Scholarlink

<p>Nematode repellents could be an effective means of nematode management, but no commercial products have been developed. Extracts of spent coffee grounds (SCG) and <i>Myrtus communis</i> (Mc) leaves have been reported to repel second-stage juveniles (J2) of root-knot nematodes (<i>Meloidogyne</i> spp.) and inhibit infection of lettuce roots. In the present study, these extracts, in combination with the chemical nematicide fluensulfone or the predatory nematode <i>Allodiplogaster sudhausi</i>, were tested to control <i>M. javanica</i>, <i>M. incognita</i>, and <i>M. hapla</i>. A single application of fluensulfone at ≤ 0.5&#xa0;mg/L or the SCG extract at 580&#xa0;mg/L could not prevent <i>Meloidogyne</i> J2 from infecting lettuce seedling roots grown in agar plates, but their combination decreased the infection rates by 33.4–100% and increased the root length by 75.3–236% for the three <i>Meloidogyne</i> species. Similar effects were observed when fluensulfone was combined with the Mc extract: a 91.7–100% reduction in infection and a 130–160% increase in root length. Combining the SCG or Mc extracts with <i>A. sudhausi</i> reduced the infection rates synergistically and increased root lengths. Several compounds reported in roast coffee and Mc extracts, and their derivatives, such as caffeic acid, isoeugenol, and ferulic acid, reduced the number of J2 attracted to lettuce roots and the infection rates, and increased root length. The synergistic effect of combining chemical or biological control methods with the extracts could provide a new potential control strategy.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synergistic control of Meloidogyne species on agar plates by plant extracts combined with a nematicide or biocontrol agent

  • 期刊论文

  • 发表日期：

    2025年12月1日

查看全文
  • Yuji Oka

摘要

Nematode repellents could be an effective means of nematode management, but no commercial products have been developed. Extracts of spent coffee grounds (SCG) and Myrtus communis (Mc) leaves have been reported to repel second-stage juveniles (J2) of root-knot nematodes (Meloidogyne spp.) and inhibit infection of lettuce roots. In the present study, these extracts, in combination with the chemical nematicide fluensulfone or the predatory nematode Allodiplogaster sudhausi, were tested to control M. javanica, M. incognita, and M. hapla. A single application of fluensulfone at ≤ 0.5 mg/L or the SCG extract at 580 mg/L could not prevent Meloidogyne J2 from infecting lettuce seedling roots grown in agar plates, but their combination decreased the infection rates by 33.4–100% and increased the root length by 75.3–236% for the three Meloidogyne species. Similar effects were observed when fluensulfone was combined with the Mc extract: a 91.7–100% reduction in infection and a 130–160% increase in root length. Combining the SCG or Mc extracts with A. sudhausi reduced the infection rates synergistically and increased root lengths. Several compounds reported in roast coffee and Mc extracts, and their derivatives, such as caffeic acid, isoeugenol, and ferulic acid, reduced the number of J2 attracted to lettuce roots and the infection rates, and increased root length. The synergistic effect of combining chemical or biological control methods with the extracts could provide a new potential control strategy.