Invasive Species Compendium

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Abstract

First report of leaf spot caused by Stemphylium lycopersici on Zinnia elegans in China.

Abstract

Zinnia elegans originated from Mexico and has been widely cultivated as an ornamental plant in China. In August 2018, leaf spots were observed on Z. elegans in Tai'an, Shandong province, China. The symptoms appeared on the edge of the leaves as small brown spots. In serious cases, the leaves were withered, which affected the ornamental value of the plants. The causal pathogen was isolated and identified as Stemphylium lycopersici based on morphological, molecular and pathogenicity analyses. Sequences of the strain were deposited in the GenBank with accession numbers MK895975 (ITS), MK895977 (gapdh) and MK895976 (cmdA). This is thought to be the first report of Z. elegans leaf spot caused by S. lycopersici in China.