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<p>The citrus root lesion nematode (<i>Pratylenchus jaehni</i>) is widespread in Brazilian citrus orchards and causes high damage. It can be efficiently controlled by non-host rootstocks, but the Rangpur lime (<i>Citrus limonia</i>) is a widely used rootstock in Brazil which is a suitable host for <i>P</i>. <i>jaehni</i>. For citrus grafted onto Rangpur lime in fields infested by <i>P</i>. <i>jaehni</i>, the only control method available is the use of synthetic nematicides. An untested approach to sustainable citrus production is the use of non-host species of cover crops for citrus pre- or post-planting. However, information on the host status of cover crops to <i>P</i>. <i>jaehni</i> is almost absent. Therefore, the host status of five cover crops was evaluated in two greenhouse trials. None of them proved to be non-hosts of the nematode. However, pigeon pea and gray velvet bean were rated as poor hosts, and should be considered for <i>P</i>. <i>jaehni</i> management. Conversely, hyacinth bean and jack bean were rated as good hosts and must be avoided in citrus orchards infested with <i>P</i>. <i>jaehni</i>. Sunn hemp was rated as a moderate host.</p>

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Cover crops for Pratylenchus jaehni management in citrus

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月10日

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  • Diego Gonçalves Ribeiro Lucas,
  • Nicole Ribeiro Martins,
  • Natália Lopera Tabanez,
  • Mariana Mailkut dos Santos Luiz,
  • Mário Massayuki Inomoto

摘要

The citrus root lesion nematode (Pratylenchus jaehni) is widespread in Brazilian citrus orchards and causes high damage. It can be efficiently controlled by non-host rootstocks, but the Rangpur lime (Citrus limonia) is a widely used rootstock in Brazil which is a suitable host for P. jaehni. For citrus grafted onto Rangpur lime in fields infested by P. jaehni, the only control method available is the use of synthetic nematicides. An untested approach to sustainable citrus production is the use of non-host species of cover crops for citrus pre- or post-planting. However, information on the host status of cover crops to P. jaehni is almost absent. Therefore, the host status of five cover crops was evaluated in two greenhouse trials. None of them proved to be non-hosts of the nematode. However, pigeon pea and gray velvet bean were rated as poor hosts, and should be considered for P. jaehni management. Conversely, hyacinth bean and jack bean were rated as good hosts and must be avoided in citrus orchards infested with P. jaehni. Sunn hemp was rated as a moderate host.