Closterovirus, also known as beet yellows viral group, is a genus of viruses, in the family Closteroviridae.

[1][2] Diseases associated with this genus include: yellowing and necrosis, particularly affecting the phloem.

[1][3] This genus has a probably worldwide distribution and includes among other viral species the Beet yellows virus (the type species) and Citrus tristeza virus, rather economically important plant diseases.

[4] These secondary structures have been found to be important in viral RNA replication.

The virus exits the host cell by tubule-guided viral movement.