L.), barley (Hordeum vulgare L.), rye (Secale cereale M.Bieb.

), and oat (Avena sativa L.) pathogenic virus of the family Closteroviridae.

[2] Identified vectors include Rhopalosiphum padi L. and R. maidis Fitch.

[2][4] The virus has been identified in crop plants in Japan, China, and Italy.

[2] Native host plants include Italian ryegrass (Festuca perennis Lam.)