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<p>Late blight of potato, caused by <i>Phytophthora infestans</i> (Mont.) de Bary, remains one of the most destructive diseases of <i>Solanum tuberosum</i> crops worldwide. This review synthesizes current knowledge regarding pathogen biology, conventional and molecular diagnostic tools, genetic sources of resistance and integrated management approaches. Recent advances in breeding have enabled the identification and introgression of numerous resistance genes (<i>Rpi</i>) derived from wild <i>Solanum</i> species, although the rapid emergence of new virulent strains limits the long-term durability of these resistances. Molecular tools such as PCR, qPCR, and LAMP enhance early pathogen detection, a key prerequisite for effective management. Fungicide applications remain a cornerstone of control, but resistance cases have emerged for certain active ingredients, reinforcing the need for rational strategies based on rotating modes of action. Biological control particularly using <i>Bacillus</i>, <i>Pseudomonas</i>, <i>Trichoderma</i>, and various plant extracts show promising potential in reducing inoculum pressure. Truly sustainable management relies on combining these approaches: resistant cultivars, targeted fungicides, biological agents, good agricultural practices and decision-support tools backed by epidemiological modeling. This review highlights the importance of integrating molecular, agronomic and biotechnological advances to develop robust control strategies against a continually evolving pathogen.</p>

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Advances in Sustainable Management of Potato Late Blight (Phytophthora infestans): Resistance Breeding, Molecular Diagnostics and Integrated Control Strategies

  • 期刊论文

  • 发表日期：

    2026年5月23日

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  • Hicham El Bourki,
  • Ahlem Hamdache,
  • Ahmed Bagayou,
  • Yassine Diane,
  • Mohammed Ezziyyani

摘要

Late blight of potato, caused by Phytophthora infestans (Mont.) de Bary, remains one of the most destructive diseases of Solanum tuberosum crops worldwide. This review synthesizes current knowledge regarding pathogen biology, conventional and molecular diagnostic tools, genetic sources of resistance and integrated management approaches. Recent advances in breeding have enabled the identification and introgression of numerous resistance genes (Rpi) derived from wild Solanum species, although the rapid emergence of new virulent strains limits the long-term durability of these resistances. Molecular tools such as PCR, qPCR, and LAMP enhance early pathogen detection, a key prerequisite for effective management. Fungicide applications remain a cornerstone of control, but resistance cases have emerged for certain active ingredients, reinforcing the need for rational strategies based on rotating modes of action. Biological control particularly using Bacillus, Pseudomonas, Trichoderma, and various plant extracts show promising potential in reducing inoculum pressure. Truly sustainable management relies on combining these approaches: resistant cultivars, targeted fungicides, biological agents, good agricultural practices and decision-support tools backed by epidemiological modeling. This review highlights the importance of integrating molecular, agronomic and biotechnological advances to develop robust control strategies against a continually evolving pathogen.