|Group:||Group IV ((+)ssRNA)|
The Closteroviridae are a family of plant viruses with filamentous, helically constructed particles showing distinct cross-banding and varying in length from 650 nanometers (nm) to over 2000 nm. The genome is a single strand of positive sense RNA whose size varies from 13–19 kilobases.
The family Closteroviridae is currently divided into three genera. Genome type and transmission vector are two of the most important traits used for classification. Ampeloviruses and Closteroviruses have monopartite genomes and are transmitted by pseudococcid mealybugs (and soft scale insects) and aphids respectively. While Criniviruses are bipartite and transmitted by whiteflies.
- Genus Ampelovirus; type species: Grapevine leafroll-associated virus 3
- Genus Closterovirus; type species: Beet yellows virus
- Genus Crinivirus; type species: Lettuce infectious yellows virus
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