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<p><i>Fusarium</i> species is one of the most common pathogens causing post-harvest disease in peas and several other perishable vegetables and fruits globally including India. In October 2024, necrotic lesions with black rotting in the harvested pea pods and white mycelial growth with dark brown lesions in the harvested cucumber fruits were observed in Himachal Pradesh, India. The causative pathogens were isolated and identified as <i>Fusarium equiseti</i>, based on cultural growth characteristics and spore morphology, which included aerial fluffy growth with beige-white septate mycelium and 9.66 to 39.19&#xa0;μm long and 0.60 to 5.34&#xa0;μm wider slightly curved macroconidia that resembled those used to define the <i>Fusarium</i> species, Molecular analysis through PCR amplification and sequence analysis of ITS1-<i>5.8&#xa0;S rRNA</i>-ITS2 regions, has confirmed the etiology of both diseases and revealed two different <i>F. equiseti</i> isolates AK_PHP and AK_PHC, which were clustered in two different phylogenetic clades. Koch’s postulates were supported by the pathogenicity assays, which showed differential virulence patterns in the inoculated pea pods and cucumber fruits as higher PDI values were recorded in pea pods (86% to 97%) for the isolate AK-PHP, and in cucumber fruits (88% and 92%) for the isolate AK-PHC, whereas the non-inoculated samples (controls) showed no signs of disease. As far as we are aware, this is the first instance of <i>F. equiseti</i> infections in harvested cucumber and green pea fruits linked to rotting in India.</p>

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‘Fusarium equiseti’-induced pod rot in pea and fruit rot in cucumber: first report of post-harvest diseases in India

  • 期刊论文

  • 发表日期：

    2026年1月21日

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  • Arunesh Kumar,
  • Meenu Gupta,
  • Surender Kumar,
  • Anupama Singh,
  • Chidembra Bhardwaj,
  • Muskan Thakur,
  • Janvi Thakur

摘要

Fusarium species is one of the most common pathogens causing post-harvest disease in peas and several other perishable vegetables and fruits globally including India. In October 2024, necrotic lesions with black rotting in the harvested pea pods and white mycelial growth with dark brown lesions in the harvested cucumber fruits were observed in Himachal Pradesh, India. The causative pathogens were isolated and identified as Fusarium equiseti, based on cultural growth characteristics and spore morphology, which included aerial fluffy growth with beige-white septate mycelium and 9.66 to 39.19 μm long and 0.60 to 5.34 μm wider slightly curved macroconidia that resembled those used to define the Fusarium species, Molecular analysis through PCR amplification and sequence analysis of ITS1-5.8 S rRNA-ITS2 regions, has confirmed the etiology of both diseases and revealed two different F. equiseti isolates AK_PHP and AK_PHC, which were clustered in two different phylogenetic clades. Koch’s postulates were supported by the pathogenicity assays, which showed differential virulence patterns in the inoculated pea pods and cucumber fruits as higher PDI values were recorded in pea pods (86% to 97%) for the isolate AK-PHP, and in cucumber fruits (88% and 92%) for the isolate AK-PHC, whereas the non-inoculated samples (controls) showed no signs of disease. As far as we are aware, this is the first instance of F. equiseti infections in harvested cucumber and green pea fruits linked to rotting in India.