Carlavirus

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Carlavirus, also known as "Carnation latent virus group" is a genus of virus that infects plants. It contains thirty-five described species and twenty-nine tentative species. (Astier)

Infection is at times spread by aphids in a semi-persistent mode, that is, the vector is infective for a number of hours.(Pimentel) Some species are transmitted by Bemisia tabaci in a semi-persistent mode or through the seed.(Astier) Most species infect only a few hosts and and cause infections with few or no symptoms, for example, American hop latent virus and lily symptomless virus. Some, such as blueberry scorch virus and poplar mosaic virus, cause serious illnesses. (Foster)

Virions have straight or slightly flexuous filaments. Some authorities say that the Family is undetermined; others classify Carlavirus as Family Flexiviridae. It is a positive stranded ssRNA virus.