Viroids are infectious pathogens that only damage plants and are thus referred to as plant pathogens.
Many plant diseases of significant economic relevance have been linked to viroids since their discovery, including PSTVd in potatoes, and Chrysanthemum stunt viroid (CSVd) in chrysanthemum.
Avocado and Coconut Cadang-cadang Viroid (CCCVd) in Coconut Palm.