The hop stunt viroid (abbreviated HSVd, binomial name Hostuviroid impedihumuli) is a viroid species that infects the common hop plant,[1] citrus plants, grapevines, cucumber, and several Prunus species such as almond, apricot, plum, and peach.

A study of HSVd-infected hops in the USA showed that the severity of yield reduction was highly dependent on the infected hop cultivar.

[4] HSVd is a member of the Pospiviroidae family and the Hostuviroid genus.

There are various different sub-species of the hop stunt viroid.

The hop stunt viroid has a single-stranded RNA genome; the genome is 297 nucleotides long.