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<p>Cashew nut (<i>Anacardium occidentale</i> L.) is an important commercial crop and is prone to many biotic and abiotic stresses. Among biotic stresses leaf spots and blight incited by fungi are taking heavy toll on the crop. Cashew leaf blight samples were collected from the Agriculture Experimental Station, NAU, Paria, Gujarat. Typical symptoms were observed in the form of minute to irregular necrotic spots at the margins of leaf, leaf midrib and leaf petiole. These spots enlarged, turned silvery-grey to brown, later showed blight appearance and premature defoliation. The pathogen was isolated and proved for its pathogenicity. Based on cultural, morphological characters and microscopic observations pathogen was identified as <i>Pestalotiopsis</i> sp. Further DNA was isolated and ITS gene was sequenced and analyzed using nucleotide BLAST in NCBI database and confirmed the species as <i>Pestalotiopsis maculans</i>. ITS gene sequence was submitted to NCBI with the GenBank accession No PV533754. A phylogenetic tree was generated from the ITS sequences and evolutionary relation was studied. This is the first report of cashew leaf blight disease caused by <i>Pestalotiopsis maculans</i> from Gujarat, India.</p>

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First report of Pestalotiopsis maculans (Corda) Nag Raj causing leaf blight disease of cashew nut in Gujarat, India

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • K. S. Jotangiya,
  • N. K. Gajre,
  • K. C. Addangadi,
  • Priya John,
  • Sonal S. Patel

摘要

Cashew nut (Anacardium occidentale L.) is an important commercial crop and is prone to many biotic and abiotic stresses. Among biotic stresses leaf spots and blight incited by fungi are taking heavy toll on the crop. Cashew leaf blight samples were collected from the Agriculture Experimental Station, NAU, Paria, Gujarat. Typical symptoms were observed in the form of minute to irregular necrotic spots at the margins of leaf, leaf midrib and leaf petiole. These spots enlarged, turned silvery-grey to brown, later showed blight appearance and premature defoliation. The pathogen was isolated and proved for its pathogenicity. Based on cultural, morphological characters and microscopic observations pathogen was identified as Pestalotiopsis sp. Further DNA was isolated and ITS gene was sequenced and analyzed using nucleotide BLAST in NCBI database and confirmed the species as Pestalotiopsis maculans. ITS gene sequence was submitted to NCBI with the GenBank accession No PV533754. A phylogenetic tree was generated from the ITS sequences and evolutionary relation was studied. This is the first report of cashew leaf blight disease caused by Pestalotiopsis maculans from Gujarat, India.