Characterisation of cucumber leaf spot virus isolated from recycled irrigation water of soil‐less cucumber cultures

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Abstract
Greenhouse‐grown cucumber plants showed mosaic‐type symptoms and irregular yellow spots on their leaves. The disease did not affect plant growth and the fruits remained symptom free. A virus having isometric particles, 30 nm in size, was isolated from the infected tissues and from recycled drainage water collected from tuff (volcanic rock) raised beds on which plants were grown. The virus was identified as a variant of cucumber leaf spot virus (CLSV) that has a host range similar but not identical to that of a previously described CLSV isolate. The overall nucleotide sequence identity between the RNAs of the Israeli isolate and the type isolate virus (accession numbers: DQ227315 and AY571334, respectively) amounts to 96%.

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