What is "polerovirus"

Polerovirus is a genus of viruses, in the family Luteoviridae. Plants serve as natural hosts. There are currently 17 species in this genus including the type species Potato leafroll virus. Diseases associated with this genus include: PLRV causes prominent rolling of the leaves of potato and a stiff upright habit of the plants; necrosis of the phloem and accumulation of carbohydrates in the leaves.