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<p>Over the last decade, leaf blight has emerged as the most important disease affecting date palms in Iran and has led to a decrease in date production. During 2016–2019, samples including various spots on leaflets, as well as yellowish, dried, and hanging leaves, were collected from five provinces of Iran<i>.</i>&#xa0;Nine fungal genera were identified, including the taxa of <i>Alternaria</i> spp.,<i> Aspergillus</i> sp., <i>Aureobasidium iranianum</i>,<i> Coniochaeta</i> sp., <i>Epicoccum</i> spp.,<i> Fusarium</i> spp., <i>Nigrospora</i> spp., <i>Stemphylium</i> spp. and <i>Trichothecium</i> sp. Pathogenicity of 14 isolates was proven to fulfill Koch’s postulate. In greenhouse conditions,<i> Alternaria</i> sp. 10-OL853550, <i>Aspergillus</i> sp.-OL853541, <i>Epicoccum</i> sp. 14- OL853535, <i>Stemphylium</i> sp. 1-OL853564, <i>Stemphylium</i> sp. 2-OL853564, and <i>Trichothecium</i> sp.-OL853536 produced leaflet brown spots, while <i>Aureobasidium iranianum</i>-OL853551, <i>Coniochaeta</i> sp.-OR708661,<i> Nigrospora</i> sp. 1-OL853538,&#xa0;and <i>Nigrospora</i> sp. 2-OL853563 produced leaflet yellowing. However, <i>Fusarium</i> sp. 1-OL853561 and <i>Fusarium</i> sp. 4 (isolate-426) caused the drying of leaflets. To the best of our knowledge, this is the first report of the pathogenicity of<i> Aureobasidium iranianum</i>, <i>Epicoccum</i> spp., <i>Nigrospora</i> spp. and <i>Trichothecium</i> sp. on date palm leaves in Iran. These findings will help in guiding research on management of palm leaf blight.</p>

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A survey on fungal leaf diseases of date palm in Iran

  • 期刊论文

  • 发表日期：

    2025年4月30日

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  • Azam Shekariesfahlan,
  • Mohammad Reza Eslahi,
  • Mohammad-Reza Mirzaee,
  • Farzad Karampour,
  • Azadeh Goudarzi,
  • Sara Zarghami

摘要

Over the last decade, leaf blight has emerged as the most important disease affecting date palms in Iran and has led to a decrease in date production. During 2016–2019, samples including various spots on leaflets, as well as yellowish, dried, and hanging leaves, were collected from five provinces of Iran. Nine fungal genera were identified, including the taxa of Alternaria spp., Aspergillus sp., Aureobasidium iranianum, Coniochaeta sp., Epicoccum spp., Fusarium spp., Nigrospora spp., Stemphylium spp. and Trichothecium sp. Pathogenicity of 14 isolates was proven to fulfill Koch’s postulate. In greenhouse conditions, Alternaria sp. 10-OL853550, Aspergillus sp.-OL853541, Epicoccum sp. 14- OL853535, Stemphylium sp. 1-OL853564, Stemphylium sp. 2-OL853564, and Trichothecium sp.-OL853536 produced leaflet brown spots, while Aureobasidium iranianum-OL853551, Coniochaeta sp.-OR708661, Nigrospora sp. 1-OL853538, and Nigrospora sp. 2-OL853563 produced leaflet yellowing. However, Fusarium sp. 1-OL853561 and Fusarium sp. 4 (isolate-426) caused the drying of leaflets. To the best of our knowledge, this is the first report of the pathogenicity of Aureobasidium iranianum, Epicoccum spp., Nigrospora spp. and Trichothecium sp. on date palm leaves in Iran. These findings will help in guiding research on management of palm leaf blight.