Cucurbit chlorotic yellows virus
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Cucurbit chlorotic yellows virus (CCYV)
This virus is found in the Meditarranean region, Asia and parts of Africa. It infects different cucurbits as well as some other crops and weeds. The symptoms include chlorotic leaf spots, interveinal chlorosis and complete yellowing of the leaves.
Yield losses of up to 20% have been reported. It is transmitted by the whitefly Bemisia tabaci in a semipersistent manner. The genome of the virus consists of single-stranded positive-sense RNA and is composed of 2 RNA segments, RNA1 with 8607 nt and RNA2 with 8041 nt. It is one of the largest single-strand positive-sense RNA viruses.