. Hifney,
  • Shimaa H. Salem,
  • Yasser Nehela,
  • Dalia A. Abdel-Wahab

摘要

Root-knot nematodes (Meloidogyne javanica) are among the most destructive pests of sweet pepper (Capsicum annuum). Sustainable alternatives to chemical nematicides are urgently needed. This study evaluated the synergistic effects of Paecilomyces sp. and the seaweed Padina boergesenii (powder and extract) on nematode management and plant growth. In vitro assays tested three concentrations of Paecilomyces sp. (104, 10⁶, and 101⁰ conidia mL⁻1) and different concentrations of P. boergesenii on juvenile survival and egg hatching. Greenhouse experiments employed the most effective fungal concentration (101⁰ conidia mL⁻1) in combination with P. boergesenii powder or extract to assess nematode infestation, plant growth, pigment contents, and antioxidant activities. Paecilomyces sp. showed strong nematicidal activity, while P. boergesenii alone was moderately effective. When combined, particularly with the powder form, the treatments significantly reduced galling and nematode reproduction while enhancing plant growth, chlorophyll content, and antioxidant enzyme activities. The integration of Paecilomyces sp. with P. boergesenii offers a promising eco-friendly strategy for controlling M. javanica and promoting sweet pepper resilience, supporting its use in sustainable integrated pest management.