Abstract
The Ceylon Journal of Science is published by the University of Peradeniya, Sri Lanka. Full text available. The journal also has its own website. The Ceylon Journal of Science is a continuation of the Ceylon Journal of Science (Biological Sciences) which is no longer being published as a separate journal. The history of the journal can be found here.From May 2020, Ceylon Journal of Science is indexed in DOAJ.
Highlights
Zinnias (Zinnia elegans; Family Asteraceae) are popular as bedding plants and cut flowers due to their vibrant colours
Nursery-grown Zinnias (Zinnia elegans) in Peradeniya, Central Province, Sri Lanka showed necrotic, reddish-brown, circular to irregular-shaped, 1-2 mm diameter spots scattered over the leaves and ray florets which developed a whitish center with time
This study provides the first report of Curvularia senegalensis causing leaf and floral spots on Z. elegans in Sri Lanka
Summary
Zinnias (Zinnia elegans; Family Asteraceae) are popular as bedding plants and cut flowers due to their vibrant colours. Most of them are fungal diseases including powdery mildew caused by Golovinomyces cicchoracearum and Alternaria blight caused by Alternaria zinniae that may result in severe plant loss and decrease of ornamental value (Szopińska, 2016). Other fungal pathogens such as Cercospora zinniae, Botrytis cinerea, Fusarium spp., Pythium spp., Rhizoctonia solani (Szopińska, 2016), and Curvularia spp. The spots developed a whitish center and the necrotic spots merged, and the whole leaf/ flower was infected (Figures 1a-b) These symptoms were quite similar to those of Cercospora leaf spot, which is common in Zinnia (Szopińska, 2016). The objective of this study was to identify the pathogen responsible for this leaf/flower spot disease using morphological, pathological, and molecular data
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