Invasive Species Compendium

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Abstract

Occurrence of leaf spot disease on date palm caused by Neopestalotiopsis clavispora in Iran.

Abstract

In May 2016, symptoms of circular leaf spots with concentric rings, later developing into irregular lesions were observed on the leaves of date palm (Phoenix dactylifera) in Sari County, Iran. Fungal isolations were done based on conventional methods. Woolly-cottony white colonies were grown on PDA. After 10 days, black acervuli distributed in concentric circles appeared throughout the entire plate. Based on morphological characteristics, molecular data (sequencing of the ITS region amplified by ITS5 and ITS4 primers) and pathogenicity, the causal agent was identified as Neopestalotiopsis clavispora. This is thought to be the first report of leaf spot caused by N. clavispora on date palm in Iran.