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<p>During June–July 2024, brown leaf spot symptoms were observed on apricot trees (<i>Prunus armeniaca</i> L.) in Swat, Pakistan. The symptoms manifested as small, irregular, brown to tan necrotic lesions with distinct dark margins. Fungal isolation from infected leaves, followed by morphological characterization and multi-locus sequence analysis of the internal transcribed spacer (ITS), RNA polymerase II second largest subunit (RPB2), and large subunit (LSU) regions, revealed <i>Epicoccum sorghinum</i> as the causal pathogen. Pathogenicity tests were conducted in accordance with Koch’s postulates which confirmed that inoculated leaves developed symptoms identical to those observed in the field. This study represents the first report of <i>E. sorghinum</i> causing leaf spot disease in apricot, thereby expanding its known host range.</p>

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First report of Epicoccum sorghinum causing leaf spot on apricot (Prunus armeniaca) in Pakistan

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • Waqas Ahmad,
  • Shahid Hussain,
  • Usman Ali,
  • Mushtaq Ahmad,
  • Shakir Ullah

摘要

During June–July 2024, brown leaf spot symptoms were observed on apricot trees (Prunus armeniaca L.) in Swat, Pakistan. The symptoms manifested as small, irregular, brown to tan necrotic lesions with distinct dark margins. Fungal isolation from infected leaves, followed by morphological characterization and multi-locus sequence analysis of the internal transcribed spacer (ITS), RNA polymerase II second largest subunit (RPB2), and large subunit (LSU) regions, revealed Epicoccum sorghinum as the causal pathogen. Pathogenicity tests were conducted in accordance with Koch’s postulates which confirmed that inoculated leaves developed symptoms identical to those observed in the field. This study represents the first report of E. sorghinum causing leaf spot disease in apricot, thereby expanding its known host range.