Although potato is the main host for this viroid, it has since
emerged in other hosts (including tomato), and the viroid is capable
of replicating within 160 species of the Solanaceae [6,11]. In addition,
symptomless PSTVd infection has been detected in Cape gooseberry,
pepino, and avocado, and symptomless hosts are believed to have the
potential to contribute to the spread of this pathogen to susceptible
hosts [6,9].